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Comparing Coro/Coro/State.xs (file contents):
Revision 1.59 by root, Mon Jul 19 01:32:27 2004 UTC vs.
Revision 1.238 by root, Sat May 31 12:10:55 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 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 PATCHLEVEL < 6 12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# endif
34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
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)
10# ifndef PL_ppaddr 65# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
12# endif 67# endif
13# ifndef call_sv 68# ifndef call_sv
14# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 80# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
27# endif 82# endif
28#endif 83#endif
29 84
30#include "libcoro/coro.c" 85/* 5.8.8 */
31 86#ifndef GV_NOTQUAL
32#include <signal.h> 87# define GV_NOTQUAL 0
33
34#ifdef HAVE_MMAP
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif
43# endif 88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
44#endif 91#endif
45 92
46#define SUB_INIT "Coro::State::initialize" 93/* 5.11 */
47#define UCORO_STATE "_coro_state" 94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
48 97
49/* The next macro should declare a variable stacklevel that contains and approximation 98/* 5.8.7 */
50 * to the current C stack pointer. Its property is that it changes with each call 99#ifndef SvRV_set
51 * and should be unique. */ 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. */
118#define dSTACKLEVEL volatile char stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
53 120
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 122
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
57 137
58#include "CoroAPI.h" 138#include "CoroAPI.h"
59 139
60#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 144#else
65# define LOCK 0 145# define LOCK (void)0
66# define UNLOCK 0 146# define UNLOCK (void)0
67#endif 147#endif
68 148
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;
69static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
70static 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;
71static HV *coro_state_stash; 162static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
75 164
76/* this is actually not only the c stack but also c registers etc... */ 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;
178
179static struct coro_cctx *cctx_first;
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};
190
191/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx {
193 struct coro_cctx *next;
194
195 /* the stack */
196 void *sptr;
197 size_t ssize;
198
199 /* cpu state */
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 */
202 JMPENV *top_env;
203 coro_context cctx;
204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
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 */
77typedef struct { 219typedef struct {
78 int refcnt; /* pointer reference counter */ 220 SV *defsv;
79 int usecnt; /* shared by how many coroutines */ 221 AV *defav;
80 int gencnt; /* generation counter */ 222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
81 228
82 coro_context cctx; 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83 230
84 void *sptr; 231/* this is a structure representing a perl-level coroutine */
85 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87
88struct coro { 232struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 234 coro_cctx *cctx;
91 235
92 /* the optional C context */ 236 /* process data */
93 coro_stack *stack;
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 237 AV *mainstack;
110 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 239
135 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
136 AV *args; 241 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
244
245 /* statistics */
246 int usecount; /* number of transfers to this coro */
247
248 /* coro process data */
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;
137}; 257};
138 258
139typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
141 261
142/* mostly copied from op.c:cv_clone2 */ 262/** Coro ********************************************************************/
143STATIC AV * 263
144clone_padlist (pTHX_ AV *protopadlist) 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)
145{ 282{
146 AV *av; 283#if PERL_VERSION_ATLEAST (5,10,0)
147 I32 ix; 284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 285 get_sv (name, create);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 286#endif
150 SV **pname = AvARRAY (protopad_name); 287 return get_sv (name, create);
151 SV **ppad = AvARRAY (protopad); 288}
152 I32 fname = AvFILLp (protopad_name); 289
153 I32 fpad = AvFILLp (protopad); 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 *
311coro_clone_padlist (pTHX_ CV *cv)
312{
313 AV *padlist = CvPADLIST (cv);
154 AV *newpadlist, *newpad_name, *newpad; 314 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 315
165 newpadlist = newAV (); 316 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist);
325
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168 av_store (newpadlist, 1, (SV *) newpad); 327 av_store (newpadlist, 1, (SV *)newpad);
169
170 av = newAV (); /* will be @_ */
171 av_extend (av, 0);
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174
175 for (ix = fpad; ix > 0; ix--)
176 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179 if (namesv && namesv != &PL_sv_undef)
180 {
181 char *name = SvPVX (namesv); /* XXX */
182
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184 { /* lexical from outside? */
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198
199#ifdef SvPADBUSY
200 if (!SvPADBUSY (sv))
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218
219#if 0 /* return -ENOTUNDERSTOOD */
220 /* Now that vars are all in place, clone nested closures. */
221
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238 328
239 return newpadlist; 329 return newpadlist;
240} 330}
241 331
242STATIC void 332static void
243free_padlist (pTHX_ AV *padlist) 333free_padlist (pTHX_ AV *padlist)
244{ 334{
245 /* may be during global destruction */ 335 /* may be during global destruction */
246 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
247 { 337 {
… …
261 351
262 SvREFCNT_dec ((SV*)padlist); 352 SvREFCNT_dec ((SV*)padlist);
263 } 353 }
264} 354}
265 355
266STATIC int 356static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 357coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 358{
269 AV *padlist; 359 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
271 361
272 /* casting is fun. */ 362 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
275}
276 365
366 return 0;
367}
368
277#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
278 371
279static 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))
280 412
281/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
282STATIC void 414static void
283get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
284{ 416{
285 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
286 419
287 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
288 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289 else 422 else
423 {
424#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */
426 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp);
430#else
290 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
432#endif
433 }
291} 434}
292 435
293STATIC void 436static void
294put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
295{ 438{
296 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
297 441
298 if (!mg) 442 if (expect_false (!mg))
299 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
300 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302 mg->mg_virtual = &vtbl_coro;
303 mg->mg_obj = (SV *)newAV ();
304 }
305 444
306 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
307}
308 446
309#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
310#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
311 449
312#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
313#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
314 452
315#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
316 454
317static void 455static void
318load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
319{ 457{
320 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
321 PL_in_eval = c->in_eval; 459 c->slot = 0;
322 460
323 PL_curstackinfo = c->curstackinfo;
324 PL_curstack = c->curstack;
325 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
326 PL_stack_sp = c->stack_sp;
327 PL_op = c->op;
328 PL_curpad = c->curpad;
329 PL_comppad = c->comppad;
330 PL_stack_base = c->stack_base;
331 PL_stack_max = c->stack_max;
332 PL_tmps_stack = c->tmps_stack;
333 PL_tmps_floor = c->tmps_floor;
334 PL_tmps_ix = c->tmps_ix;
335 PL_tmps_max = c->tmps_max;
336 PL_markstack = c->markstack;
337 PL_markstack_ptr = c->markstack_ptr;
338 PL_markstack_max = c->markstack_max;
339 PL_scopestack = c->scopestack;
340 PL_scopestack_ix = c->scopestack_ix;
341 PL_scopestack_max = c->scopestack_max;
342 PL_savestack = c->savestack;
343 PL_savestack_ix = c->savestack_ix;
344 PL_savestack_max = c->savestack_max;
345 PL_retstack = c->retstack;
346 PL_retstack_ix = c->retstack_ix;
347 PL_retstack_max = c->retstack_max;
348 PL_curcop = c->curcop;
349 PL_top_env = c->top_env;
350 462
351 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
352 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
353 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
354 471
355 { 472 {
356 dSP; 473 dSP;
474
357 CV *cv; 475 CV *cv;
358 476
359 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
360 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
361 { 479 {
362 AV *padlist = (AV *)POPs;
363
364 if (padlist)
365 {
366 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
367 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
368 } 482 CvPADLIST (cv) = (AV *)POPs;
369
370 ++CvDEPTH(cv);
371 } 483 }
372 484
373 PUTBACK; 485 PUTBACK;
374 } 486 }
375} 487}
376 488
377static void 489static void
378save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
379{ 491{
380 { 492 {
381 dSP; 493 dSP;
382 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
383 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
386 /* 498 /*
387 * 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
388 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
389 */ 501 */
390 502
391 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
392 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
393 for (;;) 505 for (;;)
394 { 506 {
395 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
396 { 508 {
397 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
398 510
399 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400 { 512 {
401 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
402 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
403 { 516 {
404 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
405
406 while (--CvDEPTH(cv))
407 {
408 /* this tells the restore code to increment CvDEPTH */
409 PUSHs (Nullsv);
410 PUSHs ((SV *)cv);
411 }
412
413 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
415 521
522 CvDEPTH (cv) = 0;
416 get_padlist (aTHX_ cv); /* this is a monster */ 523 get_padlist (aTHX_ cv);
417 } 524 }
418 } 525 }
419#ifdef CXt_FORMAT
420 else if (CxTYPE(cx) == CXt_FORMAT)
421 {
422 /* I never used formats, so how should I know how these are implemented? */
423 /* my bold guess is as a simple, plain sub... */
424 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425 }
426#endif
427 } 526 }
428 527
429 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 529 break;
431 530
432 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
435 } 534 }
436 535
437 PUTBACK; 536 PUTBACK;
438 } 537 }
439 538
440 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
441 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
442 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 */
443 550
444 c->dowarn = PL_dowarn;
445 c->in_eval = PL_in_eval;
446
447 c->curstackinfo = PL_curstackinfo;
448 c->curstack = PL_curstack;
449 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
450 c->stack_sp = PL_stack_sp; 552
451 c->op = PL_op; 553 {
452 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
453 c->comppad = PL_comppad; 555
454 c->stack_base = PL_stack_base; 556 slot->defav = GvAV (PL_defgv);
455 c->stack_max = PL_stack_max; 557 slot->defsv = DEFSV;
456 c->tmps_stack = PL_tmps_stack; 558 slot->errsv = ERRSV;
457 c->tmps_floor = PL_tmps_floor; 559 slot->irsgv = GvSV (irsgv);
458 c->tmps_ix = PL_tmps_ix; 560
459 c->tmps_max = PL_tmps_max; 561 #define VAR(name,type) slot->name = PL_ ## name;
460 c->markstack = PL_markstack; 562 # include "state.h"
461 c->markstack_ptr = PL_markstack_ptr; 563 #undef VAR
462 c->markstack_max = PL_markstack_max; 564 }
463 c->scopestack = PL_scopestack;
464 c->scopestack_ix = PL_scopestack_ix;
465 c->scopestack_max = PL_scopestack_max;
466 c->savestack = PL_savestack;
467 c->savestack_ix = PL_savestack_ix;
468 c->savestack_max = PL_savestack_max;
469 c->retstack = PL_retstack;
470 c->retstack_ix = PL_retstack_ix;
471 c->retstack_max = PL_retstack_max;
472 c->curcop = PL_curcop;
473 c->top_env = PL_top_env;
474} 565}
475 566
476/* 567/*
477 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
478 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
479 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
480 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
481 */ 572 */
482STATIC void 573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
576static void
483coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
484{ 578{
485 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
486
487 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
489 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
490 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491 583
492 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
493 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
494 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495 587
496 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
497 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
498 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
499 PL_tmps_max = 96; 591 PL_tmps_max = 32;
500 592
501 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
502 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
503 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
504 596
505#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
506 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
507#endif 599#endif
508 600
509 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
510 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
511 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
512 604
513 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
514 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
515 PL_savestack_max = 96; 607 PL_savestack_max = 24;
516 608
609#if !PERL_VERSION_ATLEAST (5,10,0)
517 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
518 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
519 PL_retstack_max = 8; 612 PL_retstack_max = 4;
520 613#endif
521 UNLOCK;
522} 614}
615#endif
523 616
524/* 617/*
525 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
526 */ 619 */
527STATIC void 620static void
528destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
529{ 622{
530 if (!IN_DESTRUCT)
531 {
532 /* is this ugly, I ask? */
533 LEAVE_SCOPE (0);
534
535 /* sure it is, but more important: is it correct?? :/ */
536 FREETMPS;
537
538 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
539 }
540
541 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
542 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
543 625
544 while (PL_curstackinfo) 626 while (PL_curstackinfo)
545 { 627 {
546 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
547 629
548 { /*D*//*remove*/
549 dSP;
550 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
551 PUTBACK; /* possibly superfluous */
552 }
553
554 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
555 {
556 dounwind (-1);/*D*//*remove*/
557 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
558 }
559 632
560 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
561 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
562 PL_curstackinfo = p; 635 PL_curstackinfo = p;
563 } 636 }
564 637
565 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
566 Safefree (PL_markstack); 639 Safefree (PL_markstack);
567 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
568 Safefree (PL_savestack); 641 Safefree (PL_savestack);
642#if !PERL_VERSION_ATLEAST (5,10,0)
569 Safefree (PL_retstack); 643 Safefree (PL_retstack);
644#endif
645}
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);
688
689/* apparently < 5.8.8 */
690#undef MgPV_nolen_const
691#ifndef MgPV_nolen_const
692#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
693 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
694 (const char*)(mg)->mg_ptr)
695#endif
696
697/*
698 * This overrides the default magic get method of %SIG elements.
699 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
700 * and instead of tryign to save and restore the hash elements, we just provide
701 * readback here.
702 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
703 * not expecting this to actually change the hook. This is a potential problem
704 * when a schedule happens then, but we ignore this.
705 */
706static int
707coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
708{
709 const char *s = MgPV_nolen_const (mg);
710
711 if (*s == '_')
712 {
713 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
714 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
715 }
716
717 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
718}
719
720static int
721coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
722{
723 const char *s = MgPV_nolen_const (mg);
724
725 if (*s == '_')
726 {
727 SV **svp = 0;
728
729 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
730 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
731
732 if (svp)
733 {
734 SV *old = *svp;
735 *svp = newSVsv (sv);
736 SvREFCNT_dec (old);
737 return 0;
738 }
739 }
740
741 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
570} 742}
571 743
572static void 744static void
573allocate_stack (Coro__State ctx, int alloc) 745coro_setup (pTHX_ struct coro *coro)
574{
575 coro_stack *stack;
576
577 New (0, stack, 1, coro_stack);
578
579 stack->refcnt = 1;
580 stack->usecnt = 1;
581 stack->gencnt = ctx->gencnt = 0;
582
583 if (alloc)
584 {
585#if HAVE_MMAP
586 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 if (stack->sptr == (void *)-1)
589#endif
590 {
591 /*FIXME*//*D*//* reasonable stack size! */
592 stack->ssize = - (8192 * sizeof (long));
593 New (0, stack->sptr, 8192, long);
594 }
595 }
596 else
597 stack->sptr = 0;
598
599 ctx->stack = stack;
600}
601
602static void
603deallocate_stack (Coro__State ctx)
604{
605 coro_stack *stack = ctx->stack;
606
607 ctx->stack = 0;
608
609 if (stack)
610 {
611 if (!--stack->refcnt)
612 {
613#ifdef HAVE_MMAP
614 if (stack->ssize > 0 && stack->sptr)
615 munmap (stack->sptr, stack->ssize);
616 else
617#endif
618 Safefree (stack->sptr);
619
620 Safefree (stack);
621 }
622 else if (ctx->gencnt == stack->gencnt)
623 --stack->usecnt;
624 }
625}
626
627static void
628setup_coro (void *arg)
629{ 746{
630 /* 747 /*
631 * emulate part of the perl startup here. 748 * emulate part of the perl startup here.
632 */ 749 */
633 dTHX;
634 dSP;
635 Coro__State ctx = (Coro__State)arg;
636 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637
638 coro_init_stacks (aTHX); 750 coro_init_stacks (aTHX);
639 /*PL_curcop = 0;*/ 751
640 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 752 PL_runops = RUNOPS_DEFAULT;
753 PL_curcop = &PL_compiling;
754 PL_in_eval = EVAL_NULL;
755 PL_comppad = 0;
756 PL_curpm = 0;
757 PL_curpad = 0;
758 PL_localizing = 0;
759 PL_dirty = 0;
760 PL_restartop = 0;
761#if PERL_VERSION_ATLEAST (5,10,0)
762 PL_parser = 0;
763#endif
764
765 /* recreate the die/warn hooks */
766 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
767 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
768
769 GvSV (PL_defgv) = newSV (0);
770 GvAV (PL_defgv) = coro->args; coro->args = 0;
771 GvSV (PL_errgv) = newSV (0);
772 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
773 PL_rs = newSVsv (GvSV (irsgv));
774 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
775
776 {
777 dSP;
778 LOGOP myop;
779
780 Zero (&myop, 1, LOGOP);
781 myop.op_next = Nullop;
782 myop.op_flags = OPf_WANT_VOID;
783
784 PUSHMARK (SP);
785 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
786 PUTBACK;
787 PL_op = (OP *)&myop;
788 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
789 SPAGAIN;
790 }
791
792 /* this newly created coroutine might be run on an existing cctx which most
793 * likely was suspended in set_stacklevel, called from entersub.
794 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
795 * so we ENTER here for symmetry
796 */
797 ENTER;
798}
799
800static void
801coro_destroy (pTHX_ struct coro *coro)
802{
803 if (!IN_DESTRUCT)
804 {
805 /* restore all saved variables and stuff */
806 LEAVE_SCOPE (0);
807 assert (PL_tmps_floor == -1);
808
809 /* free all temporaries */
810 FREETMPS;
811 assert (PL_tmps_ix == -1);
812
813 /* unwind all extra stacks */
814 POPSTACK_TO (PL_mainstack);
815
816 /* unwind main stack */
817 dounwind (-1);
818 }
819
820 SvREFCNT_dec (GvSV (PL_defgv));
641 SvREFCNT_dec (GvAV (PL_defgv)); 821 SvREFCNT_dec (GvAV (PL_defgv));
642 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 822 SvREFCNT_dec (GvSV (PL_errgv));
823 SvREFCNT_dec (PL_defoutgv);
824 SvREFCNT_dec (PL_rs);
825 SvREFCNT_dec (GvSV (irsgv));
643 826
644 SPAGAIN; 827 SvREFCNT_dec (PL_diehook);
828 SvREFCNT_dec (PL_warnhook);
829
830 SvREFCNT_dec (coro->saved_deffh);
831 SvREFCNT_dec (coro->throw);
645 832
646 if (ctx->stack) 833 coro_destroy_stacks (aTHX);
647 {
648 ctx->cursp = 0;
649
650 PUSHMARK(SP);
651 PUTBACK;
652 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
653
654 if (SvTRUE (ERRSV))
655 croak (NULL);
656 else
657 croak ("FATAL: CCTXT coroutine returned!");
658 }
659 else
660 {
661 UNOP myop;
662
663 PL_op = (OP *)&myop;
664
665 Zero(&myop, 1, UNOP);
666 myop.op_next = Nullop;
667 myop.op_flags = OPf_WANT_VOID;
668
669 PUSHMARK(SP);
670 XPUSHs (sub_init);
671 /*
672 * the next line is slightly wrong, as PL_op->op_next
673 * is actually being executed so we skip the first op.
674 * that doesn't matter, though, since it is only
675 * pp_nextstate and we never return...
676 * ah yes, and I don't care anyways ;)
677 */
678 PUTBACK;
679 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680 SPAGAIN;
681
682 ENTER; /* necessary e.g. for dounwind */
683 }
684} 834}
685 835
686static void 836static void
687continue_coro (void *arg) 837free_coro_mortal (pTHX)
688{ 838{
689 /* 839 if (expect_true (coro_mortal))
690 * this is a _very_ stripped down perl interpreter ;) 840 {
691 */ 841 SvREFCNT_dec (coro_mortal);
692 dTHX; 842 coro_mortal = 0;
693 Coro__State ctx = (Coro__State)arg;
694 JMPENV coro_start_env;
695
696 PL_top_env = &ctx->start_env;
697
698 ctx->cursp = 0;
699 PL_op = PL_op->op_next;
700 CALLRUNOPS(aTHX);
701
702 abort ();
703}
704
705STATIC void
706transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707{
708 dSTACKLEVEL;
709
710 if (prev != next)
711 { 843 }
712 if (next->mainstack) 844}
845
846static int
847runops_trace (pTHX)
848{
849 COP *oldcop = 0;
850 int oldcxix = -2;
851 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
852 coro_cctx *cctx = coro->cctx;
853
854 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
855 {
856 PERL_ASYNC_CHECK ();
857
858 if (cctx->flags & CC_TRACE_ALL)
713 { 859 {
714 LOCK; 860 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
715 SAVE (prev, flags);
716 LOAD (next);
717 UNLOCK;
718
719 /* mark this state as in-use */
720 next->mainstack = 0;
721 next->tmps_ix = -2;
722
723 /* stacklevel changed? if yes, grab the stack for us! */
724 if (flags & TRANSFER_SAVE_CCTXT)
725 { 861 {
726 if (!prev->stack) 862 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
727 allocate_stack (prev, 0); 863 SV **bot, **top;
728 else if (prev->cursp != stacklevel 864 AV *av = newAV (); /* return values */
729 && prev->stack->usecnt > 1) 865 SV **cb;
866 dSP;
867
868 GV *gv = CvGV (cx->blk_sub.cv);
869 SV *fullname = sv_2mortal (newSV (0));
870 if (isGV (gv))
871 gv_efullname3 (fullname, gv, 0);
872
873 bot = PL_stack_base + cx->blk_oldsp + 1;
874 top = cx->blk_gimme == G_ARRAY ? SP + 1
875 : cx->blk_gimme == G_SCALAR ? bot + 1
876 : bot;
877
878 av_extend (av, top - bot);
879 while (bot < top)
880 av_push (av, SvREFCNT_inc (*bot++));
881
882 PL_runops = RUNOPS_DEFAULT;
883 ENTER;
884 SAVETMPS;
885 EXTEND (SP, 3);
886 PUSHMARK (SP);
887 PUSHs (&PL_sv_no);
888 PUSHs (fullname);
889 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
890 PUTBACK;
891 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
892 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
893 SPAGAIN;
894 FREETMPS;
895 LEAVE;
896 PL_runops = runops_trace;
897 }
898
899 if (oldcop != PL_curcop)
900 {
901 oldcop = PL_curcop;
902
903 if (PL_curcop != &PL_compiling)
730 { 904 {
731 prev->gencnt = ++prev->stack->gencnt; 905 SV **cb;
732 prev->stack->usecnt = 1;
733 }
734 906
735 /* has our stack been invalidated? */ 907 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
736 if (next->stack && next->stack->gencnt != next->gencnt)
737 { 908 {
738 deallocate_stack (next); 909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739 allocate_stack (next, 1); 910
740 coro_create (&(next->stack->cctx), 911 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
741 continue_coro, (void *)next, 912 {
742 next->stack->sptr, labs (next->stack->ssize)); 913 runops_proc_t old_runops = PL_runops;
914 dSP;
915 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0));
917
918 if (isGV (gv))
919 gv_efullname3 (fullname, gv, 0);
920
921 PL_runops = RUNOPS_DEFAULT;
922 ENTER;
923 SAVETMPS;
924 EXTEND (SP, 3);
925 PUSHMARK (SP);
926 PUSHs (&PL_sv_yes);
927 PUSHs (fullname);
928 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
929 PUTBACK;
930 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
931 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
932 SPAGAIN;
933 FREETMPS;
934 LEAVE;
935 PL_runops = runops_trace;
936 }
937
938 oldcxix = cxstack_ix;
743 } 939 }
744 940
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 941 if (cctx->flags & CC_TRACE_LINE)
746 prev->cursp = stacklevel;
747 /* don't add any code here */
748 }
749 else
750 next->cursp = stacklevel;
751 }
752 else if (next->tmps_ix == -2)
753 croak ("tried to transfer to running coroutine");
754 else
755 {
756 LOCK;
757 SAVE (prev, -1); /* first get rid of the old state */
758 UNLOCK;
759
760 if (flags & TRANSFER_SAVE_CCTXT)
761 {
762 if (!prev->stack)
763 allocate_stack (prev, 0);
764
765 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766 { 942 {
767 PL_top_env = &next->start_env; 943 dSP;
768 944
769 setup_coro (next); 945 PL_runops = RUNOPS_DEFAULT;
770 next->cursp = stacklevel; 946 ENTER;
771 947 SAVETMPS;
772 prev->stack->refcnt++; 948 EXTEND (SP, 3);
773 prev->stack->usecnt++; 949 PL_runops = RUNOPS_DEFAULT;
774 next->stack = prev->stack; 950 PUSHMARK (SP);
775 next->gencnt = prev->gencnt; 951 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
952 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
953 PUTBACK;
954 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
955 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
956 SPAGAIN;
957 FREETMPS;
958 LEAVE;
959 PL_runops = runops_trace;
776 } 960 }
777 else
778 {
779 assert (!next->stack);
780 allocate_stack (next, 1);
781 coro_create (&(next->stack->cctx),
782 setup_coro, (void *)next,
783 next->stack->sptr, labs (next->stack->ssize));
784 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785 prev->cursp = stacklevel;
786 /* don't add any code here */
787 } 961 }
788 } 962 }
963 }
964 }
965
966 TAINT_NOT;
967 return 0;
968}
969
970/* inject a fake call to Coro::State::_cctx_init into the execution */
971/* _cctx_init should be careful, as it could be called at almost any time */
972/* during execution of a perl program */
973static void NOINLINE
974cctx_prepare (pTHX_ coro_cctx *cctx)
975{
976 dSP;
977 LOGOP myop;
978
979 PL_top_env = &PL_start_env;
980
981 if (cctx->flags & CC_TRACE)
982 PL_runops = runops_trace;
983
984 Zero (&myop, 1, LOGOP);
985 myop.op_next = PL_op;
986 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
987
988 PUSHMARK (SP);
989 EXTEND (SP, 2);
990 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
991 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
992 PUTBACK;
993 PL_op = (OP *)&myop;
994 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
995 SPAGAIN;
996}
997
998/*
999 * this is a _very_ stripped down perl interpreter ;)
1000 */
1001static void
1002cctx_run (void *arg)
1003{
1004 dTHX;
1005
1006 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1007 UNLOCK;
1008
1009 /* we now skip the entersub that lead to transfer() */
1010 PL_op = PL_op->op_next;
1011
1012 /* inject a fake subroutine call to cctx_init */
1013 cctx_prepare (aTHX_ (coro_cctx *)arg);
1014
1015 /* somebody or something will hit me for both perl_run and PL_restartop */
1016 PL_restartop = PL_op;
1017 perl_run (PL_curinterp);
1018
1019 /*
1020 * If perl-run returns we assume exit() was being called or the coro
1021 * fell off the end, which seems to be the only valid (non-bug)
1022 * reason for perl_run to return. We try to exit by jumping to the
1023 * bootstrap-time "top" top_env, as we cannot restore the "main"
1024 * coroutine as Coro has no such concept
1025 */
1026 PL_top_env = main_top_env;
1027 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1028}
1029
1030static coro_cctx *
1031cctx_new ()
1032{
1033 coro_cctx *cctx;
1034 void *stack_start;
1035 size_t stack_size;
1036
1037 ++cctx_count;
1038
1039 Newz (0, cctx, 1, coro_cctx);
1040
1041#if HAVE_MMAP
1042 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1043 /* mmap supposedly does allocate-on-write for us */
1044 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1045
1046 if (cctx->sptr != (void *)-1)
1047 {
1048# if CORO_STACKGUARD
1049 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1050# endif
1051 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1052 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1053 cctx->flags |= CC_MAPPED;
1054 }
1055 else
1056#endif
1057 {
1058 cctx->ssize = coro_stacksize * (long)sizeof (long);
1059 New (0, cctx->sptr, coro_stacksize, long);
1060
1061 if (!cctx->sptr)
1062 {
1063 perror ("FATAL: unable to allocate stack for coroutine");
1064 _exit (EXIT_FAILURE);
1065 }
1066
1067 stack_start = cctx->sptr;
1068 stack_size = cctx->ssize;
1069 }
1070
1071 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1072 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1073
1074 return cctx;
1075}
1076
1077static void
1078cctx_destroy (coro_cctx *cctx)
1079{
1080 if (!cctx)
1081 return;
1082
1083 --cctx_count;
1084
1085#if CORO_USE_VALGRIND
1086 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1087#endif
1088
1089#if HAVE_MMAP
1090 if (cctx->flags & CC_MAPPED)
1091 munmap (cctx->sptr, cctx->ssize);
1092 else
1093#endif
1094 Safefree (cctx->sptr);
1095
1096 Safefree (cctx);
1097}
1098
1099/* wether this cctx should be destructed */
1100#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1101
1102static coro_cctx *
1103cctx_get (pTHX)
1104{
1105 while (expect_true (cctx_first))
1106 {
1107 coro_cctx *cctx = cctx_first;
1108 cctx_first = cctx->next;
1109 --cctx_idle;
1110
1111 if (expect_true (!CCTX_EXPIRED (cctx)))
1112 return cctx;
1113
1114 cctx_destroy (cctx);
1115 }
1116
1117 return cctx_new ();
1118}
1119
1120static void
1121cctx_put (coro_cctx *cctx)
1122{
1123 /* free another cctx if overlimit */
1124 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1125 {
1126 coro_cctx *first = cctx_first;
1127 cctx_first = first->next;
1128 --cctx_idle;
1129
1130 cctx_destroy (first);
1131 }
1132
1133 ++cctx_idle;
1134 cctx->next = cctx_first;
1135 cctx_first = cctx;
1136}
1137
1138/** coroutine switching *****************************************************/
1139
1140static void
1141transfer_check (pTHX_ struct coro *prev, struct coro *next)
1142{
1143 if (expect_true (prev != next))
1144 {
1145 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1146 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1147
1148 if (expect_false (next->flags & CF_RUNNING))
1149 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1150
1151 if (expect_false (next->flags & CF_DESTROYED))
1152 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1153
1154#if !PERL_VERSION_ATLEAST (5,10,0)
1155 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1156 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1157#endif
1158 }
1159}
1160
1161/* always use the TRANSFER macro */
1162static void NOINLINE
1163transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1164{
1165 dSTACKLEVEL;
1166 static volatile int has_throw;
1167
1168 /* sometimes transfer is only called to set idle_sp */
1169 if (expect_false (!next))
1170 {
1171 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1172 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1173 }
1174 else if (expect_true (prev != next))
1175 {
1176 coro_cctx *prev__cctx;
1177
1178 if (expect_false (prev->flags & CF_NEW))
1179 {
1180 /* create a new empty context */
1181 Newz (0, prev->cctx, 1, coro_cctx);
1182 prev->flags &= ~CF_NEW;
1183 prev->flags |= CF_RUNNING;
1184 }
1185
1186 prev->flags &= ~CF_RUNNING;
1187 next->flags |= CF_RUNNING;
1188
1189 LOCK;
1190
1191 /* first get rid of the old state */
1192 save_perl (aTHX_ prev);
1193
1194 if (expect_false (next->flags & CF_NEW))
1195 {
1196 /* need to start coroutine */
1197 next->flags &= ~CF_NEW;
1198 /* setup coroutine call */
1199 coro_setup (aTHX_ next);
1200 }
789 else 1201 else
1202 load_perl (aTHX_ next);
1203
1204 prev__cctx = prev->cctx;
1205
1206 /* possibly "free" the cctx */
1207 if (expect_true (
1208 prev__cctx->idle_sp == STACKLEVEL
1209 && !(prev__cctx->flags & CC_TRACE)
1210 && !force_cctx
1211 ))
1212 {
1213 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1214 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1215
1216 prev->cctx = 0;
1217
1218 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1219 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1220 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1221 if (!next->cctx)
1222 next->cctx = cctx_get (aTHX);
1223
1224 cctx_put (prev__cctx);
1225 }
1226
1227 ++next->usecount;
1228
1229 if (expect_true (!next->cctx))
1230 next->cctx = cctx_get (aTHX);
1231
1232 has_throw = !!next->throw;
1233
1234 if (expect_false (prev__cctx != next->cctx))
1235 {
1236 prev__cctx->top_env = PL_top_env;
1237 PL_top_env = next->cctx->top_env;
1238 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1239 }
1240
1241 free_coro_mortal (aTHX);
1242 UNLOCK;
1243
1244 if (expect_false (has_throw))
1245 {
1246 struct coro *coro = SvSTATE (coro_current);
1247
1248 if (coro->throw)
790 { 1249 {
1250 SV *exception = coro->throw;
1251 coro->throw = 0;
1252 sv_setsv (ERRSV, exception);
791 setup_coro (next); 1253 croak (0);
792 next->cursp = stacklevel;
793 } 1254 }
794 } 1255 }
795 } 1256 }
1257}
1258
1259struct transfer_args
1260{
1261 struct coro *prev, *next;
1262};
1263
1264#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1265#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1266
1267/** high level stuff ********************************************************/
1268
1269static int
1270coro_state_destroy (pTHX_ struct coro *coro)
1271{
1272 if (coro->flags & CF_DESTROYED)
1273 return 0;
1274
1275 coro->flags |= CF_DESTROYED;
1276
1277 if (coro->flags & CF_READY)
1278 {
1279 /* reduce nready, as destroying a ready coro effectively unreadies it */
1280 /* alternative: look through all ready queues and remove the coro */
1281 LOCK;
1282 --coro_nready;
1283 UNLOCK;
1284 }
1285 else
1286 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1287
1288 if (coro->mainstack && coro->mainstack != main_mainstack)
1289 {
1290 struct coro temp;
1291
1292 if (coro->flags & CF_RUNNING)
1293 croak ("FATAL: tried to destroy currently running coroutine");
1294
1295 save_perl (aTHX_ &temp);
1296 load_perl (aTHX_ coro);
1297
1298 coro_destroy (aTHX_ coro);
1299
1300 load_perl (aTHX_ &temp);
1301
1302 coro->slot = 0;
1303 }
1304
1305 cctx_destroy (coro->cctx);
1306 SvREFCNT_dec (coro->args);
1307
1308 if (coro->next) coro->next->prev = coro->prev;
1309 if (coro->prev) coro->prev->next = coro->next;
1310 if (coro == coro_first) coro_first = coro->next;
1311
1312 return 1;
1313}
1314
1315static int
1316coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1317{
1318 struct coro *coro = (struct coro *)mg->mg_ptr;
1319 mg->mg_ptr = 0;
1320
1321 coro->hv = 0;
1322
1323 if (--coro->refcnt < 0)
1324 {
1325 coro_state_destroy (aTHX_ coro);
1326 Safefree (coro);
1327 }
1328
1329 return 0;
1330}
1331
1332static int
1333coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1334{
1335 struct coro *coro = (struct coro *)mg->mg_ptr;
1336
1337 ++coro->refcnt;
1338
1339 return 0;
1340}
1341
1342static MGVTBL coro_state_vtbl = {
1343 0, 0, 0, 0,
1344 coro_state_free,
1345 0,
1346#ifdef MGf_DUP
1347 coro_state_dup,
1348#else
1349# define MGf_DUP 0
1350#endif
1351};
1352
1353static void
1354prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1355{
1356 ta->prev = SvSTATE (prev_sv);
1357 ta->next = SvSTATE (next_sv);
1358 TRANSFER_CHECK (*ta);
1359}
1360
1361static void
1362api_transfer (SV *prev_sv, SV *next_sv)
1363{
1364 dTHX;
1365 struct transfer_args ta;
1366
1367 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1368 TRANSFER (ta, 1);
1369}
1370
1371/** Coro ********************************************************************/
1372
1373static void
1374coro_enq (pTHX_ SV *coro_sv)
1375{
1376 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1377}
1378
1379static SV *
1380coro_deq (pTHX)
1381{
1382 int prio;
1383
1384 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1385 if (AvFILLp (coro_ready [prio]) >= 0)
1386 return av_shift (coro_ready [prio]);
1387
1388 return 0;
1389}
1390
1391static int
1392api_ready (SV *coro_sv)
1393{
1394 dTHX;
1395 struct coro *coro;
1396 SV *sv_hook;
1397 void (*xs_hook)(void);
1398
1399 if (SvROK (coro_sv))
1400 coro_sv = SvRV (coro_sv);
1401
1402 coro = SvSTATE (coro_sv);
1403
1404 if (coro->flags & CF_READY)
1405 return 0;
1406
1407 coro->flags |= CF_READY;
796 1408
797 LOCK; 1409 LOCK;
798 if (coro_mortal) 1410
799 { 1411 sv_hook = coro_nready ? 0 : coro_readyhook;
800 SvREFCNT_dec (coro_mortal); 1412 xs_hook = coro_nready ? 0 : coroapi.readyhook;
801 coro_mortal = 0; 1413
802 } 1414 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1415 ++coro_nready;
1416
803 UNLOCK; 1417 UNLOCK;
804} 1418
1419 if (sv_hook)
1420 {
1421 dSP;
805 1422
806#define SV_CORO(sv,func) \ 1423 ENTER;
807 do { \ 1424 SAVETMPS;
808 if (SvROK (sv)) \
809 sv = SvRV (sv); \
810 \
811 if (SvTYPE (sv) == SVt_PVHV) \
812 { \
813 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814 \
815 if (!he) \
816 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817 \
818 (sv) = SvRV (HeVAL(he)); \
819 } \
820 \
821 /* must also be changed inside Coro::Cont::yield */ \
822 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824 \
825 } while(0)
826 1425
827#define SvSTATE(sv) (struct coro *)SvIV (sv) 1426 PUSHMARK (SP);
1427 PUTBACK;
1428 call_sv (sv_hook, G_DISCARD);
1429 SPAGAIN;
1430
1431 FREETMPS;
1432 LEAVE;
1433 }
1434
1435 if (xs_hook)
1436 xs_hook ();
1437
1438 return 1;
1439}
1440
1441static int
1442api_is_ready (SV *coro_sv)
1443{
1444 dTHX;
1445 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1446}
828 1447
829static void 1448static void
830api_transfer(pTHX_ SV *prev, SV *next, int flags) 1449prepare_schedule (pTHX_ struct transfer_args *ta)
831{ 1450{
832 SV_CORO (prev, "Coro::transfer"); 1451 SV *prev_sv, *next_sv;
833 SV_CORO (next, "Coro::transfer");
834 1452
835 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1453 for (;;)
836} 1454 {
1455 LOCK;
1456 next_sv = coro_deq (aTHX);
837 1457
838/** Coro ********************************************************************/ 1458 /* nothing to schedule: call the idle handler */
1459 if (expect_false (!next_sv))
1460 {
1461 dSP;
1462 UNLOCK;
839 1463
840#define PRIO_MAX 3 1464 ENTER;
841#define PRIO_HIGH 1 1465 SAVETMPS;
842#define PRIO_NORMAL 0
843#define PRIO_LOW -1
844#define PRIO_IDLE -3
845#define PRIO_MIN -4
846 1466
847/* for Coro.pm */ 1467 PUSHMARK (SP);
848static GV *coro_current, *coro_idle; 1468 PUTBACK;
849static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1469 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
850static int coro_nready; 1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 continue;
1475 }
1476
1477 ta->next = SvSTATE (next_sv);
1478
1479 /* cannot transfer to destroyed coros, skip and look for next */
1480 if (expect_false (ta->next->flags & CF_DESTROYED))
1481 {
1482 UNLOCK;
1483 SvREFCNT_dec (next_sv);
1484 /* coro_nready is already taken care of by destroy */
1485 continue;
1486 }
1487
1488 --coro_nready;
1489 UNLOCK;
1490 break;
1491 }
1492
1493 /* free this only after the transfer */
1494 prev_sv = SvRV (coro_current);
1495 ta->prev = SvSTATE (prev_sv);
1496 TRANSFER_CHECK (*ta);
1497 assert (ta->next->flags & CF_READY);
1498 ta->next->flags &= ~CF_READY;
1499 SvRV_set (coro_current, next_sv);
1500
1501 LOCK;
1502 free_coro_mortal (aTHX);
1503 coro_mortal = prev_sv;
1504 UNLOCK;
1505}
851 1506
852static void 1507static void
853coro_enq (pTHX_ SV *sv) 1508prepare_cede (pTHX_ struct transfer_args *ta)
854{ 1509{
855 if (SvTYPE (sv) == SVt_PVHV) 1510 api_ready (coro_current);
856 { 1511 prepare_schedule (aTHX_ ta);
857 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1512}
858 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859 1513
860 prio = prio > PRIO_MAX ? PRIO_MAX 1514static int
861 : prio < PRIO_MIN ? PRIO_MIN 1515prepare_cede_notself (pTHX_ struct transfer_args *ta)
862 : prio; 1516{
863 1517 if (coro_nready)
864 av_push (coro_ready [prio - PRIO_MIN], sv); 1518 {
865 coro_nready++; 1519 SV *prev = SvRV (coro_current);
866 1520 prepare_schedule (aTHX_ ta);
1521 api_ready (prev);
867 return; 1522 return 1;
868 }
869
870 croak ("Coro::ready tried to enqueue something that is not a coroutine");
871}
872
873static SV *
874coro_deq (pTHX_ int min_prio)
875{
876 int prio = PRIO_MAX - PRIO_MIN;
877
878 min_prio -= PRIO_MIN;
879 if (min_prio < 0)
880 min_prio = 0;
881
882 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883 if (av_len (coro_ready[prio]) >= 0)
884 {
885 coro_nready--;
886 return av_shift (coro_ready[prio]);
887 } 1523 }
888 1524 else
889 return 0; 1525 return 0;
890}
891
892static void
893api_ready (SV *coro)
894{
895 dTHX;
896
897 if (SvROK (coro))
898 coro = SvRV (coro);
899
900 LOCK;
901 coro_enq (aTHX_ SvREFCNT_inc (coro));
902 UNLOCK;
903} 1526}
904 1527
905static void 1528static void
906api_schedule (void) 1529api_schedule (void)
907{ 1530{
908 dTHX; 1531 dTHX;
1532 struct transfer_args ta;
909 1533
910 SV *prev, *next; 1534 prepare_schedule (aTHX_ &ta);
1535 TRANSFER (ta, 1);
1536}
911 1537
912 LOCK; 1538static int
1539api_cede (void)
1540{
1541 dTHX;
1542 struct transfer_args ta;
913 1543
914 prev = SvRV (GvSV (coro_current)); 1544 prepare_cede (aTHX_ &ta);
915 next = coro_deq (aTHX_ PRIO_MIN);
916 1545
917 if (!next) 1546 if (expect_true (ta.prev != ta.next))
918 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1547 {
1548 TRANSFER (ta, 1);
1549 return 1;
1550 }
1551 else
1552 return 0;
1553}
919 1554
920 /* free this only after the transfer */ 1555static int
921 coro_mortal = prev; 1556api_cede_notself (void)
922 SV_CORO (prev, "Coro::schedule"); 1557{
1558 dTHX;
1559 struct transfer_args ta;
923 1560
924 SvRV (GvSV (coro_current)) = next; 1561 if (prepare_cede_notself (aTHX_ &ta))
925 1562 {
926 SV_CORO (next, "Coro::schedule"); 1563 TRANSFER (ta, 1);
927 1564 return 1;
928 UNLOCK; 1565 }
929 1566 else
930 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1567 return 0;
931 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932} 1568}
933 1569
934static void 1570static void
935api_cede (void) 1571api_trace (SV *coro_sv, int flags)
936{ 1572{
937 dTHX; 1573 dTHX;
1574 struct coro *coro = SvSTATE (coro_sv);
938 1575
939 LOCK; 1576 if (flags & CC_TRACE)
940 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1577 {
941 UNLOCK; 1578 if (!coro->cctx)
1579 coro->cctx = cctx_new ();
1580 else if (!(coro->cctx->flags & CC_TRACE))
1581 croak ("cannot enable tracing on coroutine with custom stack");
942 1582
943 api_schedule (); 1583 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
944} 1584 }
1585 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1586 {
1587 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
945 1588
1589 if (coro->flags & CF_RUNNING)
1590 PL_runops = RUNOPS_DEFAULT;
1591 else
1592 coro->slot->runops = RUNOPS_DEFAULT;
1593 }
1594}
1595
946MODULE = Coro::State PACKAGE = Coro::State 1596MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
947 1597
948PROTOTYPES: ENABLE 1598PROTOTYPES: DISABLE
949 1599
950BOOT: 1600BOOT:
951{ /* {} necessary for stoopid perl-5.6.x */ 1601{
952#ifdef USE_ITHREADS 1602#ifdef USE_ITHREADS
953 MUTEX_INIT (&coro_mutex); 1603 MUTEX_INIT (&coro_mutex);
954#endif 1604#endif
1605 BOOT_PAGESIZE;
955 1606
956 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1607 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
957 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1608 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1609
1610 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1611 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1612 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1613 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1614
1615 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1616 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1617 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1618
958 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1619 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959 1620
960 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1621 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
961 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1622 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
962 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1623 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
963 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1624 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
964 1625
965 main_mainstack = PL_mainstack; 1626 main_mainstack = PL_mainstack;
1627 main_top_env = PL_top_env;
966 1628
1629 while (main_top_env->je_prev)
1630 main_top_env = main_top_env->je_prev;
1631
967 coroapi.ver = CORO_API_VERSION; 1632 coroapi.ver = CORO_API_VERSION;
1633 coroapi.rev = CORO_API_REVISION;
968 coroapi.transfer = api_transfer; 1634 coroapi.transfer = api_transfer;
969}
970 1635
971Coro::State 1636 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972_newprocess(args) 1637}
973 SV * args 1638
974 PROTOTYPE: $ 1639SV *
1640new (char *klass, ...)
975 CODE: 1641 CODE:
976 Coro__State coro; 1642{
1643 struct coro *coro;
1644 MAGIC *mg;
1645 HV *hv;
1646 int i;
977 1647
978 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979 croak ("Coro::State::_newprocess expects an arrayref");
980
981 Newz (0, coro, 1, struct coro); 1648 Newz (0, coro, 1, struct coro);
1649 coro->args = newAV ();
1650 coro->flags = CF_NEW;
982 1651
983 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1652 if (coro_first) coro_first->prev = coro;
984 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1653 coro->next = coro_first;
985 /*coro->stack = 0;*/ 1654 coro_first = coro;
986 1655
987 /* same as JMPENV_BOOTSTRAP */ 1656 coro->hv = hv = newHV ();
988 /* we might be able to recycle start_env, but safe is safe */ 1657 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
989 /*Zero(&coro->start_env, 1, JMPENV);*/ 1658 mg->mg_flags |= MGf_DUP;
990 coro->start_env.je_ret = -1; 1659 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991 coro->start_env.je_mustcatch = TRUE;
992 1660
993 RETVAL = coro; 1661 av_extend (coro->args, items - 1);
1662 for (i = 1; i < items; i++)
1663 av_push (coro->args, newSVsv (ST (i)));
1664}
994 OUTPUT: 1665 OUTPUT:
995 RETVAL 1666 RETVAL
996 1667
1668# these not obviously related functions are all rolled into the same xs
1669# function to increase chances that they all will call transfer with the same
1670# stack offset
997void 1671void
998transfer(prev, next, flags) 1672_set_stacklevel (...)
999 SV *prev 1673 ALIAS:
1000 SV *next 1674 Coro::State::transfer = 1
1001 int flags 1675 Coro::schedule = 2
1002 PROTOTYPE: @ 1676 Coro::cede = 3
1677 Coro::cede_notself = 4
1003 CODE: 1678 CODE:
1679{
1680 struct transfer_args ta;
1681
1004 PUTBACK; 1682 PUTBACK;
1005 SV_CORO (next, "Coro::transfer"); 1683 switch (ix)
1006 SV_CORO (prev, "Coro::transfer"); 1684 {
1007 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1685 case 0:
1686 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1687 ta.next = 0;
1688 break;
1689
1690 case 1:
1691 if (items != 2)
1692 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1693
1694 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1695 break;
1696
1697 case 2:
1698 prepare_schedule (aTHX_ &ta);
1699 break;
1700
1701 case 3:
1702 prepare_cede (aTHX_ &ta);
1703 break;
1704
1705 case 4:
1706 if (!prepare_cede_notself (aTHX_ &ta))
1707 XSRETURN_EMPTY;
1708
1709 break;
1710 }
1008 SPAGAIN; 1711 SPAGAIN;
1009 1712
1713 BARRIER;
1714 PUTBACK;
1715 TRANSFER (ta, 0);
1716 SPAGAIN; /* might be the sp of a different coroutine now */
1717 /* be extra careful not to ever do anything after TRANSFER */
1718}
1719
1720bool
1721_destroy (SV *coro_sv)
1722 CODE:
1723 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1724 OUTPUT:
1725 RETVAL
1726
1010void 1727void
1011DESTROY(coro)
1012 Coro::State coro
1013 CODE:
1014
1015 if (coro->mainstack && coro->mainstack != main_mainstack)
1016 {
1017 struct coro temp;
1018
1019 PUTBACK;
1020 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1021 LOAD(aTHX_ coro);
1022 SPAGAIN;
1023
1024 destroy_stacks (aTHX);
1025
1026 LOAD((&temp)); /* this will get rid of defsv etc.. */
1027 SPAGAIN;
1028
1029 coro->mainstack = 0;
1030 }
1031
1032 deallocate_stack (coro);
1033 SvREFCNT_dec (coro->args);
1034 Safefree (coro);
1035
1036void
1037_exit(code) 1728_exit (int code)
1038 int code
1039 PROTOTYPE: $ 1729 PROTOTYPE: $
1040 CODE: 1730 CODE:
1041 _exit (code); 1731 _exit (code);
1042 1732
1043MODULE = Coro::State PACKAGE = Coro::Cont 1733int
1734cctx_stacksize (int new_stacksize = 0)
1735 CODE:
1736 RETVAL = coro_stacksize;
1737 if (new_stacksize)
1738 coro_stacksize = new_stacksize;
1739 OUTPUT:
1740 RETVAL
1044 1741
1045# this is slightly dirty (should expose a c-level api) 1742int
1743cctx_count ()
1744 CODE:
1745 RETVAL = cctx_count;
1746 OUTPUT:
1747 RETVAL
1748
1749int
1750cctx_idle ()
1751 CODE:
1752 RETVAL = cctx_idle;
1753 OUTPUT:
1754 RETVAL
1046 1755
1047void 1756void
1048yield(...) 1757list ()
1049 PROTOTYPE: @ 1758 PPCODE:
1759{
1760 struct coro *coro;
1761 for (coro = coro_first; coro; coro = coro->next)
1762 if (coro->hv)
1763 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1764}
1765
1766void
1767call (Coro::State coro, SV *coderef)
1768 ALIAS:
1769 eval = 1
1770 CODE:
1771{
1772 if (coro->mainstack)
1773 {
1774 struct coro temp;
1775
1776 if (!(coro->flags & CF_RUNNING))
1777 {
1778 PUTBACK;
1779 save_perl (aTHX_ &temp);
1780 load_perl (aTHX_ coro);
1781 }
1782
1783 {
1784 dSP;
1785 ENTER;
1786 SAVETMPS;
1787 PUTBACK;
1788 PUSHSTACK;
1789 PUSHMARK (SP);
1790
1791 if (ix)
1792 eval_sv (coderef, 0);
1793 else
1794 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1795
1796 POPSTACK;
1797 SPAGAIN;
1798 FREETMPS;
1799 LEAVE;
1800 PUTBACK;
1801 }
1802
1803 if (!(coro->flags & CF_RUNNING))
1804 {
1805 save_perl (aTHX_ coro);
1806 load_perl (aTHX_ &temp);
1807 SPAGAIN;
1808 }
1809 }
1810}
1811
1812SV *
1813is_ready (Coro::State coro)
1814 PROTOTYPE: $
1815 ALIAS:
1816 is_ready = CF_READY
1817 is_running = CF_RUNNING
1818 is_new = CF_NEW
1819 is_destroyed = CF_DESTROYED
1820 CODE:
1821 RETVAL = boolSV (coro->flags & ix);
1822 OUTPUT:
1823 RETVAL
1824
1825void
1826api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1827
1828SV *
1829has_cctx (Coro::State coro)
1830 PROTOTYPE: $
1831 CODE:
1832 RETVAL = boolSV (!!coro->cctx);
1833 OUTPUT:
1834 RETVAL
1835
1836int
1837is_traced (Coro::State coro)
1838 PROTOTYPE: $
1839 CODE:
1840 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1841 OUTPUT:
1842 RETVAL
1843
1844IV
1845rss (Coro::State coro)
1846 PROTOTYPE: $
1847 ALIAS:
1848 usecount = 1
1050 CODE: 1849 CODE:
1051 static SV *returnstk; 1850 switch (ix)
1052 SV *sv; 1851 {
1053 AV *defav = GvAV (PL_defgv); 1852 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1054 struct coro *prev, *next; 1853 case 1: RETVAL = coro->usecount; break;
1854 }
1855 OUTPUT:
1856 RETVAL
1055 1857
1056 if (!returnstk) 1858void
1057 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE)); 1859force_cctx ()
1058 1860 CODE:
1059 /* set up @_ -- ugly */ 1861 struct coro *coro = SvSTATE (coro_current);
1060 av_clear (defav); 1862 coro->cctx->idle_sp = 0;
1061 av_fill (defav, items - 1);
1062 while (items--)
1063 av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066 sv = av_pop ((AV *)SvRV (returnstk));
1067 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069 SvREFCNT_dec (sv);
1070
1071 transfer(aTHX_ prev, next, 0);
1072 1863
1073MODULE = Coro::State PACKAGE = Coro 1864MODULE = Coro::State PACKAGE = Coro
1074 1865
1075# this is slightly dirty (should expose a c-level api)
1076
1077BOOT: 1866BOOT:
1078{ 1867{
1079 int i; 1868 int i;
1869
1870 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1871 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1872 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1873
1874 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1875 SvREADONLY_on (coro_current);
1876
1080 HV *stash = gv_stashpv ("Coro", TRUE); 1877 coro_stash = gv_stashpv ("Coro", TRUE);
1081 1878
1082 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1879 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1880 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1881 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1882 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1883 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1884 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088
1089 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091 1885
1092 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1886 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093 coro_ready[i] = newAV (); 1887 coro_ready[i] = newAV ();
1094 1888
1095 { 1889 {
1096 SV *sv = perl_get_sv("Coro::API", 1); 1890 SV *sv = perl_get_sv ("Coro::API", TRUE);
1891 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1097 1892
1098 coroapi.schedule = api_schedule; 1893 coroapi.schedule = api_schedule;
1099 coroapi.cede = api_cede; 1894 coroapi.cede = api_cede;
1895 coroapi.cede_notself = api_cede_notself;
1100 coroapi.ready = api_ready; 1896 coroapi.ready = api_ready;
1897 coroapi.is_ready = api_is_ready;
1101 coroapi.nready = &coro_nready; 1898 coroapi.nready = &coro_nready;
1102 coroapi.current = coro_current; 1899 coroapi.current = coro_current;
1103 1900
1104 GCoroAPI = &coroapi; 1901 GCoroAPI = &coroapi;
1105 sv_setiv(sv, (IV)&coroapi); 1902 sv_setiv (sv, (IV)&coroapi);
1106 SvREADONLY_on(sv); 1903 SvREADONLY_on (sv);
1107 } 1904 }
1108} 1905}
1109 1906
1110#if !PERL_MICRO
1111
1112void 1907void
1113ready(self) 1908_set_current (SV *current)
1114 SV * self
1115 PROTOTYPE: $ 1909 PROTOTYPE: $
1116 CODE: 1910 CODE:
1117 api_ready (self); 1911 SvREFCNT_dec (SvRV (coro_current));
1912 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1118 1913
1119#endif 1914void
1915_set_readyhook (SV *hook)
1916 PROTOTYPE: $
1917 CODE:
1918 LOCK;
1919 SvREFCNT_dec (coro_readyhook);
1920 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1921 UNLOCK;
1120 1922
1121int 1923int
1924prio (Coro::State coro, int newprio = 0)
1925 ALIAS:
1926 nice = 1
1927 CODE:
1928{
1929 RETVAL = coro->prio;
1930
1931 if (items > 1)
1932 {
1933 if (ix)
1934 newprio = coro->prio - newprio;
1935
1936 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1937 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1938
1939 coro->prio = newprio;
1940 }
1941}
1942 OUTPUT:
1943 RETVAL
1944
1945SV *
1946ready (SV *self)
1947 PROTOTYPE: $
1948 CODE:
1949 RETVAL = boolSV (api_ready (self));
1950 OUTPUT:
1951 RETVAL
1952
1953int
1122nready(...) 1954nready (...)
1123 PROTOTYPE: 1955 PROTOTYPE:
1124 CODE: 1956 CODE:
1125 RETVAL = coro_nready; 1957 RETVAL = coro_nready;
1126 OUTPUT: 1958 OUTPUT:
1127 RETVAL 1959 RETVAL
1128 1960
1129void 1961void
1130schedule(...) 1962throw (Coro::State self, SV *throw = &PL_sv_undef)
1963 PROTOTYPE: $;$
1964 CODE:
1965 SvREFCNT_dec (self->throw);
1966 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1967
1968void
1969swap_defsv (Coro::State self)
1131 PROTOTYPE: 1970 PROTOTYPE: $
1971 ALIAS:
1972 swap_defav = 1
1973 CODE:
1974 if (!self->slot)
1975 croak ("cannot swap state with coroutine that has no saved state");
1976 else
1977 {
1978 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1979 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1980
1981 SV *tmp = *src; *src = *dst; *dst = tmp;
1982 }
1983
1984# for async_pool speedup
1985void
1986_pool_1 (SV *cb)
1132 CODE: 1987 CODE:
1133 api_schedule (); 1988{
1989 struct coro *coro = SvSTATE (coro_current);
1990 HV *hv = (HV *)SvRV (coro_current);
1991 AV *defav = GvAV (PL_defgv);
1992 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1993 AV *invoke_av;
1994 int i, len;
1995
1996 if (!invoke)
1997 {
1998 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1999 croak ("\3async_pool terminate\2\n");
2000 }
2001
2002 SvREFCNT_dec (coro->saved_deffh);
2003 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2004
2005 hv_store (hv, "desc", sizeof ("desc") - 1,
2006 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2007
2008 invoke_av = (AV *)SvRV (invoke);
2009 len = av_len (invoke_av);
2010
2011 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2012
2013 if (len > 0)
2014 {
2015 av_fill (defav, len - 1);
2016 for (i = 0; i < len; ++i)
2017 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2018 }
2019
2020 SvREFCNT_dec (invoke);
2021}
1134 2022
1135void 2023void
1136cede(...) 2024_pool_2 (SV *cb)
1137 PROTOTYPE:
1138 CODE: 2025 CODE:
2026{
2027 struct coro *coro = SvSTATE (coro_current);
2028
2029 sv_setsv (cb, &PL_sv_undef);
2030
2031 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2032 coro->saved_deffh = 0;
2033
2034 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2035 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2036 {
2037 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2038 croak ("\3async_pool terminate\2\n");
2039 }
2040
2041 av_clear (GvAV (PL_defgv));
2042 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2043 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2044
2045 coro->prio = 0;
2046
2047 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2048 api_trace (coro_current, 0);
2049
2050 av_push (av_async_pool, newSVsv (coro_current));
2051}
2052
2053
2054MODULE = Coro::State PACKAGE = Coro::AIO
2055
2056SV *
2057_get_state ()
2058 CODE:
2059{
2060 struct io_state *data;
2061
2062 RETVAL = newSV (sizeof (struct io_state));
2063 data = (struct io_state *)SvPVX (RETVAL);
2064 SvCUR_set (RETVAL, sizeof (struct io_state));
2065 SvPOK_only (RETVAL);
2066
2067 data->errorno = errno;
2068 data->laststype = PL_laststype;
2069 data->laststatval = PL_laststatval;
2070 data->statcache = PL_statcache;
2071}
2072 OUTPUT:
2073 RETVAL
2074
2075void
2076_set_state (char *data_)
2077 PROTOTYPE: $
2078 CODE:
2079{
2080 struct io_state *data = (void *)data_;
2081
2082 errno = data->errorno;
2083 PL_laststype = data->laststype;
2084 PL_laststatval = data->laststatval;
2085 PL_statcache = data->statcache;
2086}
2087
2088
2089MODULE = Coro::State PACKAGE = Coro::AnyEvent
2090
2091BOOT:
2092 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2093
2094SV *
2095_schedule (...)
2096 PROTOTYPE: @
2097 CODE:
2098{
2099 static int incede;
2100
1139 api_cede (); 2101 api_cede_notself ();
1140 2102
2103 ++incede;
2104 while (coro_nready >= incede && api_cede ())
2105 ;
2106
2107 sv_setsv (sv_activity, &PL_sv_undef);
2108 if (coro_nready >= incede)
2109 {
2110 PUSHMARK (SP);
2111 PUTBACK;
2112 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2113 SPAGAIN;
2114 }
2115
2116 --incede;
2117}
2118

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