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Comparing Coro/Coro/State.xs (file contents):
Revision 1.57 by pcg, Thu Apr 22 04:14:49 2004 UTC vs.
Revision 1.264 by root, Fri Nov 14 02:29:09 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"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#if PATCHLEVEL < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 63# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
12# endif 65# endif
13# ifndef call_sv 66# ifndef call_sv
14# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 78# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
27# endif 80# endif
28#endif 81#endif
29 82
30#include "libcoro/coro.c" 83/* 5.11 */
31 84#ifndef CxHASARGS
32#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
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 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
122#define STACKLEVEL ((void *)&stacklevel)
123
124#define IN_DESTRUCT (PL_main_cv == Nullcv)
125
126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
130#else
131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
138
139#define NOINLINE attribute ((noinline))
140
141#include "CoroAPI.h"
142
143#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
43# endif 150# endif
44#endif
45 151
46#define SUB_INIT "Coro::State::initialize"
47#define UCORO_STATE "_coro_state"
48
49/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53
54#define IN_DESTRUCT (PL_main_cv == Nullcv)
55
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 152#else
153
65# define LOCK 0 154# define LOCK (void)0
66# define UNLOCK 0 155# define UNLOCK (void)0
67#endif
68 156
157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163
164/* helper storage struct for Coro::AIO */
165struct io_state
166{
167 AV *res;
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
71static HV *coro_state_stash; 181static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static __thread SV *coro_mortal; /* will be freed after next transfer */ 182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
75 184
76/* this is actually not only the c stack but also c registers etc... */ 185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
203
204static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
215
216/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx {
218 struct coro_cctx *next;
219
220 /* the stack */
221 void *sptr;
222 size_t ssize;
223
224 /* cpu state */
225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
227 JMPENV *top_env;
228 coro_context cctx;
229
230 U32 gen;
231#if CORO_USE_VALGRIND
232 int valgrind_id;
233#endif
234 unsigned char flags;
235} coro_cctx;
236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
77typedef struct { 245typedef struct {
78 int refcnt; /* pointer reference counter */ 246 SV *defsv;
79 int usecnt; /* shared by how many coroutines */ 247 AV *defav;
80 int gencnt; /* generation counter */ 248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
81 254
82 coro_context cctx; 255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83 256
84 void *sptr; 257/* this is a structure representing a perl-level coroutine */
85 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87
88struct coro { 258struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 259 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 260 coro_cctx *cctx;
91 261
92 /* the optional C context */ 262 /* 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; 263 AV *mainstack;
110 SV **stack_sp; 264 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;
134 265
135 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
136 AV *args; 267 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */
270
271 /* statistics */
272 int usecount; /* number of transfers to this coro */
273
274 /* coro process data */
275 int prio;
276 SV *throw; /* exception to be thrown */
277
278 /* async_pool */
279 SV *saved_deffh;
280
281 /* linked list */
282 struct coro *next, *prev;
137}; 283};
138 284
139typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
141 287
142/* mostly copied from op.c:cv_clone2 */ 288/** Coro ********************************************************************/
143STATIC AV * 289
144clone_padlist (pTHX_ AV *protopadlist) 290#define PRIO_MAX 3
291#define PRIO_HIGH 1
292#define PRIO_NORMAL 0
293#define PRIO_LOW -1
294#define PRIO_IDLE -3
295#define PRIO_MIN -4
296
297/* for Coro.pm */
298static SV *coro_current;
299static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301static int coro_nready;
302static struct coro *coro_first;
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
145{ 308{
146 AV *av; 309#if PERL_VERSION_ATLEAST (5,10,0)
147 I32 ix; 310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 311 get_sv (name, create);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 312#endif
150 SV **pname = AvARRAY (protopad_name); 313 return get_sv (name, create);
151 SV **ppad = AvARRAY (protopad); 314}
152 I32 fname = AvFILLp (protopad_name); 315
153 I32 fpad = AvFILLp (protopad); 316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336static AV *
337coro_clone_padlist (pTHX_ CV *cv)
338{
339 AV *padlist = CvPADLIST (cv);
154 AV *newpadlist, *newpad_name, *newpad; 340 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);
164 341
165 newpadlist = newAV (); 342 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
348#endif
349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
350 --AvFILLp (padlist);
351
352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
168 av_store (newpadlist, 1, (SV *) newpad); 353 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
238 354
239 return newpadlist; 355 return newpadlist;
240} 356}
241 357
242STATIC void 358static void
243free_padlist (pTHX_ AV *padlist) 359free_padlist (pTHX_ AV *padlist)
244{ 360{
245 /* may be during global destruction */ 361 /* may be during global destruction */
246 if (SvREFCNT (padlist)) 362 if (SvREFCNT (padlist))
247 { 363 {
… …
261 377
262 SvREFCNT_dec ((SV*)padlist); 378 SvREFCNT_dec ((SV*)padlist);
263 } 379 }
264} 380}
265 381
266STATIC int 382static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 383coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 384{
269 AV *padlist; 385 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 386 AV *av = (AV *)mg->mg_obj;
271 387
272 /* casting is fun. */ 388 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 390 free_padlist (aTHX_ padlist);
275}
276 391
392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393
394 return 0;
395}
396
277#define PERL_MAGIC_coro PERL_MAGIC_ext 397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
278 399
279static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
280 440
281/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
282STATIC void 442static void
283get_padlist (pTHX_ CV *cv) 443get_padlist (pTHX_ CV *cv)
284{ 444{
285 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
286 447
287 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
288 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289 else 450 else
451 {
452#if CORO_PREFER_PERL_FUNCTIONS
453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
455 CV *cp = Perl_cv_clone (cv);
456 CvPADLIST (cv) = CvPADLIST (cp);
457 CvPADLIST (cp) = 0;
458 SvREFCNT_dec (cp);
459#else
290 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
461#endif
462 }
291} 463}
292 464
293STATIC void 465static void
294put_padlist (pTHX_ CV *cv) 466put_padlist (pTHX_ CV *cv)
295{ 467{
296 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
297 470
298 if (!mg) 471 if (expect_false (!mg))
299 { 472 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 }
305 473
306 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 474 av = (AV *)mg->mg_obj;
307}
308 475
309#define SB do { 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
310#define SE } while (0) 477 av_extend (av, AvMAX (av) + 1);
311 478
312#define LOAD(state) load_state(aTHX_ (state)); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
313#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 480}
314 481
315#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 482/** load & save, init *******************************************************/
316 483
317static void 484static void
318load_state(pTHX_ Coro__State c) 485load_perl (pTHX_ Coro__State c)
319{ 486{
320 PL_dowarn = c->dowarn; 487 perl_slots *slot = c->slot;
321 PL_in_eval = c->in_eval; 488 c->slot = 0;
322 489
323 PL_curstackinfo = c->curstackinfo;
324 PL_curstack = c->curstack;
325 PL_mainstack = c->mainstack; 490 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;
350 491
351 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 492 GvSV (PL_defgv) = slot->defsv;
352 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 493 GvAV (PL_defgv) = slot->defav;
353 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
497 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h"
499 #undef VAR
354 500
355 { 501 {
356 dSP; 502 dSP;
503
357 CV *cv; 504 CV *cv;
358 505
359 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
360 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
361 { 508 {
362 AV *padlist = (AV *)POPs;
363
364 if (padlist)
365 {
366 put_padlist (aTHX_ cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
367 CvPADLIST(cv) = padlist; 510 CvDEPTH (cv) = PTR2IV (POPs);
368 } 511 CvPADLIST (cv) = (AV *)POPs;
369
370 ++CvDEPTH(cv);
371 } 512 }
372 513
373 PUTBACK; 514 PUTBACK;
374 } 515 }
375} 516}
376 517
377static void 518static void
378save_state(pTHX_ Coro__State c, int flags) 519save_perl (pTHX_ Coro__State c)
379{ 520{
380 { 521 {
381 dSP; 522 dSP;
382 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
383 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
386 /* 527 /*
387 * the worst thing you can imagine happens first - we have to save 528 * the worst thing you can imagine happens first - we have to save
388 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
389 */ 530 */
390 531
391 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
392 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
393 for (;;) 534 for (;;)
394 { 535 {
395 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
396 { 537 {
397 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
398 539
399 if (CxTYPE(cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400 { 541 {
401 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
543
402 if (CvDEPTH(cv)) 544 if (expect_true (CvDEPTH (cv)))
403 { 545 {
404 EXTEND (SP, CvDEPTH(cv)*2); 546 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)); 547 PUSHs ((SV *)CvPADLIST (cv));
548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
415 550
551 CvDEPTH (cv) = 0;
416 get_padlist (aTHX_ cv); /* this is a monster */ 552 get_padlist (aTHX_ cv);
417 } 553 }
418 } 554 }
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 } 555 }
428 556
429 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 558 break;
431 559
432 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
435 } 563 }
436 564
437 PUTBACK; 565 PUTBACK;
438 } 566 }
439 567
440 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
441 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
442 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
443 579
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; 580 c->mainstack = PL_mainstack;
450 c->stack_sp = PL_stack_sp; 581
451 c->op = PL_op; 582 {
452 c->curpad = PL_curpad; 583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
453 c->comppad = PL_comppad; 584
454 c->stack_base = PL_stack_base; 585 slot->defav = GvAV (PL_defgv);
455 c->stack_max = PL_stack_max; 586 slot->defsv = DEFSV;
456 c->tmps_stack = PL_tmps_stack; 587 slot->errsv = ERRSV;
457 c->tmps_floor = PL_tmps_floor; 588 slot->irsgv = GvSV (irsgv);
458 c->tmps_ix = PL_tmps_ix; 589
459 c->tmps_max = PL_tmps_max; 590 #define VAR(name,type) slot->name = PL_ ## name;
460 c->markstack = PL_markstack; 591 # include "state.h"
461 c->markstack_ptr = PL_markstack_ptr; 592 #undef VAR
462 c->markstack_max = PL_markstack_max; 593 }
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} 594}
475 595
476/* 596/*
477 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
478 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
479 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
480 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
481 */ 601 */
482STATIC void 602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
605static void
483coro_init_stacks (pTHX) 606coro_init_stacks (pTHX)
484{ 607{
485 LOCK; 608 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; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
489 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
490 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491 612
492 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
493 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
494 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495 616
496 New(50,PL_tmps_stack,96,SV*); 617 New(50,PL_tmps_stack,32,SV*);
497 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
498 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
499 PL_tmps_max = 96; 620 PL_tmps_max = 32;
500 621
501 New(54,PL_markstack,16,I32); 622 New(54,PL_markstack,16,I32);
502 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
503 PL_markstack_max = PL_markstack + 16; 624 PL_markstack_max = PL_markstack + 16;
504 625
505#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
506 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
507#endif 628#endif
508 629
509 New(54,PL_scopestack,16,I32); 630 New(54,PL_scopestack,8,I32);
510 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
511 PL_scopestack_max = 16; 632 PL_scopestack_max = 8;
512 633
513 New(54,PL_savestack,96,ANY); 634 New(54,PL_savestack,24,ANY);
514 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
515 PL_savestack_max = 96; 636 PL_savestack_max = 24;
516 637
638#if !PERL_VERSION_ATLEAST (5,10,0)
517 New(54,PL_retstack,8,OP*); 639 New(54,PL_retstack,4,OP*);
518 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
519 PL_retstack_max = 8; 641 PL_retstack_max = 4;
520 642#endif
521 UNLOCK;
522} 643}
644#endif
523 645
524/* 646/*
525 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
526 */ 648 */
527STATIC void 649static void
528destroy_stacks(pTHX) 650coro_destruct_stacks (pTHX)
529{ 651{
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) 652 while (PL_curstackinfo->si_next)
542 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
543 654
544 while (PL_curstackinfo) 655 while (PL_curstackinfo)
545 { 656 {
546 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
547 658
548 { /*D*//*remove*/
549 dSP;
550 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
551 PUTBACK; /* possibly superfluous */
552 }
553
554 if (!IN_DESTRUCT) 659 if (!IN_DESTRUCT)
555 {
556 dounwind (-1);/*D*//*remove*/
557 SvREFCNT_dec (PL_curstackinfo->si_stack); 660 SvREFCNT_dec (PL_curstackinfo->si_stack);
558 }
559 661
560 Safefree (PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
561 Safefree (PL_curstackinfo); 663 Safefree (PL_curstackinfo);
562 PL_curstackinfo = p; 664 PL_curstackinfo = p;
563 } 665 }
564 666
565 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
566 Safefree (PL_markstack); 668 Safefree (PL_markstack);
567 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
568 Safefree (PL_savestack); 670 Safefree (PL_savestack);
671#if !PERL_VERSION_ATLEAST (5,10,0)
569 Safefree (PL_retstack); 672 Safefree (PL_retstack);
673#endif
674}
675
676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 }
711 }
712
713 return rss;
714}
715
716/** coroutine stack handling ************************************************/
717
718static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
719static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
720static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
721
722/* apparently < 5.8.8 */
723#ifndef MgPV_nolen_const
724#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
725 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
726 (const char*)(mg)->mg_ptr)
727#endif
728
729/* we sometimes need to create the effect of entersub calling us */
730#define SSL_HEAD (void)0
731/* we somtimes need to create the effect of leaving via entersub */
732#define SSL_TAIL (void)0
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
570} 811}
571 812
572static void 813static void
573allocate_stack (Coro__State ctx, int alloc) 814coro_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{ 815{
630 /* 816 /*
631 * emulate part of the perl startup here. 817 * emulate part of the perl startup here.
632 */ 818 */
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); 819 coro_init_stacks (aTHX);
639 /*PL_curcop = 0;*/ 820
640 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 821 PL_runops = RUNOPS_DEFAULT;
822 PL_curcop = &PL_compiling;
823 PL_in_eval = EVAL_NULL;
824 PL_comppad = 0;
825 PL_curpm = 0;
826 PL_curpad = 0;
827 PL_localizing = 0;
828 PL_dirty = 0;
829 PL_restartop = 0;
830#if PERL_VERSION_ATLEAST (5,10,0)
831 PL_parser = 0;
832#endif
833
834 /* recreate the die/warn hooks */
835 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
836 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
837
838 GvSV (PL_defgv) = newSV (0);
839 GvAV (PL_defgv) = coro->args; coro->args = 0;
840 GvSV (PL_errgv) = newSV (0);
841 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
842 PL_rs = newSVsv (GvSV (irsgv));
843 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
844
845 {
846 dSP;
847 UNOP myop;
848
849 Zero (&myop, 1, UNOP);
850 myop.op_next = Nullop;
851 myop.op_flags = OPf_WANT_VOID;
852
853 PUSHMARK (SP);
854 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
855 PUTBACK;
856 PL_op = (OP *)&myop;
857 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
858 SPAGAIN;
859 }
860
861 /* this newly created coroutine might be run on an existing cctx which most
862 * likely was suspended in set_stacklevel, called from entersub.
863 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
864 * so we ENTER here for symmetry.
865 */
866 SSL_HEAD;
867}
868
869static void
870coro_destruct (pTHX_ struct coro *coro)
871{
872 if (!IN_DESTRUCT)
873 {
874 /* restore all saved variables and stuff */
875 LEAVE_SCOPE (0);
876 assert (PL_tmps_floor == -1);
877
878 /* free all temporaries */
879 FREETMPS;
880 assert (PL_tmps_ix == -1);
881
882 /* unwind all extra stacks */
883 POPSTACK_TO (PL_mainstack);
884
885 /* unwind main stack */
886 dounwind (-1);
887 }
888
889 SvREFCNT_dec (GvSV (PL_defgv));
641 SvREFCNT_dec (GvAV (PL_defgv)); 890 SvREFCNT_dec (GvAV (PL_defgv));
642 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 891 SvREFCNT_dec (GvSV (PL_errgv));
892 SvREFCNT_dec (PL_defoutgv);
893 SvREFCNT_dec (PL_rs);
894 SvREFCNT_dec (GvSV (irsgv));
643 895
644 SPAGAIN; 896 SvREFCNT_dec (PL_diehook);
897 SvREFCNT_dec (PL_warnhook);
898
899 SvREFCNT_dec (coro->saved_deffh);
900 SvREFCNT_dec (coro->throw);
645 901
646 if (ctx->stack) 902 coro_destruct_stacks (aTHX);
647 { 903}
648 ctx->cursp = 0;
649 904
650 PUSHMARK(SP); 905INLINE void
651 PUTBACK; 906free_coro_mortal (pTHX)
652 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 907{
653 908 if (expect_true (coro_mortal))
654 if (SvTRUE (ERRSV))
655 croak (NULL);
656 else
657 croak ("FATAL: CCTXT coroutine returned!");
658 } 909 {
659 else 910 SvREFCNT_dec (coro_mortal);
911 coro_mortal = 0;
660 { 912 }
661 UNOP myop; 913}
662 914
663 PL_op = (OP *)&myop; 915static int
916runops_trace (pTHX)
917{
918 COP *oldcop = 0;
919 int oldcxix = -2;
920 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
921 coro_cctx *cctx = coro->cctx;
664 922
665 Zero(&myop, 1, UNOP); 923 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
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 } 924 {
684} 925 PERL_ASYNC_CHECK ();
685 926
686static void 927 if (cctx->flags & CC_TRACE_ALL)
687continue_coro (void *arg)
688{
689 /*
690 * this is a _very_ stripped down perl interpreter ;)
691 */
692 dTHX;
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 {
712 if (next->mainstack)
713 { 928 {
714 LOCK; 929 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 { 930 {
726 if (!prev->stack) 931 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
727 allocate_stack (prev, 0); 932 SV **bot, **top;
728 else if (prev->cursp != stacklevel 933 AV *av = newAV (); /* return values */
729 && prev->stack->usecnt > 1) 934 SV **cb;
935 dSP;
936
937 GV *gv = CvGV (cx->blk_sub.cv);
938 SV *fullname = sv_2mortal (newSV (0));
939 if (isGV (gv))
940 gv_efullname3 (fullname, gv, 0);
941
942 bot = PL_stack_base + cx->blk_oldsp + 1;
943 top = cx->blk_gimme == G_ARRAY ? SP + 1
944 : cx->blk_gimme == G_SCALAR ? bot + 1
945 : bot;
946
947 av_extend (av, top - bot);
948 while (bot < top)
949 av_push (av, SvREFCNT_inc_NN (*bot++));
950
951 PL_runops = RUNOPS_DEFAULT;
952 ENTER;
953 SAVETMPS;
954 EXTEND (SP, 3);
955 PUSHMARK (SP);
956 PUSHs (&PL_sv_no);
957 PUSHs (fullname);
958 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
959 PUTBACK;
960 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
961 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
962 SPAGAIN;
963 FREETMPS;
964 LEAVE;
965 PL_runops = runops_trace;
966 }
967
968 if (oldcop != PL_curcop)
969 {
970 oldcop = PL_curcop;
971
972 if (PL_curcop != &PL_compiling)
730 { 973 {
731 prev->gencnt = ++prev->stack->gencnt; 974 SV **cb;
732 prev->stack->usecnt = 1;
733 }
734 975
735 /* has our stack been invalidated? */ 976 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
736 if (next->stack && next->stack->gencnt != next->gencnt)
737 { 977 {
738 deallocate_stack (next); 978 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739 allocate_stack (next, 1); 979
740 coro_create (&(next->stack->cctx), 980 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
741 continue_coro, (void *)next, 981 {
742 next->stack->sptr, labs (next->stack->ssize)); 982 runops_proc_t old_runops = PL_runops;
983 dSP;
984 GV *gv = CvGV (cx->blk_sub.cv);
985 SV *fullname = sv_2mortal (newSV (0));
986
987 if (isGV (gv))
988 gv_efullname3 (fullname, gv, 0);
989
990 PL_runops = RUNOPS_DEFAULT;
991 ENTER;
992 SAVETMPS;
993 EXTEND (SP, 3);
994 PUSHMARK (SP);
995 PUSHs (&PL_sv_yes);
996 PUSHs (fullname);
997 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
998 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN;
1002 FREETMPS;
1003 LEAVE;
1004 PL_runops = runops_trace;
1005 }
1006
1007 oldcxix = cxstack_ix;
743 } 1008 }
744 1009
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1010 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 { 1011 {
767 PL_top_env = &next->start_env; 1012 dSP;
768 1013
769 setup_coro (next); 1014 PL_runops = RUNOPS_DEFAULT;
770 next->cursp = stacklevel; 1015 ENTER;
771 1016 SAVETMPS;
772 prev->stack->refcnt++; 1017 EXTEND (SP, 3);
773 prev->stack->usecnt++; 1018 PL_runops = RUNOPS_DEFAULT;
774 next->stack = prev->stack; 1019 PUSHMARK (SP);
775 next->gencnt = prev->gencnt; 1020 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1021 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
776 } 1029 }
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 } 1030 }
788 } 1031 }
789 else
790 {
791 setup_coro (next);
792 next->cursp = stacklevel;
793 }
794 } 1032 }
795 } 1033 }
796 1034
1035 TAINT_NOT;
1036 return 0;
1037}
1038
1039static void
1040prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1041{
1042 ta->prev = (struct coro *)cctx;
1043 ta->next = 0;
1044}
1045
1046/* inject a fake call to Coro::State::_cctx_init into the execution */
1047/* _cctx_init should be careful, as it could be called at almost any time */
1048/* during execution of a perl program */
1049/* also initialises PL_top_env */
1050static void NOINLINE
1051cctx_prepare (pTHX_ coro_cctx *cctx)
1052{
1053 dSP;
1054 UNOP myop;
1055
1056 PL_top_env = &PL_start_env;
1057
1058 if (cctx->flags & CC_TRACE)
1059 PL_runops = runops_trace;
1060
1061 Zero (&myop, 1, UNOP);
1062 myop.op_next = PL_op;
1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1064
1065 PUSHMARK (SP);
1066 EXTEND (SP, 2);
1067 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1068 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1069 PUTBACK;
1070 PL_op = (OP *)&myop;
1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1072 SPAGAIN;
1073}
1074
1075/* the tail of transfer: execute stuff we can only do after a transfer */
1076INLINE void
1077transfer_tail (pTHX)
1078{
1079 struct coro *next = (struct coro *)transfer_next;
1080 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1082
1083 free_coro_mortal (aTHX);
1084 UNLOCK;
1085
1086 if (expect_false (next->throw))
1087 {
1088 SV *exception = sv_2mortal (next->throw);
1089
1090 next->throw = 0;
1091 sv_setsv (ERRSV, exception);
1092 croak (0);
1093 }
1094}
1095
1096/*
1097 * this is a _very_ stripped down perl interpreter ;)
1098 */
1099static void
1100cctx_run (void *arg)
1101{
1102#ifdef USE_ITHREADS
1103# if CORO_PTHREAD
1104 PERL_SET_CONTEXT (coro_thx);
1105# endif
1106#endif
1107 {
1108 dTHX;
1109
1110 /* entersub called ENTER, but we never 'returned', undo that here */
1111 SSL_TAIL;
1112
1113 /* we now skip the op that did lead to transfer() */
1114 PL_op = PL_op->op_next;
1115
1116 /* inject a fake subroutine call to cctx_init */
1117 cctx_prepare (aTHX_ (coro_cctx *)arg);
1118
1119 /* cctx_run is the alternative tail of transfer() */
1120 transfer_tail (aTHX);
1121
1122 /* somebody or something will hit me for both perl_run and PL_restartop */
1123 PL_restartop = PL_op;
1124 perl_run (PL_curinterp);
1125
1126 /*
1127 * If perl-run returns we assume exit() was being called or the coro
1128 * fell off the end, which seems to be the only valid (non-bug)
1129 * reason for perl_run to return. We try to exit by jumping to the
1130 * bootstrap-time "top" top_env, as we cannot restore the "main"
1131 * coroutine as Coro has no such concept
1132 */
1133 PL_top_env = main_top_env;
1134 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1135 }
1136}
1137
1138static coro_cctx *
1139cctx_new ()
1140{
1141 coro_cctx *cctx;
1142
1143 ++cctx_count;
1144 New (0, cctx, 1, coro_cctx);
1145
1146 cctx->gen = cctx_gen;
1147 cctx->flags = 0;
1148 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1149
1150 return cctx;
1151}
1152
1153/* create a new cctx only suitable as source */
1154static coro_cctx *
1155cctx_new_empty ()
1156{
1157 coro_cctx *cctx = cctx_new ();
1158
1159 cctx->sptr = 0;
1160 coro_create (&cctx->cctx, 0, 0, 0, 0);
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx suitable as destination/running a perl interpreter */
1166static coro_cctx *
1167cctx_new_run ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170 void *stack_start;
1171 size_t stack_size;
1172
1173#if HAVE_MMAP
1174 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1175 /* mmap supposedly does allocate-on-write for us */
1176 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1177
1178 if (cctx->sptr != (void *)-1)
1179 {
1180 #if CORO_STACKGUARD
1181 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1182 #endif
1183 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1184 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1185 cctx->flags |= CC_MAPPED;
1186 }
1187 else
1188#endif
1189 {
1190 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1191 New (0, cctx->sptr, cctx_stacksize, long);
1192
1193 if (!cctx->sptr)
1194 {
1195 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1196 _exit (EXIT_FAILURE);
1197 }
1198
1199 stack_start = cctx->sptr;
1200 stack_size = cctx->ssize;
1201 }
1202
1203 #if CORO_USE_VALGRIND
1204 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1205 #endif
1206
1207 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1208
1209 return cctx;
1210}
1211
1212static void
1213cctx_destroy (coro_cctx *cctx)
1214{
1215 if (!cctx)
1216 return;
1217
1218 --cctx_count;
1219 coro_destroy (&cctx->cctx);
1220
1221 /* coro_transfer creates new, empty cctx's */
1222 if (cctx->sptr)
1223 {
1224 #if CORO_USE_VALGRIND
1225 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1226 #endif
1227
1228#if HAVE_MMAP
1229 if (cctx->flags & CC_MAPPED)
1230 munmap (cctx->sptr, cctx->ssize);
1231 else
1232#endif
1233 Safefree (cctx->sptr);
1234 }
1235
1236 Safefree (cctx);
1237}
1238
1239/* wether this cctx should be destructed */
1240#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1241
1242static coro_cctx *
1243cctx_get (pTHX)
1244{
1245 while (expect_true (cctx_first))
1246 {
1247 coro_cctx *cctx = cctx_first;
1248 cctx_first = cctx->next;
1249 --cctx_idle;
1250
1251 if (expect_true (!CCTX_EXPIRED (cctx)))
1252 return cctx;
1253
1254 cctx_destroy (cctx);
1255 }
1256
1257 return cctx_new_run ();
1258}
1259
1260static void
1261cctx_put (coro_cctx *cctx)
1262{
1263 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1264
1265 /* free another cctx if overlimit */
1266 if (expect_false (cctx_idle >= cctx_max_idle))
1267 {
1268 coro_cctx *first = cctx_first;
1269 cctx_first = first->next;
1270 --cctx_idle;
1271
1272 cctx_destroy (first);
1273 }
1274
1275 ++cctx_idle;
1276 cctx->next = cctx_first;
1277 cctx_first = cctx;
1278}
1279
1280/** coroutine switching *****************************************************/
1281
1282static void
1283transfer_check (pTHX_ struct coro *prev, struct coro *next)
1284{
1285 if (expect_true (prev != next))
1286 {
1287 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1288 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1289
1290 if (expect_false (next->flags & CF_RUNNING))
1291 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1292
1293 if (expect_false (next->flags & CF_DESTROYED))
1294 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1295
1296#if !PERL_VERSION_ATLEAST (5,10,0)
1297 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1298 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1299#endif
1300 }
1301}
1302
1303/* always use the TRANSFER macro */
1304static void NOINLINE
1305transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1306{
1307 dSTACKLEVEL;
1308
1309 /* sometimes transfer is only called to set idle_sp */
1310 if (expect_false (!next))
1311 {
1312 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1313 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1314 }
1315 else if (expect_true (prev != next))
1316 {
1317 coro_cctx *prev__cctx;
1318
1319 if (expect_false (prev->flags & CF_NEW))
1320 {
1321 /* create a new empty/source context */
1322 prev->cctx = cctx_new_empty ();
1323 prev->flags &= ~CF_NEW;
1324 prev->flags |= CF_RUNNING;
1325 }
1326
1327 prev->flags &= ~CF_RUNNING;
1328 next->flags |= CF_RUNNING;
1329
1330 LOCK;
1331
1332 /* first get rid of the old state */
1333 save_perl (aTHX_ prev);
1334
1335 if (expect_false (next->flags & CF_NEW))
1336 {
1337 /* need to start coroutine */
1338 next->flags &= ~CF_NEW;
1339 /* setup coroutine call */
1340 coro_setup (aTHX_ next);
1341 }
1342 else
1343 load_perl (aTHX_ next);
1344
1345 prev__cctx = prev->cctx;
1346
1347 /* possibly untie and reuse the cctx */
1348 if (expect_true (
1349 prev__cctx->idle_sp == STACKLEVEL
1350 && !(prev__cctx->flags & CC_TRACE)
1351 && !force_cctx
1352 ))
1353 {
1354 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1355 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1356
1357 prev->cctx = 0;
1358
1359 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1360 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1361 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1362 if (!next->cctx)
1363 next->cctx = cctx_get (aTHX);
1364
1365 cctx_put (prev__cctx);
1366 }
1367
1368 ++next->usecount;
1369
1370 if (expect_true (!next->cctx))
1371 next->cctx = cctx_get (aTHX);
1372
1373 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1374 transfer_next = next;
1375
1376 if (expect_false (prev__cctx != next->cctx))
1377 {
1378 prev__cctx->top_env = PL_top_env;
1379 PL_top_env = next->cctx->top_env;
1380 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1381 }
1382
1383 transfer_tail (aTHX);
1384 }
1385}
1386
1387#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1388#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1389
1390/** high level stuff ********************************************************/
1391
1392static int
1393coro_state_destroy (pTHX_ struct coro *coro)
1394{
1395 if (coro->flags & CF_DESTROYED)
1396 return 0;
1397
1398 coro->flags |= CF_DESTROYED;
1399
1400 if (coro->flags & CF_READY)
1401 {
1402 /* reduce nready, as destroying a ready coro effectively unreadies it */
1403 /* alternative: look through all ready queues and remove the coro */
1404 LOCK;
1405 --coro_nready;
1406 UNLOCK;
1407 }
1408 else
1409 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1410
1411 if (coro->mainstack && coro->mainstack != main_mainstack)
1412 {
1413 struct coro temp;
1414
1415 if (coro->flags & CF_RUNNING)
1416 croak ("FATAL: tried to destroy currently running coroutine");
1417
1418 save_perl (aTHX_ &temp);
1419 load_perl (aTHX_ coro);
1420
1421 coro_destruct (aTHX_ coro);
1422
1423 load_perl (aTHX_ &temp);
1424
1425 coro->slot = 0;
1426 }
1427
1428 cctx_destroy (coro->cctx);
1429 SvREFCNT_dec (coro->args);
1430
1431 if (coro->next) coro->next->prev = coro->prev;
1432 if (coro->prev) coro->prev->next = coro->next;
1433 if (coro == coro_first) coro_first = coro->next;
1434
1435 return 1;
1436}
1437
1438static int
1439coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1440{
1441 struct coro *coro = (struct coro *)mg->mg_ptr;
1442 mg->mg_ptr = 0;
1443
1444 coro->hv = 0;
1445
1446 if (--coro->refcnt < 0)
1447 {
1448 coro_state_destroy (aTHX_ coro);
1449 Safefree (coro);
1450 }
1451
1452 return 0;
1453}
1454
1455static int
1456coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1457{
1458 struct coro *coro = (struct coro *)mg->mg_ptr;
1459
1460 ++coro->refcnt;
1461
1462 return 0;
1463}
1464
1465static MGVTBL coro_state_vtbl = {
1466 0, 0, 0, 0,
1467 coro_state_free,
1468 0,
1469#ifdef MGf_DUP
1470 coro_state_dup,
1471#else
1472# define MGf_DUP 0
1473#endif
1474};
1475
1476static void
1477prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1478{
1479 ta->prev = SvSTATE (prev_sv);
1480 ta->next = SvSTATE (next_sv);
1481 TRANSFER_CHECK (*ta);
1482}
1483
1484static void
1485api_transfer (SV *prev_sv, SV *next_sv)
1486{
1487 dTHX;
1488 struct transfer_args ta;
1489
1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491 TRANSFER (ta, 1);
1492}
1493
1494/** Coro ********************************************************************/
1495
1496static void
1497coro_enq (pTHX_ SV *coro_sv)
1498{
1499 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1500}
1501
1502static SV *
1503coro_deq (pTHX)
1504{
1505 int prio;
1506
1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1508 if (AvFILLp (coro_ready [prio]) >= 0)
1509 return av_shift (coro_ready [prio]);
1510
1511 return 0;
1512}
1513
1514static int
1515api_ready (SV *coro_sv)
1516{
1517 dTHX;
1518 struct coro *coro;
1519 SV *sv_hook;
1520 void (*xs_hook)(void);
1521
1522 if (SvROK (coro_sv))
1523 coro_sv = SvRV (coro_sv);
1524
1525 coro = SvSTATE (coro_sv);
1526
1527 if (coro->flags & CF_READY)
1528 return 0;
1529
1530 coro->flags |= CF_READY;
1531
797 LOCK; 1532 LOCK;
798 if (coro_mortal) 1533
799 { 1534 sv_hook = coro_nready ? 0 : coro_readyhook;
800 SvREFCNT_dec (coro_mortal); 1535 xs_hook = coro_nready ? 0 : coroapi.readyhook;
801 coro_mortal = 0; 1536
802 } 1537 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1538 ++coro_nready;
1539
803 UNLOCK; 1540 UNLOCK;
804} 1541
805 1542 if (sv_hook)
806#define SV_CORO(sv,func) \
807 do { \
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
827#define SvSTATE(sv) (struct coro *)SvIV (sv)
828
829static void
830api_transfer(pTHX_ SV *prev, SV *next, int flags)
831{
832 SV_CORO (prev, "Coro::transfer");
833 SV_CORO (next, "Coro::transfer");
834
835 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
836}
837
838/** Coro ********************************************************************/
839
840#define PRIO_MAX 3
841#define PRIO_HIGH 1
842#define PRIO_NORMAL 0
843#define PRIO_LOW -1
844#define PRIO_IDLE -3
845#define PRIO_MIN -4
846
847/* for Coro.pm */
848static GV *coro_current, *coro_idle;
849static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
850static int coro_nready;
851
852static void
853coro_enq (pTHX_ SV *sv)
854{
855 if (SvTYPE (sv) == SVt_PVHV)
856 {
857 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
858 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860 prio = prio > PRIO_MAX ? PRIO_MAX
861 : prio < PRIO_MIN ? PRIO_MIN
862 : prio;
863
864 av_push (coro_ready [prio - PRIO_MIN], sv);
865 coro_nready++;
866
867 return;
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 { 1543 {
885 coro_nready--; 1544 dSP;
886 return av_shift (coro_ready[prio]); 1545
1546 ENTER;
1547 SAVETMPS;
1548
1549 PUSHMARK (SP);
1550 PUTBACK;
1551 call_sv (sv_hook, G_DISCARD);
1552 SPAGAIN;
1553
1554 FREETMPS;
1555 LEAVE;
887 } 1556 }
888 1557
1558 if (xs_hook)
1559 xs_hook ();
1560
889 return 0; 1561 return 1;
890} 1562}
891 1563
892static void 1564static int
893api_ready (SV *coro) 1565api_is_ready (SV *coro_sv)
894{ 1566{
895 dTHX; 1567 dTHX;
896 1568
897 if (SvROK (coro)) 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
898 coro = SvRV (coro); 1570}
1571
1572INLINE void
1573prepare_schedule (pTHX_ struct transfer_args *ta)
1574{
1575 SV *prev_sv, *next_sv;
1576
1577 for (;;)
1578 {
1579 LOCK;
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586 UNLOCK;
1587
1588 ENTER;
1589 SAVETMPS;
1590
1591 PUSHMARK (SP);
1592 PUTBACK;
1593 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1594 SPAGAIN;
1595
1596 FREETMPS;
1597 LEAVE;
1598 continue;
1599 }
1600
1601 ta->next = SvSTATE (next_sv);
1602
1603 /* cannot transfer to destroyed coros, skip and look for next */
1604 if (expect_false (ta->next->flags & CF_DESTROYED))
1605 {
1606 UNLOCK;
1607 SvREFCNT_dec (next_sv);
1608 /* coro_nready has already been taken care of by destroy */
1609 continue;
1610 }
1611
1612 --coro_nready;
1613 UNLOCK;
1614 break;
1615 }
1616
1617 /* free this only after the transfer */
1618 prev_sv = SvRV (coro_current);
1619 ta->prev = SvSTATE (prev_sv);
1620 TRANSFER_CHECK (*ta);
1621 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1622 ta->next->flags &= ~CF_READY;
1623 SvRV_set (coro_current, next_sv);
899 1624
900 LOCK; 1625 LOCK;
901 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1626 free_coro_mortal (aTHX);
1627 coro_mortal = prev_sv;
902 UNLOCK; 1628 UNLOCK;
1629}
1630
1631INLINE void
1632prepare_cede (pTHX_ struct transfer_args *ta)
1633{
1634 api_ready (coro_current);
1635 prepare_schedule (aTHX_ ta);
1636}
1637
1638static int
1639prepare_cede_notself (pTHX_ struct transfer_args *ta)
1640{
1641 if (coro_nready)
1642 {
1643 SV *prev = SvRV (coro_current);
1644 prepare_schedule (aTHX_ ta);
1645 api_ready (prev);
1646 return 1;
1647 }
1648 else
1649 return 0;
903} 1650}
904 1651
905static void 1652static void
906api_schedule (void) 1653api_schedule (void)
907{ 1654{
908 dTHX; 1655 dTHX;
1656 struct transfer_args ta;
909 1657
910 SV *prev, *next; 1658 prepare_schedule (aTHX_ &ta);
1659 TRANSFER (ta, 1);
1660}
911 1661
912 LOCK; 1662static int
1663api_cede (void)
1664{
1665 dTHX;
1666 struct transfer_args ta;
913 1667
914 prev = SvRV (GvSV (coro_current)); 1668 prepare_cede (aTHX_ &ta);
915 next = coro_deq (aTHX_ PRIO_MIN);
916 1669
917 if (!next) 1670 if (expect_true (ta.prev != ta.next))
918 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1671 {
1672 TRANSFER (ta, 1);
1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
919 1678
920 /* free this only after the transfer */ 1679static int
921 coro_mortal = prev; 1680api_cede_notself (void)
922 SV_CORO (prev, "Coro::schedule"); 1681{
1682 dTHX;
1683 struct transfer_args ta;
923 1684
924 SvRV (GvSV (coro_current)) = next; 1685 if (prepare_cede_notself (aTHX_ &ta))
925 1686 {
926 SV_CORO (next, "Coro::schedule"); 1687 TRANSFER (ta, 1);
927 1688 return 1;
928 UNLOCK; 1689 }
929 1690 else
930 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1691 return 0;
931 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932} 1692}
933 1693
934static void 1694static void
935api_cede (void) 1695api_trace (SV *coro_sv, int flags)
936{ 1696{
937 dTHX; 1697 dTHX;
1698 struct coro *coro = SvSTATE (coro_sv);
938 1699
939 LOCK; 1700 if (flags & CC_TRACE)
940 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1701 {
941 UNLOCK; 1702 if (!coro->cctx)
1703 coro->cctx = cctx_new_run ();
1704 else if (!(coro->cctx->flags & CC_TRACE))
1705 croak ("cannot enable tracing on coroutine with custom stack");
942 1706
1707 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1708 }
1709 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1710 {
1711 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1712
1713 if (coro->flags & CF_RUNNING)
1714 PL_runops = RUNOPS_DEFAULT;
1715 else
1716 coro->slot->runops = RUNOPS_DEFAULT;
1717 }
1718}
1719
1720#if 0
1721static int
1722coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1723{
1724 AV *padlist;
1725 AV *av = (AV *)mg->mg_obj;
1726
1727 abort ();
1728
1729 return 0;
1730}
1731
1732static MGVTBL coro_gensub_vtbl = {
1733 0, 0, 0, 0,
1734 coro_gensub_free
1735};
1736#endif
1737
1738/*****************************************************************************/
1739/* PerlIO::cede */
1740
1741typedef struct
1742{
1743 PerlIOBuf base;
1744 NV next, every;
1745} PerlIOCede;
1746
1747static IV
1748PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1749{
1750 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1751
1752 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1753 self->next = nvtime () + self->every;
1754
1755 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1756}
1757
1758static SV *
1759PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1760{
1761 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1762
1763 return newSVnv (self->every);
1764}
1765
1766static IV
1767PerlIOCede_flush (pTHX_ PerlIO *f)
1768{
1769 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1770 double now = nvtime ();
1771
1772 if (now >= self->next)
1773 {
943 api_schedule (); 1774 api_cede ();
944} 1775 self->next = now + self->every;
1776 }
945 1777
1778 return PerlIOBuf_flush (aTHX_ f);
1779}
1780
1781static PerlIO_funcs PerlIO_cede =
1782{
1783 sizeof(PerlIO_funcs),
1784 "cede",
1785 sizeof(PerlIOCede),
1786 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1787 PerlIOCede_pushed,
1788 PerlIOBuf_popped,
1789 PerlIOBuf_open,
1790 PerlIOBase_binmode,
1791 PerlIOCede_getarg,
1792 PerlIOBase_fileno,
1793 PerlIOBuf_dup,
1794 PerlIOBuf_read,
1795 PerlIOBuf_unread,
1796 PerlIOBuf_write,
1797 PerlIOBuf_seek,
1798 PerlIOBuf_tell,
1799 PerlIOBuf_close,
1800 PerlIOCede_flush,
1801 PerlIOBuf_fill,
1802 PerlIOBase_eof,
1803 PerlIOBase_error,
1804 PerlIOBase_clearerr,
1805 PerlIOBase_setlinebuf,
1806 PerlIOBuf_get_base,
1807 PerlIOBuf_bufsiz,
1808 PerlIOBuf_get_ptr,
1809 PerlIOBuf_get_cnt,
1810 PerlIOBuf_set_ptrcnt,
1811};
1812
1813/*****************************************************************************/
1814
1815static const CV *ssl_cv; /* for quick consistency check */
1816
1817static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1818static SV *ssl_arg0;
1819static SV *ssl_arg1;
1820
1821/* this restores the stack in the case we patched the entersub, to */
1822/* recreate the stack frame as perl will on following calls */
1823/* since entersub cleared the stack */
1824static OP *
1825pp_restore (pTHX)
1826{
1827 dSP;
1828
1829 PUSHMARK (SP);
1830
1831 EXTEND (SP, 3);
1832 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1833 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1834 PUSHs ((SV *)CvGV (ssl_cv));
1835
1836 RETURNOP (ssl_restore.op_first);
1837}
1838
1839/* declare prototype */
1840XS(XS_Coro__State__set_stacklevel);
1841
1842static OP *
1843pp_set_stacklevel (pTHX)
1844{
1845 dSP;
1846 struct transfer_args ta;
1847 SV **arg = PL_stack_base + TOPMARK + 1;
1848 int items = SP - arg; /* args without function object */
1849
1850 /* do a quick consistency check on the "function" object, and if it isn't */
1851 /* for us, divert to the real entersub */
1852 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1853 return PL_ppaddr[OP_ENTERSUB](aTHX);
1854
1855 /* pop args */
1856 SP = PL_stack_base + POPMARK;
1857
1858 if (!(PL_op->op_flags & OPf_STACKED))
1859 {
1860 /* ampersand-form of call, use @_ instead of stack */
1861 AV *av = GvAV (PL_defgv);
1862 arg = AvARRAY (av);
1863 items = AvFILLp (av) + 1;
1864 }
1865
1866 PUTBACK;
1867 switch (PL_op->op_private & 7)
1868 {
1869 case 0:
1870 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1871 break;
1872
1873 case 1:
1874 if (items != 2)
1875 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1876
1877 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1878 break;
1879
1880 case 2:
1881 prepare_schedule (aTHX_ &ta);
1882 break;
1883
1884 case 3:
1885 prepare_cede (aTHX_ &ta);
1886 break;
1887
1888 case 4:
1889 if (!prepare_cede_notself (aTHX_ &ta))
1890 RETURN;
1891
1892 break;
1893 }
1894
1895 TRANSFER (ta, 0);
1896 SPAGAIN;
1897
1898skip:
1899
1900 RETURN;
1901}
1902
946MODULE = Coro::State PACKAGE = Coro::State 1903MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
947 1904
948PROTOTYPES: ENABLE 1905PROTOTYPES: DISABLE
1906
1907# these not obviously related functions are all rolled into the same xs
1908# function to increase chances that they all will call transfer with the same
1909# stack offset
1910void
1911_set_stacklevel (...)
1912 ALIAS:
1913 Coro::State::transfer = 1
1914 Coro::schedule = 2
1915 Coro::cede = 3
1916 Coro::cede_notself = 4
1917 CODE:
1918{
1919 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1920
1921 /* we patch the op, and then re-run the whole call */
1922 /* we have to put some dummy argument on the stack for this to work */
1923 /* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1924 ssl_restore.op_next = (OP *)&ssl_restore;
1925 ssl_restore.op_type = OP_NULL;
1926 ssl_restore.op_ppaddr = pp_restore;
1927 ssl_restore.op_first = PL_op;
1928
1929 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1930 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1931
1932 PL_op->op_ppaddr = pp_set_stacklevel;
1933 PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1934
1935 PL_op = (OP *)&ssl_restore;
1936}
949 1937
950BOOT: 1938BOOT:
951{ /* {} necessary for stoopid perl-5.6.x */ 1939{
952#ifdef USE_ITHREADS 1940#ifdef USE_ITHREADS
953 MUTEX_INIT (&coro_mutex); 1941 MUTEX_INIT (&coro_lock);
1942# if CORO_PTHREAD
1943 coro_thx = PERL_GET_CONTEXT;
954#endif 1944# endif
1945#endif
1946 BOOT_PAGESIZE;
955 1947
956 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1948 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
957 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1949
1950 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1951 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1952
1953 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1954 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1955 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1956
1957 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1958 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1959 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1960
958 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1961 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959 1962
960 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1963 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
961 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1964 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
962 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1965 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
963 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1966 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
964 1967
965 main_mainstack = PL_mainstack; 1968 main_mainstack = PL_mainstack;
1969 main_top_env = PL_top_env;
966 1970
1971 while (main_top_env->je_prev)
1972 main_top_env = main_top_env->je_prev;
1973
967 coroapi.ver = CORO_API_VERSION; 1974 coroapi.ver = CORO_API_VERSION;
1975 coroapi.rev = CORO_API_REVISION;
968 coroapi.transfer = api_transfer; 1976 coroapi.transfer = api_transfer;
969}
970 1977
971Coro::State 1978 {
972_newprocess(args) 1979 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
973 SV * args 1980
974 PROTOTYPE: $ 1981 if (!svp) croak ("Time::HiRes is required");
1982 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1983
1984 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1985 }
1986
1987 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1988}
1989
1990SV *
1991new (char *klass, ...)
975 CODE: 1992 CODE:
976 Coro__State coro; 1993{
1994 struct coro *coro;
1995 MAGIC *mg;
1996 HV *hv;
1997 int i;
977 1998
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); 1999 Newz (0, coro, 1, struct coro);
2000 coro->args = newAV ();
2001 coro->flags = CF_NEW;
982 2002
983 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2003 if (coro_first) coro_first->prev = coro;
984 coro->mainstack = 0; /* actual work is done inside transfer */ 2004 coro->next = coro_first;
985 coro->stack = 0; 2005 coro_first = coro;
986 2006
987 /* same as JMPENV_BOOTSTRAP */ 2007 coro->hv = hv = newHV ();
988 /* we might be able to recycle start_env, but safe is safe */ 2008 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
989 //Zero(&coro->start_env, 1, JMPENV); 2009 mg->mg_flags |= MGf_DUP;
990 coro->start_env.je_ret = -1; 2010 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991 coro->start_env.je_mustcatch = TRUE;
992 2011
993 RETVAL = coro; 2012 av_extend (coro->args, items - 1);
2013 for (i = 1; i < items; i++)
2014 av_push (coro->args, newSVsv (ST (i)));
2015}
994 OUTPUT: 2016 OUTPUT:
995 RETVAL 2017 RETVAL
996 2018
2019bool
2020_destroy (SV *coro_sv)
2021 CODE:
2022 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2023 OUTPUT:
2024 RETVAL
2025
997void 2026void
998transfer(prev, next, flags)
999 SV *prev
1000 SV *next
1001 int flags
1002 PROTOTYPE: @
1003 CODE:
1004 PUTBACK;
1005 SV_CORO (next, "Coro::transfer");
1006 SV_CORO (prev, "Coro::transfer");
1007 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1008 SPAGAIN;
1009
1010void
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) 2027_exit (int code)
1038 int code
1039 PROTOTYPE: $ 2028 PROTOTYPE: $
1040 CODE: 2029 CODE:
1041 _exit (code); 2030 _exit (code);
1042 2031
1043MODULE = Coro::State PACKAGE = Coro::Cont 2032int
2033cctx_stacksize (int new_stacksize = 0)
2034 CODE:
2035 RETVAL = cctx_stacksize;
2036 if (new_stacksize)
2037 {
2038 cctx_stacksize = new_stacksize;
2039 ++cctx_gen;
2040 }
2041 OUTPUT:
2042 RETVAL
1044 2043
1045# this is slightly dirty (should expose a c-level api) 2044int
2045cctx_max_idle (int max_idle = 0)
2046 CODE:
2047 RETVAL = cctx_max_idle;
2048 if (max_idle > 1)
2049 cctx_max_idle = max_idle;
2050 OUTPUT:
2051 RETVAL
2052
2053int
2054cctx_count ()
2055 CODE:
2056 RETVAL = cctx_count;
2057 OUTPUT:
2058 RETVAL
2059
2060int
2061cctx_idle ()
2062 CODE:
2063 RETVAL = cctx_idle;
2064 OUTPUT:
2065 RETVAL
1046 2066
1047void 2067void
1048yield(...) 2068list ()
2069 PPCODE:
2070{
2071 struct coro *coro;
2072 for (coro = coro_first; coro; coro = coro->next)
2073 if (coro->hv)
2074 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2075}
2076
2077void
2078call (Coro::State coro, SV *coderef)
2079 ALIAS:
2080 eval = 1
2081 CODE:
2082{
2083 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2084 {
2085 struct coro temp;
2086
2087 if (!(coro->flags & CF_RUNNING))
2088 {
2089 PUTBACK;
2090 save_perl (aTHX_ &temp);
2091 load_perl (aTHX_ coro);
2092 }
2093
2094 {
2095 dSP;
2096 ENTER;
2097 SAVETMPS;
2098 PUTBACK;
2099 PUSHSTACK;
2100 PUSHMARK (SP);
2101
2102 if (ix)
2103 eval_sv (coderef, 0);
2104 else
2105 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2106
2107 POPSTACK;
2108 SPAGAIN;
2109 FREETMPS;
2110 LEAVE;
2111 PUTBACK;
2112 }
2113
2114 if (!(coro->flags & CF_RUNNING))
2115 {
2116 save_perl (aTHX_ coro);
2117 load_perl (aTHX_ &temp);
2118 SPAGAIN;
2119 }
2120 }
2121}
2122
2123SV *
2124is_ready (Coro::State coro)
2125 PROTOTYPE: $
2126 ALIAS:
2127 is_ready = CF_READY
2128 is_running = CF_RUNNING
2129 is_new = CF_NEW
2130 is_destroyed = CF_DESTROYED
2131 CODE:
2132 RETVAL = boolSV (coro->flags & ix);
2133 OUTPUT:
2134 RETVAL
2135
2136void
2137throw (Coro::State self, SV *throw = &PL_sv_undef)
1049 PROTOTYPE: @ 2138 PROTOTYPE: $;$
1050 CODE: 2139 CODE:
1051 static SV *returnstk;
1052 SV *sv;
1053 AV *defav = GvAV (PL_defgv);
1054 struct coro *prev, *next;
1055
1056 if (!returnstk)
1057 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059 /* set up @_ -- ugly */
1060 av_clear (defav);
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); 2140 SvREFCNT_dec (self->throw);
2141 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1070 2142
1071 transfer(aTHX_ prev, next, 0); 2143void
2144api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2145
2146SV *
2147has_cctx (Coro::State coro)
2148 PROTOTYPE: $
2149 CODE:
2150 RETVAL = boolSV (!!coro->cctx);
2151 OUTPUT:
2152 RETVAL
2153
2154int
2155is_traced (Coro::State coro)
2156 PROTOTYPE: $
2157 CODE:
2158 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2159 OUTPUT:
2160 RETVAL
2161
2162UV
2163rss (Coro::State coro)
2164 PROTOTYPE: $
2165 ALIAS:
2166 usecount = 1
2167 CODE:
2168 switch (ix)
2169 {
2170 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2171 case 1: RETVAL = coro->usecount; break;
2172 }
2173 OUTPUT:
2174 RETVAL
2175
2176void
2177force_cctx ()
2178 CODE:
2179 struct coro *coro = SvSTATE (coro_current);
2180 coro->cctx->idle_sp = 0;
2181
2182void
2183swap_defsv (Coro::State self)
2184 PROTOTYPE: $
2185 ALIAS:
2186 swap_defav = 1
2187 CODE:
2188 if (!self->slot)
2189 croak ("cannot swap state with coroutine that has no saved state");
2190 else
2191 {
2192 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2193 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2194
2195 SV *tmp = *src; *src = *dst; *dst = tmp;
2196 }
1072 2197
1073MODULE = Coro::State PACKAGE = Coro 2198MODULE = Coro::State PACKAGE = Coro
1074 2199
1075# this is slightly dirty (should expose a c-level api)
1076
1077BOOT: 2200BOOT:
1078{ 2201{
1079 int i; 2202 int i;
2203
2204 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2205 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2206 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2207
2208 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2209 SvREADONLY_on (coro_current);
2210
1080 HV *stash = gv_stashpv ("Coro", TRUE); 2211 coro_stash = gv_stashpv ("Coro", TRUE);
1081 2212
1082 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2213 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2214 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2215 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2216 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2217 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2218 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 2219
1092 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2220 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093 coro_ready[i] = newAV (); 2221 coro_ready[i] = newAV ();
1094 2222
1095 { 2223 {
1096 SV *sv = perl_get_sv("Coro::API", 1); 2224 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1097 2225
1098 coroapi.schedule = api_schedule; 2226 coroapi.schedule = api_schedule;
1099 coroapi.cede = api_cede; 2227 coroapi.cede = api_cede;
2228 coroapi.cede_notself = api_cede_notself;
1100 coroapi.ready = api_ready; 2229 coroapi.ready = api_ready;
2230 coroapi.is_ready = api_is_ready;
1101 coroapi.nready = &coro_nready; 2231 coroapi.nready = &coro_nready;
1102 coroapi.current = coro_current; 2232 coroapi.current = coro_current;
1103 2233
1104 GCoroAPI = &coroapi; 2234 GCoroAPI = &coroapi;
1105 sv_setiv(sv, (IV)&coroapi); 2235 sv_setiv (sv, (IV)&coroapi);
1106 SvREADONLY_on(sv); 2236 SvREADONLY_on (sv);
1107 } 2237 }
1108} 2238}
1109 2239
1110#if !PERL_MICRO
1111
1112void 2240void
1113ready(self) 2241_set_current (SV *current)
1114 SV * self
1115 PROTOTYPE: $ 2242 PROTOTYPE: $
1116 CODE: 2243 CODE:
1117 api_ready (self); 2244 SvREFCNT_dec (SvRV (coro_current));
2245 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1118 2246
1119#endif 2247void
2248_set_readyhook (SV *hook)
2249 PROTOTYPE: $
2250 CODE:
2251 LOCK;
2252 SvREFCNT_dec (coro_readyhook);
2253 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2254 UNLOCK;
1120 2255
1121int 2256int
2257prio (Coro::State coro, int newprio = 0)
2258 ALIAS:
2259 nice = 1
2260 CODE:
2261{
2262 RETVAL = coro->prio;
2263
2264 if (items > 1)
2265 {
2266 if (ix)
2267 newprio = coro->prio - newprio;
2268
2269 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2270 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2271
2272 coro->prio = newprio;
2273 }
2274}
2275 OUTPUT:
2276 RETVAL
2277
2278SV *
2279ready (SV *self)
2280 PROTOTYPE: $
2281 CODE:
2282 RETVAL = boolSV (api_ready (self));
2283 OUTPUT:
2284 RETVAL
2285
2286int
1122nready(...) 2287nready (...)
1123 PROTOTYPE: 2288 PROTOTYPE:
1124 CODE: 2289 CODE:
1125 RETVAL = coro_nready; 2290 RETVAL = coro_nready;
1126 OUTPUT: 2291 OUTPUT:
1127 RETVAL 2292 RETVAL
1128 2293
2294# for async_pool speedup
1129void 2295void
1130schedule(...) 2296_pool_1 (SV *cb)
1131 PROTOTYPE:
1132 CODE: 2297 CODE:
1133 api_schedule (); 2298{
2299 struct coro *coro = SvSTATE (coro_current);
2300 HV *hv = (HV *)SvRV (coro_current);
2301 AV *defav = GvAV (PL_defgv);
2302 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2303 AV *invoke_av;
2304 int i, len;
2305
2306 if (!invoke)
2307 {
2308 SV *old = PL_diehook;
2309 PL_diehook = 0;
2310 SvREFCNT_dec (old);
2311 croak ("\3async_pool terminate\2\n");
2312 }
2313
2314 SvREFCNT_dec (coro->saved_deffh);
2315 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2316
2317 hv_store (hv, "desc", sizeof ("desc") - 1,
2318 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2319
2320 invoke_av = (AV *)SvRV (invoke);
2321 len = av_len (invoke_av);
2322
2323 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2324
2325 if (len > 0)
2326 {
2327 av_fill (defav, len - 1);
2328 for (i = 0; i < len; ++i)
2329 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2330 }
2331
2332 SvREFCNT_dec (invoke);
2333}
1134 2334
1135void 2335void
1136cede(...) 2336_pool_2 (SV *cb)
1137 PROTOTYPE:
1138 CODE: 2337 CODE:
2338{
2339 struct coro *coro = SvSTATE (coro_current);
2340
2341 sv_setsv (cb, &PL_sv_undef);
2342
2343 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2344 coro->saved_deffh = 0;
2345
2346 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2347 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2348 {
2349 SV *old = PL_diehook;
2350 PL_diehook = 0;
2351 SvREFCNT_dec (old);
2352 croak ("\3async_pool terminate\2\n");
2353 }
2354
2355 av_clear (GvAV (PL_defgv));
2356 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2357 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2358
2359 coro->prio = 0;
2360
2361 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2362 api_trace (coro_current, 0);
2363
2364 av_push (av_async_pool, newSVsv (coro_current));
2365}
2366
2367#if 0
2368
2369void
2370_generator_call (...)
2371 PROTOTYPE: @
2372 PPCODE:
2373 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2374 xxxx
2375 abort ();
2376
2377SV *
2378gensub (SV *sub, ...)
2379 PROTOTYPE: &;@
2380 CODE:
2381{
2382 struct coro *coro;
2383 MAGIC *mg;
2384 CV *xcv;
2385 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2386 int i;
2387
2388 CvGV (ncv) = CvGV (cv);
2389 CvFILE (ncv) = CvFILE (cv);
2390
2391 Newz (0, coro, 1, struct coro);
2392 coro->args = newAV ();
2393 coro->flags = CF_NEW;
2394
2395 av_extend (coro->args, items - 1);
2396 for (i = 1; i < items; i++)
2397 av_push (coro->args, newSVsv (ST (i)));
2398
2399 CvISXSUB_on (ncv);
2400 CvXSUBANY (ncv).any_ptr = (void *)coro;
2401
2402 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2403
2404 CvXSUB (ncv) = CvXSUB (xcv);
2405 CvANON_on (ncv);
2406
2407 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2408 RETVAL = newRV_noinc ((SV *)ncv);
2409}
2410 OUTPUT:
2411 RETVAL
2412
2413#endif
2414
2415
2416MODULE = Coro::State PACKAGE = Coro::AIO
2417
2418void
2419_get_state (SV *self)
2420 PPCODE:
2421{
2422 AV *defav = GvAV (PL_defgv);
2423 AV *av = newAV ();
2424 int i;
2425 SV *data_sv = newSV (sizeof (struct io_state));
2426 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2427 SvCUR_set (data_sv, sizeof (struct io_state));
2428 SvPOK_only (data_sv);
2429
2430 data->errorno = errno;
2431 data->laststype = PL_laststype;
2432 data->laststatval = PL_laststatval;
2433 data->statcache = PL_statcache;
2434
2435 av_extend (av, AvFILLp (defav) + 1 + 1);
2436
2437 for (i = 0; i <= AvFILLp (defav); ++i)
2438 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2439
2440 av_push (av, data_sv);
2441
2442 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2443
2444 api_ready (self);
2445}
2446
2447void
2448_set_state (SV *state)
2449 PROTOTYPE: $
2450 PPCODE:
2451{
2452 AV *av = (AV *)SvRV (state);
2453 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2454 int i;
2455
2456 errno = data->errorno;
2457 PL_laststype = data->laststype;
2458 PL_laststatval = data->laststatval;
2459 PL_statcache = data->statcache;
2460
2461 EXTEND (SP, AvFILLp (av));
2462 for (i = 0; i < AvFILLp (av); ++i)
2463 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2464}
2465
2466
2467MODULE = Coro::State PACKAGE = Coro::AnyEvent
2468
2469BOOT:
2470 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2471
2472SV *
2473_schedule (...)
2474 PROTOTYPE: @
2475 CODE:
2476{
2477 static int incede;
2478
1139 api_cede (); 2479 api_cede_notself ();
1140 2480
2481 ++incede;
2482 while (coro_nready >= incede && api_cede ())
2483 ;
2484
2485 sv_setsv (sv_activity, &PL_sv_undef);
2486 if (coro_nready >= incede)
2487 {
2488 PUSHMARK (SP);
2489 PUTBACK;
2490 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2491 SPAGAIN;
2492 }
2493
2494 --incede;
2495}
2496
2497
2498MODULE = Coro::State PACKAGE = PerlIO::cede
2499
2500BOOT:
2501 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2502

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