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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.285 by root, Mon Nov 17 04:17:20 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.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
10#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
11 48
12#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
13 52
14#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
15 55
16#define TRANSFER_SAVE_DEFAV 0x00000001 56#define PERL_VERSION_ATLEAST(a,b,c) \
17#define TRANSFER_SAVE_DEFSV 0x00000002 57 (PERL_REVISION > (a) \
18#define TRANSFER_SAVE_ERRSV 0x00000004 58 || (PERL_REVISION == (a) \
19#define TRANSFER_SAVE_CCTXT 0x00000008 59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
20 61
21#define TRANSFER_SAVE_ALL -1 62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
22 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
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#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147# if CORO_PTHREAD
148static void *coro_thx;
149# endif
150#endif
151
152/* helper storage struct for Coro::AIO */
153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
199typedef struct coro_cctx
200{
201 struct coro_cctx *next;
202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
211 coro_context cctx;
212
213 U32 gen;
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
23struct coro { 242struct coro {
24 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 244 coro_cctx *cctx;
26 void *sptr;
27 long ssize;
28 245
29 /* optionally saved, might be zero */ 246 /* state data */
30 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
31 SV *defsv;
32 SV *errsv;
33
34 /* saved global state not related to stacks */
35 U8 dowarn;
36
37 /* the stacks and related info (callchain etc..) */
38 PERL_SI *curstackinfo;
39 AV *curstack;
40 AV *mainstack; 248 AV *mainstack;
41 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
42 OP *op;
43 SV **curpad;
44 SV **stack_base;
45 SV **stack_max;
46 SV **tmps_stack;
47 I32 tmps_floor;
48 I32 tmps_ix;
49 I32 tmps_max;
50 I32 *markstack;
51 I32 *markstack_ptr;
52 I32 *markstack_max;
53 I32 *scopestack;
54 I32 scopestack_ix;
55 I32 scopestack_max;
56 ANY *savestack;
57 I32 savestack_ix;
58 I32 savestack_max;
59 OP **retstack;
60 I32 retstack_ix;
61 I32 retstack_max;
62 COP *curcop;
63 JMPENV start_env;
64 JMPENV *top_env;
65 250
66 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
67 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *throw; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
68}; 269};
69 270
70typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
72 273
73static AV *main_mainstack; /* used to differentiate between $main and others */ 274/* the following variables are effectively part of the perl context */
74static HV *coro_state_stash; 275/* and get copied between struct coro and these variables */
75static HV *padlist_cache; 276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278static SV *coro_throw;
76 279
77/* mostly copied from op.c:cv_clone2 */ 280/** Coro ********************************************************************/
78STATIC AV * 281
79clone_padlist (AV *protopadlist) 282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
80{ 300{
81 AV *av; 301#if PERL_VERSION_ATLEAST (5,10,0)
82 I32 ix; 302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 303 get_sv (name, create);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 304#endif
85 SV **pname = AvARRAY (protopad_name); 305 return get_sv (name, create);
86 SV **ppad = AvARRAY (protopad); 306}
87 I32 fname = AvFILLp (protopad_name); 307
88 I32 fpad = AvFILLp (protopad); 308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
329coro_clone_padlist (pTHX_ CV *cv)
330{
331 AV *padlist = CvPADLIST (cv);
89 AV *newpadlist, *newpad_name, *newpad; 332 AV *newpadlist, *newpad;
90 SV **npad;
91
92 newpad_name = newAV ();
93 for (ix = fname; ix >= 0; ix--)
94 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
95
96 newpad = newAV ();
97 av_fill (newpad, AvFILLp (protopad));
98 npad = AvARRAY (newpad);
99 333
100 newpadlist = newAV (); 334 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist);
343
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
104 346
105 av = newAV (); /* will be @_ */ 347 return newpadlist;
106 av_extend (av, 0); 348}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 349
110 for (ix = fpad; ix > 0; ix--) 350static void
351free_padlist (pTHX_ AV *padlist)
352{
353 /* may be during global destruction */
354 if (SvREFCNT (padlist))
111 { 355 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 356 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 357 while (i >= 0)
114 { 358 {
115 char *name = SvPVX (namesv); /* XXX */ 359 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 360 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 361 {
120 else
121 { /* our own lexical */
122 SV *sv; 362 SV *sv;
123 if (*name == '&') 363 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 364 SvREFCNT_dec (sv);
125 else if (*name == '@') 365
126 sv = (SV *) newAV (); 366 SvREFCNT_dec (*svp);
127 else if (*name == '%')
128 sv = (SV *) newHV ();
129 else
130 sv = NEWSV (0, 0);
131 if (!SvPADBUSY (sv))
132 SvPADMY_on (sv);
133 npad[ix] = sv;
134 } 367 }
135 } 368 }
136 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
137 {
138 npad[ix] = SvREFCNT_inc (ppad[ix]);
139 }
140 else
141 {
142 SV *sv = NEWSV (0, 0);
143 SvPADTMP_on (sv);
144 npad[ix] = sv;
145 }
146 }
147 369
148#if 0 /* return -ENOTUNDERSTOOD */
149 /* Now that vars are all in place, clone nested closures. */
150
151 for (ix = fpad; ix > 0; ix--) {
152 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
153 if (namesv
154 && namesv != &PL_sv_undef
155 && !(SvFLAGS(namesv) & SVf_FAKE)
156 && *SvPVX(namesv) == '&'
157 && CvCLONE(ppad[ix]))
158 {
159 CV *kid = cv_clone((CV*)ppad[ix]);
160 SvREFCNT_dec(ppad[ix]);
161 CvCLONE_on(kid);
162 SvPADMY_on(kid);
163 npad[ix] = (SV*)kid;
164 }
165 }
166#endif
167
168 return newpadlist;
169}
170
171#ifdef MAY_FLUSH
172STATIC AV *
173free_padlist (AV *padlist)
174{
175 /* may be during global destruction */
176 if (SvREFCNT(padlist))
177 {
178 I32 i = AvFILLp(padlist);
179 while (i >= 0)
180 {
181 SV **svp = av_fetch(padlist, i--, FALSE);
182 SV *sv = svp ? *svp : Nullsv;
183 if (sv)
184 SvREFCNT_dec(sv);
185 }
186
187 SvREFCNT_dec((SV*)padlist); 370 SvREFCNT_dec ((SV*)padlist);
188 } 371 }
189} 372}
190#endif 373
374static int
375coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
376{
377 AV *padlist;
378 AV *av = (AV *)mg->mg_obj;
379
380 /* casting is fun. */
381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
382 free_padlist (aTHX_ padlist);
383
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385
386 return 0;
387}
388
389#define CORO_MAGIC_type_cv PERL_MAGIC_ext
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC(sv, type) \
398 expect_true (SvMAGIC (sv)) \
399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
400 ? SvMAGIC (sv) \
401 : mg_find (sv, type) \
402 : 0
403
404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
408SvSTATE_ (pTHX_ SV *coro)
409{
410 HV *stash;
411 MAGIC *mg;
412
413 if (SvROK (coro))
414 coro = SvRV (coro);
415
416 if (expect_false (SvTYPE (coro) != SVt_PVHV))
417 croak ("Coro::State object required");
418
419 stash = SvSTASH (coro);
420 if (expect_false (stash != coro_stash && stash != coro_state_stash))
421 {
422 /* very slow, but rare, check */
423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
424 croak ("Coro::State object required");
425 }
426
427 mg = CORO_MAGIC_state (coro);
428 return (struct coro *)mg->mg_ptr;
429}
430
431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
191 445
192/* the next two functions merely cache the padlists */ 446/* the next two functions merely cache the padlists */
193STATIC void 447static void
194get_padlist (CV *cv) 448get_padlist (pTHX_ CV *cv)
195{ 449{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 450 MAGIC *mg = CORO_MAGIC_cv (cv);
451 AV *av;
197 452
198 if (he && AvFILLp ((AV *)*he) >= 0) 453 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 454 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 455 else
201 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
202}
203
204STATIC void
205put_padlist (CV *cv)
206{
207 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
208
209 if (SvTYPE (*he) != SVt_PVAV)
210 { 456 {
457#if CORO_PREFER_PERL_FUNCTIONS
458 /* this is probably cleaner? but also slower! */
459 /* in practise, it seems to be less stable */
460 CV *cp = Perl_cv_clone (cv);
461 CvPADLIST (cv) = CvPADLIST (cp);
462 CvPADLIST (cp) = 0;
211 SvREFCNT_dec (*he); 463 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 464#else
465 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
466#endif
213 } 467 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 468}
217 469
218#ifdef MAY_FLUSH
219STATIC void
220flush_padlist_cache ()
221{
222 HV *hv = padlist_cache;
223 padlist_cache = newHV ();
224
225 if (hv_iterinit (hv))
226 {
227 HE *he;
228 AV *padlist;
229
230 while (!!(he = hv_iternext (hv)))
231 {
232 AV *av = (AV *)HeVAL(he);
233
234 /* casting is fun. */
235 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
236 free_padlist (padlist);
237 }
238 }
239
240 SvREFCNT_dec (hv);
241}
242#endif
243
244#define SB do {
245#define SE } while (0)
246
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
249
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
251
252static void 470static void
471put_padlist (pTHX_ CV *cv)
472{
473 MAGIC *mg = CORO_MAGIC_cv (cv);
474 AV *av;
475
476 if (expect_false (!mg))
477 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
478
479 av = (AV *)mg->mg_obj;
480
481 if (expect_false (AvFILLp (av) >= AvMAX (av)))
482 av_extend (av, AvMAX (av) + 1);
483
484 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
485}
486
487/** load & save, init *******************************************************/
488
489static void
253load_state(pTHX_ Coro__State c) 490load_perl (pTHX_ Coro__State c)
254{ 491{
255 PL_dowarn = c->dowarn; 492 perl_slots *slot = c->slot;
493 c->slot = 0;
256 494
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 495 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_stack_base = c->stack_base;
264 PL_stack_max = c->stack_max;
265 PL_tmps_stack = c->tmps_stack;
266 PL_tmps_floor = c->tmps_floor;
267 PL_tmps_ix = c->tmps_ix;
268 PL_tmps_max = c->tmps_max;
269 PL_markstack = c->markstack;
270 PL_markstack_ptr = c->markstack_ptr;
271 PL_markstack_max = c->markstack_max;
272 PL_scopestack = c->scopestack;
273 PL_scopestack_ix = c->scopestack_ix;
274 PL_scopestack_max = c->scopestack_max;
275 PL_savestack = c->savestack;
276 PL_savestack_ix = c->savestack_ix;
277 PL_savestack_max = c->savestack_max;
278 PL_retstack = c->retstack;
279 PL_retstack_ix = c->retstack_ix;
280 PL_retstack_max = c->retstack_max;
281 PL_curcop = c->curcop;
282 PL_start_env = c->start_env;
283 PL_top_env = c->top_env;
284 496
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 497 GvSV (PL_defgv) = slot->defsv;
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 498 GvAV (PL_defgv) = slot->defav;
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 499 GvSV (PL_errgv) = slot->errsv;
500 GvSV (irsgv) = slot->irsgv;
501
502 #define VAR(name,type) PL_ ## name = slot->name;
503 # include "state.h"
504 #undef VAR
288 505
289 { 506 {
290 dSP; 507 dSP;
508
291 CV *cv; 509 CV *cv;
292 510
293 /* now do the ugly restore mess */ 511 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 512 while (expect_true (cv = (CV *)POPs))
295 { 513 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 514 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 515 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 516 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 517 }
309 518
310 PUTBACK; 519 PUTBACK;
311 } 520 }
312}
313 521
522 slf_frame = c->slf_frame;
523 coro_throw = c->throw;
524}
525
314static void 526static void
315save_state(pTHX_ Coro__State c, int flags) 527save_perl (pTHX_ Coro__State c)
316{ 528{
529 c->throw = coro_throw;
530 c->slf_frame = slf_frame;
531
317 { 532 {
318 dSP; 533 dSP;
319 I32 cxix = cxstack_ix; 534 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 535 PERL_CONTEXT *ccstk = cxstack;
321 PERL_SI *top_si = PL_curstackinfo; 536 PERL_SI *top_si = PL_curstackinfo;
… …
323 /* 538 /*
324 * the worst thing you can imagine happens first - we have to save 539 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 540 * (and reinitialize) all cv's in the whole callchain :(
326 */ 541 */
327 542
328 PUSHs (Nullsv); 543 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 544 /* this loop was inspired by pp_caller */
330 for (;;) 545 for (;;)
331 { 546 {
332 do 547 while (expect_true (cxix >= 0))
333 { 548 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 549 PERL_CONTEXT *cx = &ccstk[cxix--];
335 550
336 if (CxTYPE(cx) == CXt_SUB) 551 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 552 {
338 CV *cv = cx->blk_sub.cv; 553 CV *cv = cx->blk_sub.cv;
554
339 if (CvDEPTH(cv)) 555 if (expect_true (CvDEPTH (cv)))
340 { 556 {
341#ifdef USE_THREADS
342 /*XPUSHs ((SV *)CvOWNER(cv));*/
343 /*CvOWNER(cv) = 0;*/
344 /*error must unlock this cv etc.. etc...*/
345#endif
346 EXTEND (SP, CvDEPTH(cv)*2); 557 EXTEND (SP, 3);
347
348 while (--CvDEPTH(cv))
349 {
350 /* this tells the restore code to increment CvDEPTH */
351 PUSHs (Nullsv);
352 PUSHs ((SV *)cv);
353 }
354
355 PUSHs ((SV *)CvPADLIST(cv)); 558 PUSHs ((SV *)CvPADLIST (cv));
559 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 560 PUSHs ((SV *)cv);
357 561
358 get_padlist (cv); /* this is a monster */ 562 CvDEPTH (cv) = 0;
563 get_padlist (aTHX_ cv);
359 } 564 }
360 } 565 }
361 else if (CxTYPE(cx) == CXt_FORMAT)
362 {
363 /* I never used formats, so how should I know how these are implemented? */
364 /* my bold guess is as a simple, plain sub... */
365 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366 }
367 } 566 }
368 while (cxix >= 0);
369 567
370 if (top_si->si_type == PERLSI_MAIN) 568 if (expect_true (top_si->si_type == PERLSI_MAIN))
371 break; 569 break;
372 570
373 top_si = top_si->si_prev; 571 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 572 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 573 cxix = top_si->si_cxix;
376 } 574 }
377 575
378 PUTBACK; 576 PUTBACK;
379 } 577 }
380 578
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 579 /* allocate some space on the context stack for our purposes */
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 580 /* we manually unroll here, as usually 2 slots is enough */
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 581 if (SLOT_COUNT >= 1) CXINC;
582 if (SLOT_COUNT >= 2) CXINC;
583 if (SLOT_COUNT >= 3) CXINC;
584 {
585 int i;
586 for (i = 3; i < SLOT_COUNT; ++i)
587 CXINC;
588 }
589 cxstack_ix -= SLOT_COUNT; /* undo allocation */
384 590
385 /* I have not the slightest idea of why av_reify is necessary */
386 /* but if it's missing the defav contents magically get replaced sometimes */
387 if (c->defav)
388 av_reify (c->defav);
389
390 c->dowarn = PL_dowarn;
391
392 c->curstackinfo = PL_curstackinfo;
393 c->curstack = PL_curstack;
394 c->mainstack = PL_mainstack; 591 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp; 592
396 c->op = PL_op; 593 {
397 c->curpad = PL_curpad; 594 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
398 c->stack_base = PL_stack_base; 595
399 c->stack_max = PL_stack_max; 596 slot->defav = GvAV (PL_defgv);
400 c->tmps_stack = PL_tmps_stack; 597 slot->defsv = DEFSV;
401 c->tmps_floor = PL_tmps_floor; 598 slot->errsv = ERRSV;
402 c->tmps_ix = PL_tmps_ix; 599 slot->irsgv = GvSV (irsgv);
403 c->tmps_max = PL_tmps_max; 600
404 c->markstack = PL_markstack; 601 #define VAR(name,type) slot->name = PL_ ## name;
405 c->markstack_ptr = PL_markstack_ptr; 602 # include "state.h"
406 c->markstack_max = PL_markstack_max; 603 #undef VAR
407 c->scopestack = PL_scopestack; 604 }
408 c->scopestack_ix = PL_scopestack_ix;
409 c->scopestack_max = PL_scopestack_max;
410 c->savestack = PL_savestack;
411 c->savestack_ix = PL_savestack_ix;
412 c->savestack_max = PL_savestack_max;
413 c->retstack = PL_retstack;
414 c->retstack_ix = PL_retstack_ix;
415 c->retstack_max = PL_retstack_max;
416 c->curcop = PL_curcop;
417 c->start_env = PL_start_env;
418 c->top_env = PL_top_env;
419} 605}
420 606
421/* 607/*
422 * allocate various perl stacks. This is an exact copy 608 * allocate various perl stacks. This is almost an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 609 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 610 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 611 * not usually need a lot of stackspace.
426 */ 612 */
427STATIC void 613#if CORO_PREFER_PERL_FUNCTIONS
614# define coro_init_stacks init_stacks
615#else
616static void
428coro_init_stacks (pTHX) 617coro_init_stacks (pTHX)
429{ 618{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 619 PL_curstackinfo = new_stackinfo(32, 8);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 620 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 621 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 622 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 623
435 PL_stack_base = AvARRAY(PL_curstack); 624 PL_stack_base = AvARRAY(PL_curstack);
436 PL_stack_sp = PL_stack_base; 625 PL_stack_sp = PL_stack_base;
437 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 626 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438 627
439 New(50,PL_tmps_stack,64,SV*); 628 New(50,PL_tmps_stack,32,SV*);
440 PL_tmps_floor = -1; 629 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 630 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 631 PL_tmps_max = 32;
443 632
444 New(54,PL_markstack,12,I32); 633 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 634 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 635 PL_markstack_max = PL_markstack + 16;
447 636
637#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 638 SET_MARK_OFFSET;
639#endif
449 640
450 New(54,PL_scopestack,12,I32); 641 New(54,PL_scopestack,8,I32);
451 PL_scopestack_ix = 0; 642 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 643 PL_scopestack_max = 8;
453 644
454 New(54,PL_savestack,64,ANY); 645 New(54,PL_savestack,24,ANY);
455 PL_savestack_ix = 0; 646 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 647 PL_savestack_max = 24;
457 648
649#if !PERL_VERSION_ATLEAST (5,10,0)
458 New(54,PL_retstack,8,OP*); 650 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 651 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 652 PL_retstack_max = 4;
653#endif
461} 654}
655#endif
462 656
463/* 657/*
464 * destroy the stacks, the callchain etc... 658 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 659 */
467STATIC void 660static void
468destroy_stacks(pTHX) 661coro_destruct_stacks (pTHX)
469{ 662{
470 /* is this ugly, I ask? */
471 while (PL_scopestack_ix)
472 LEAVE;
473
474 /* sure it is, but more important: is it correct?? :/ */
475 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476 FREETMPS;
477
478 while (PL_curstackinfo->si_next) 663 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 664 PL_curstackinfo = PL_curstackinfo->si_next;
480 665
481 while (PL_curstackinfo) 666 while (PL_curstackinfo)
482 { 667 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 668 PERL_SI *p = PL_curstackinfo->si_prev;
484 669
485 { 670 if (!IN_DESTRUCT)
486 dSP;
487 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488 PUTBACK; /* possibly superfluous */
489 }
490
491 dounwind(-1);
492
493 SvREFCNT_dec(PL_curstackinfo->si_stack); 671 SvREFCNT_dec (PL_curstackinfo->si_stack);
672
494 Safefree(PL_curstackinfo->si_cxstack); 673 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 674 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 675 PL_curstackinfo = p;
497 } 676 }
498 677
499 Safefree(PL_tmps_stack); 678 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 679 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 680 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 681 Safefree (PL_savestack);
682#if !PERL_VERSION_ATLEAST (5,10,0)
503 Safefree(PL_retstack); 683 Safefree (PL_retstack);
504}
505
506static void
507allocate_stack (Coro__State ctx)
508{
509#ifdef HAVE_MMAP
510 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
511 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
512 if (ctx->sptr == (void *)-1)
513#endif 684#endif
514 { 685}
515 /*FIXME*//*D*//* reasonable stack size! */ 686
516 ctx->ssize = 4096 * sizeof (long); 687static size_t
517 New (0, ctx->sptr, 4096, long); 688coro_rss (pTHX_ struct coro *coro)
689{
690 size_t rss = sizeof (*coro);
691
692 if (coro->mainstack)
518 } 693 {
519} 694 perl_slots tmp_slot;
695 perl_slots *slot;
520 696
697 if (coro->flags & CF_RUNNING)
698 {
699 slot = &tmp_slot;
700
701 #define VAR(name,type) slot->name = PL_ ## name;
702 # include "state.h"
703 #undef VAR
704 }
705 else
706 slot = coro->slot;
707
708 if (slot)
709 {
710 rss += sizeof (slot->curstackinfo);
711 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
713 rss += slot->tmps_max * sizeof (SV *);
714 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
715 rss += slot->scopestack_max * sizeof (I32);
716 rss += slot->savestack_max * sizeof (ANY);
717
718#if !PERL_VERSION_ATLEAST (5,10,0)
719 rss += slot->retstack_max * sizeof (OP *);
720#endif
721 }
722 }
723
724 return rss;
725}
726
727/** coroutine stack handling ************************************************/
728
729static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
730static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
731static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
732
733/* apparently < 5.8.8 */
734#ifndef MgPV_nolen_const
735#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
736 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
737 (const char*)(mg)->mg_ptr)
738#endif
739
740/*
741 * This overrides the default magic get method of %SIG elements.
742 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
743 * and instead of tryign to save and restore the hash elements, we just provide
744 * readback here.
745 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
746 * not expecting this to actually change the hook. This is a potential problem
747 * when a schedule happens then, but we ignore this.
748 */
521static void 749static int
522deallocate_stack (Coro__State ctx) 750coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
523{ 751{
524#ifdef HAVE_MMAP 752 const char *s = MgPV_nolen_const (mg);
525 munmap (ctx->sptr, ctx->ssize);
526#else
527 Safefree (ctx->sptr);
528#endif
529}
530 753
531/* might go away together with optional SAVE_CCTXT */ 754 if (*s == '_')
755 {
756 SV **svp = 0;
757
758 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
759 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
760
761 if (svp)
762 {
763 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
764 return 0;
765 }
766 }
767
768 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
769}
770
532static void 771static int
533setup_coro (void *arg) 772coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
773{
774 const char *s = MgPV_nolen_const (mg);
775
776 if (*s == '_')
777 {
778 SV **svp = 0;
779
780 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
781 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
782
783 if (svp)
784 {
785 SV *old = *svp;
786 *svp = 0;
787 SvREFCNT_dec (old);
788 return 0;
789 }
790 }
791
792 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
793}
794
795static int
796coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
797{
798 const char *s = MgPV_nolen_const (mg);
799
800 if (*s == '_')
801 {
802 SV **svp = 0;
803
804 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806
807 if (svp)
808 {
809 SV *old = *svp;
810 *svp = newSVsv (sv);
811 SvREFCNT_dec (old);
812 return 0;
813 }
814 }
815
816 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
817}
818
819static void
820prepare_nop (pTHX_ struct coro_transfer_args *ta)
821{
822 /* kind of mega-hacky, but works */
823 ta->next = ta->prev = (struct coro *)ta;
824}
825
826static int
827slf_check_nop (pTHX_ struct CoroSLF *frame)
828{
829 return 0;
830}
831
832static void NOINLINE /* noinline to keep it out of the transfer fast path */
833coro_setup (pTHX_ struct coro *coro)
534{ 834{
535 /* 835 /*
536 * emulate part of the perl startup here. 836 * emulate part of the perl startup here.
537 */ 837 */
838 coro_init_stacks (aTHX);
839
840 PL_runops = RUNOPS_DEFAULT;
841 PL_curcop = &PL_compiling;
842 PL_in_eval = EVAL_NULL;
843 PL_comppad = 0;
844 PL_curpm = 0;
845 PL_curpad = 0;
846 PL_localizing = 0;
847 PL_dirty = 0;
848 PL_restartop = 0;
849#if PERL_VERSION_ATLEAST (5,10,0)
850 PL_parser = 0;
851#endif
852
853 /* recreate the die/warn hooks */
854 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
855 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
856
857 GvSV (PL_defgv) = newSV (0);
858 GvAV (PL_defgv) = coro->args; coro->args = 0;
859 GvSV (PL_errgv) = newSV (0);
860 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
861 PL_rs = newSVsv (GvSV (irsgv));
862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
863
864 {
865 dSP;
866 UNOP myop;
867
868 Zero (&myop, 1, UNOP);
869 myop.op_next = Nullop;
870 myop.op_flags = OPf_WANT_VOID;
871
872 PUSHMARK (SP);
873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
874 PUTBACK;
875 PL_op = (OP *)&myop;
876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
877 SPAGAIN;
878 }
879
880 /* this newly created coroutine might be run on an existing cctx which most
881 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
882 */
883 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
884 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
885
886 coro_throw = coro->throw;
887}
888
889static void
890coro_destruct (pTHX_ struct coro *coro)
891{
892 if (!IN_DESTRUCT)
893 {
894 /* restore all saved variables and stuff */
895 LEAVE_SCOPE (0);
896 assert (PL_tmps_floor == -1);
897
898 /* free all temporaries */
899 FREETMPS;
900 assert (PL_tmps_ix == -1);
901
902 /* unwind all extra stacks */
903 POPSTACK_TO (PL_mainstack);
904
905 /* unwind main stack */
906 dounwind (-1);
907 }
908
909 SvREFCNT_dec (GvSV (PL_defgv));
910 SvREFCNT_dec (GvAV (PL_defgv));
911 SvREFCNT_dec (GvSV (PL_errgv));
912 SvREFCNT_dec (PL_defoutgv);
913 SvREFCNT_dec (PL_rs);
914 SvREFCNT_dec (GvSV (irsgv));
915
916 SvREFCNT_dec (PL_diehook);
917 SvREFCNT_dec (PL_warnhook);
918
919 SvREFCNT_dec (coro->saved_deffh);
920 SvREFCNT_dec (coro_throw);
921
922 coro_destruct_stacks (aTHX);
923}
924
925INLINE void
926free_coro_mortal (pTHX)
927{
928 if (expect_true (coro_mortal))
929 {
930 SvREFCNT_dec (coro_mortal);
931 coro_mortal = 0;
932 }
933}
934
935static int
936runops_trace (pTHX)
937{
938 COP *oldcop = 0;
939 int oldcxix = -2;
940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
941 coro_cctx *cctx = coro->cctx;
942
943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
944 {
945 PERL_ASYNC_CHECK ();
946
947 if (cctx->flags & CC_TRACE_ALL)
948 {
949 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
950 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952 SV **bot, **top;
953 AV *av = newAV (); /* return values */
954 SV **cb;
955 dSP;
956
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 bot = PL_stack_base + cx->blk_oldsp + 1;
963 top = cx->blk_gimme == G_ARRAY ? SP + 1
964 : cx->blk_gimme == G_SCALAR ? bot + 1
965 : bot;
966
967 av_extend (av, top - bot);
968 while (bot < top)
969 av_push (av, SvREFCNT_inc_NN (*bot++));
970
971 PL_runops = RUNOPS_DEFAULT;
972 ENTER;
973 SAVETMPS;
974 EXTEND (SP, 3);
975 PUSHMARK (SP);
976 PUSHs (&PL_sv_no);
977 PUSHs (fullname);
978 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
979 PUTBACK;
980 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
981 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
982 SPAGAIN;
983 FREETMPS;
984 LEAVE;
985 PL_runops = runops_trace;
986 }
987
988 if (oldcop != PL_curcop)
989 {
990 oldcop = PL_curcop;
991
992 if (PL_curcop != &PL_compiling)
993 {
994 SV **cb;
995
996 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
997 {
998 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
999
1000 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1001 {
1002 runops_proc_t old_runops = PL_runops;
1003 dSP;
1004 GV *gv = CvGV (cx->blk_sub.cv);
1005 SV *fullname = sv_2mortal (newSV (0));
1006
1007 if (isGV (gv))
1008 gv_efullname3 (fullname, gv, 0);
1009
1010 PL_runops = RUNOPS_DEFAULT;
1011 ENTER;
1012 SAVETMPS;
1013 EXTEND (SP, 3);
1014 PUSHMARK (SP);
1015 PUSHs (&PL_sv_yes);
1016 PUSHs (fullname);
1017 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1018 PUTBACK;
1019 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1020 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1021 SPAGAIN;
1022 FREETMPS;
1023 LEAVE;
1024 PL_runops = runops_trace;
1025 }
1026
1027 oldcxix = cxstack_ix;
1028 }
1029
1030 if (cctx->flags & CC_TRACE_LINE)
1031 {
1032 dSP;
1033
1034 PL_runops = RUNOPS_DEFAULT;
1035 ENTER;
1036 SAVETMPS;
1037 EXTEND (SP, 3);
1038 PL_runops = RUNOPS_DEFAULT;
1039 PUSHMARK (SP);
1040 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1041 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1042 PUTBACK;
1043 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1044 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1045 SPAGAIN;
1046 FREETMPS;
1047 LEAVE;
1048 PL_runops = runops_trace;
1049 }
1050 }
1051 }
1052 }
1053 }
1054
1055 TAINT_NOT;
1056 return 0;
1057}
1058
1059static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1061{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0;
1064}
1065
1066/* inject a fake call to Coro::State::_cctx_init into the execution */
1067/* _cctx_init should be careful, as it could be called at almost any time */
1068/* during execution of a perl program */
1069/* also initialises PL_top_env */
1070static void NOINLINE
1071cctx_prepare (pTHX_ coro_cctx *cctx)
1072{
538 dSP; 1073 dSP;
539 Coro__State ctx = (Coro__State)arg; 1074 UNOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 1075
542 coro_init_stacks (aTHX); 1076 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 1077
1078 if (cctx->flags & CC_TRACE)
1079 PL_runops = runops_trace;
1080
1081 Zero (&myop, 1, UNOP);
1082 myop.op_next = PL_op;
1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1084
1085 PUSHMARK (SP);
1086 EXTEND (SP, 2);
1087 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1089 PUTBACK;
1090 PL_op = (OP *)&myop;
1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 1092 SPAGAIN;
1093}
545 1094
546 /*PL_curcop = 0;*/ 1095/* the tail of transfer: execute stuff we can only do after a transfer */
547 SvREFCNT_dec (GvAV (PL_defgv)); 1096INLINE void
548 GvAV (PL_defgv) = ctx->args; 1097transfer_tail (pTHX)
1098{
1099 free_coro_mortal (aTHX);
1100}
549 1101
1102/*
1103 * this is a _very_ stripped down perl interpreter ;)
1104 */
1105static void
1106cctx_run (void *arg)
1107{
1108#ifdef USE_ITHREADS
1109# if CORO_PTHREAD
1110 PERL_SET_CONTEXT (coro_thx);
1111# endif
1112#endif
1113 {
1114 dTHX;
1115
1116 /* normally we would need to skip the entersub here */
1117 /* not doing so will re-execute it, which is exactly what we want */
1118 /* PL_nop = PL_nop->op_next */
1119
1120 /* inject a fake subroutine call to cctx_init */
1121 cctx_prepare (aTHX_ (coro_cctx *)arg);
1122
1123 /* cctx_run is the alternative tail of transfer() */
1124 transfer_tail (aTHX);
1125
1126 /* somebody or something will hit me for both perl_run and PL_restartop */
1127 PL_restartop = PL_op;
1128 perl_run (PL_curinterp);
1129
1130 /*
1131 * If perl-run returns we assume exit() was being called or the coro
1132 * fell off the end, which seems to be the only valid (non-bug)
1133 * reason for perl_run to return. We try to exit by jumping to the
1134 * bootstrap-time "top" top_env, as we cannot restore the "main"
1135 * coroutine as Coro has no such concept
1136 */
1137 PL_top_env = main_top_env;
1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 }
1140}
1141
1142static coro_cctx *
1143cctx_new ()
1144{
1145 coro_cctx *cctx;
1146
1147 ++cctx_count;
1148 New (0, cctx, 1, coro_cctx);
1149
1150 cctx->gen = cctx_gen;
1151 cctx->flags = 0;
1152 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1153
1154 return cctx;
1155}
1156
1157/* create a new cctx only suitable as source */
1158static coro_cctx *
1159cctx_new_empty ()
1160{
1161 coro_cctx *cctx = cctx_new ();
1162
1163 cctx->sptr = 0;
1164 coro_create (&cctx->cctx, 0, 0, 0, 0);
1165
1166 return cctx;
1167}
1168
1169/* create a new cctx suitable as destination/running a perl interpreter */
1170static coro_cctx *
1171cctx_new_run ()
1172{
1173 coro_cctx *cctx = cctx_new ();
1174 void *stack_start;
1175 size_t stack_size;
1176
1177#if HAVE_MMAP
1178 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1179 /* mmap supposedly does allocate-on-write for us */
1180 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1181
1182 if (cctx->sptr != (void *)-1)
1183 {
1184 #if CORO_STACKGUARD
1185 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1186 #endif
1187 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1188 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1189 cctx->flags |= CC_MAPPED;
1190 }
1191 else
1192#endif
1193 {
1194 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1195 New (0, cctx->sptr, cctx_stacksize, long);
1196
1197 if (!cctx->sptr)
1198 {
1199 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1200 _exit (EXIT_FAILURE);
1201 }
1202
1203 stack_start = cctx->sptr;
1204 stack_size = cctx->ssize;
1205 }
1206
1207 #if CORO_USE_VALGRIND
1208 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1209 #endif
1210
1211 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1212
1213 return cctx;
1214}
1215
1216static void
1217cctx_destroy (coro_cctx *cctx)
1218{
1219 if (!cctx)
1220 return;
1221
1222 --cctx_count;
1223 coro_destroy (&cctx->cctx);
1224
1225 /* coro_transfer creates new, empty cctx's */
550 if (ctx->sptr) 1226 if (cctx->sptr)
1227 {
1228 #if CORO_USE_VALGRIND
1229 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1230 #endif
1231
1232#if HAVE_MMAP
1233 if (cctx->flags & CC_MAPPED)
1234 munmap (cctx->sptr, cctx->ssize);
1235 else
1236#endif
1237 Safefree (cctx->sptr);
551 { 1238 }
1239
1240 Safefree (cctx);
1241}
1242
1243/* wether this cctx should be destructed */
1244#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1245
1246static coro_cctx *
1247cctx_get (pTHX)
1248{
1249 while (expect_true (cctx_first))
1250 {
1251 coro_cctx *cctx = cctx_first;
1252 cctx_first = cctx->next;
1253 --cctx_idle;
1254
1255 if (expect_true (!CCTX_EXPIRED (cctx)))
1256 return cctx;
1257
1258 cctx_destroy (cctx);
1259 }
1260
1261 return cctx_new_run ();
1262}
1263
1264static void
1265cctx_put (coro_cctx *cctx)
1266{
1267 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1268
1269 /* free another cctx if overlimit */
1270 if (expect_false (cctx_idle >= cctx_max_idle))
1271 {
1272 coro_cctx *first = cctx_first;
1273 cctx_first = first->next;
1274 --cctx_idle;
1275
1276 cctx_destroy (first);
1277 }
1278
1279 ++cctx_idle;
1280 cctx->next = cctx_first;
1281 cctx_first = cctx;
1282}
1283
1284/** coroutine switching *****************************************************/
1285
1286static void
1287transfer_check (pTHX_ struct coro *prev, struct coro *next)
1288{
1289 /* TODO: throwing up here is considered harmful */
1290
1291 if (expect_true (prev != next))
1292 {
1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1295
1296 if (expect_false (next->flags & CF_RUNNING))
1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1298
1299 if (expect_false (next->flags & CF_DESTROYED))
1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1301
1302#if !PERL_VERSION_ATLEAST (5,10,0)
1303 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1305#endif
1306 }
1307}
1308
1309/* always use the TRANSFER macro */
1310static void NOINLINE /* noinline so we have a fixed stackframe */
1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1312{
1313 dSTACKLEVEL;
1314
1315 /* sometimes transfer is only called to set idle_sp */
1316 if (expect_false (!next))
1317 {
1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1320 }
1321 else if (expect_true (prev != next))
1322 {
1323 coro_cctx *prev__cctx;
1324
1325 if (expect_false (prev->flags & CF_NEW))
1326 {
1327 /* create a new empty/source context */
1328 prev->cctx = cctx_new_empty ();
1329 prev->flags &= ~CF_NEW;
1330 prev->flags |= CF_RUNNING;
1331 }
1332
1333 prev->flags &= ~CF_RUNNING;
1334 next->flags |= CF_RUNNING;
1335
1336 /* first get rid of the old state */
1337 save_perl (aTHX_ prev);
1338
1339 if (expect_false (next->flags & CF_NEW))
1340 {
1341 /* need to start coroutine */
1342 next->flags &= ~CF_NEW;
1343 /* setup coroutine call */
1344 coro_setup (aTHX_ next);
1345 }
1346 else
1347 load_perl (aTHX_ next);
1348
1349 prev__cctx = prev->cctx;
1350
1351 /* possibly untie and reuse the cctx */
1352 if (expect_true (
1353 prev__cctx->idle_sp == (void *)stacklevel
1354 && !(prev__cctx->flags & CC_TRACE)
1355 && !force_cctx
1356 ))
1357 {
1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1359 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1360
1361 prev->cctx = 0;
1362
1363 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1365 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1366 if (!next->cctx)
1367 next->cctx = cctx_get (aTHX);
1368
1369 cctx_put (prev__cctx);
1370 }
1371
1372 ++next->usecount;
1373
1374 if (expect_true (!next->cctx))
1375 next->cctx = cctx_get (aTHX);
1376
1377 if (expect_false (prev__cctx != next->cctx))
1378 {
1379 prev__cctx->top_env = PL_top_env;
1380 PL_top_env = next->cctx->top_env;
1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1382 }
1383
1384 transfer_tail (aTHX);
1385 }
1386}
1387
1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1390
1391/** high level stuff ********************************************************/
1392
1393static int
1394coro_state_destroy (pTHX_ struct coro *coro)
1395{
1396 if (coro->flags & CF_DESTROYED)
1397 return 0;
1398
1399 if (coro->on_destroy)
1400 coro->on_destroy (aTHX_ coro);
1401
1402 coro->flags |= CF_DESTROYED;
1403
1404 if (coro->flags & CF_READY)
1405 {
1406 /* reduce nready, as destroying a ready coro effectively unreadies it */
1407 /* alternative: look through all ready queues and remove the coro */
1408 --coro_nready;
1409 }
1410 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412
1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1414 {
1415 struct coro temp;
1416
1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418
1419 save_perl (aTHX_ &temp);
1420 load_perl (aTHX_ coro);
1421
1422 coro_destruct (aTHX_ coro);
1423
1424 load_perl (aTHX_ &temp);
1425
1426 coro->slot = 0;
1427 }
1428
1429 cctx_destroy (coro->cctx);
1430 SvREFCNT_dec (coro->args);
1431
1432 if (coro->next) coro->next->prev = coro->prev;
1433 if (coro->prev) coro->prev->next = coro->next;
1434 if (coro == coro_first) coro_first = coro->next;
1435
1436 return 1;
1437}
1438
1439static int
1440coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1441{
1442 struct coro *coro = (struct coro *)mg->mg_ptr;
1443 mg->mg_ptr = 0;
1444
1445 coro->hv = 0;
1446
1447 if (--coro->refcnt < 0)
1448 {
1449 coro_state_destroy (aTHX_ coro);
1450 Safefree (coro);
1451 }
1452
1453 return 0;
1454}
1455
1456static int
1457coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1458{
1459 struct coro *coro = (struct coro *)mg->mg_ptr;
1460
1461 ++coro->refcnt;
1462
1463 return 0;
1464}
1465
1466static MGVTBL coro_state_vtbl = {
1467 0, 0, 0, 0,
1468 coro_state_free,
1469 0,
1470#ifdef MGf_DUP
1471 coro_state_dup,
1472#else
1473# define MGf_DUP 0
1474#endif
1475};
1476
1477static void
1478prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1479{
1480 ta->prev = SvSTATE (prev_sv);
1481 ta->next = SvSTATE (next_sv);
1482 TRANSFER_CHECK (*ta);
1483}
1484
1485static void
1486api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1487{
1488 struct coro_transfer_args ta;
1489
1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491 TRANSFER (ta, 1);
1492}
1493
1494/** Coro ********************************************************************/
1495
1496INLINE void
1497coro_enq (pTHX_ struct coro *coro)
1498{
1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1500}
1501
1502INLINE 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 (pTHX_ SV *coro_sv)
1516{
1517 struct coro *coro;
1518 SV *sv_hook;
1519 void (*xs_hook)(void);
1520
1521 if (SvROK (coro_sv))
1522 coro_sv = SvRV (coro_sv);
1523
1524 coro = SvSTATE (coro_sv);
1525
1526 if (coro->flags & CF_READY)
1527 return 0;
1528
1529 coro->flags |= CF_READY;
1530
1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1533
1534 coro_enq (aTHX_ coro);
1535 ++coro_nready;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
552 PUSHMARK(SP); 1544 PUSHMARK (SP);
553 PUTBACK; 1545 PUTBACK;
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1546 call_sv (sv_hook, G_DISCARD);
555 croak ("FATAL: CCTXT coroutine returned!"); 1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1555
1556 return 1;
1557}
1558
1559static int
1560api_is_ready (pTHX_ SV *coro_sv)
1561{
1562 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1563}
1564
1565INLINE void
1566prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1567{
1568 SV *prev_sv, *next_sv;
1569
1570 for (;;)
1571 {
1572 next_sv = coro_deq (aTHX);
1573
1574 /* nothing to schedule: call the idle handler */
1575 if (expect_false (!next_sv))
1576 {
1577 dSP;
1578
1579 ENTER;
1580 SAVETMPS;
1581
1582 PUSHMARK (SP);
1583 PUTBACK;
1584 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1585 SPAGAIN;
1586
1587 FREETMPS;
1588 LEAVE;
1589 continue;
1590 }
1591
1592 ta->next = SvSTATE_hv (next_sv);
1593
1594 /* cannot transfer to destroyed coros, skip and look for next */
1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1596 {
1597 SvREFCNT_dec (next_sv);
1598 /* coro_nready has already been taken care of by destroy */
1599 continue;
1600 }
1601
1602 --coro_nready;
1603 break;
1604 }
1605
1606 /* free this only after the transfer */
1607 prev_sv = SvRV (coro_current);
1608 ta->prev = SvSTATE_hv (prev_sv);
1609 TRANSFER_CHECK (*ta);
1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1611 ta->next->flags &= ~CF_READY;
1612 SvRV_set (coro_current, next_sv);
1613
1614 free_coro_mortal (aTHX);
1615 coro_mortal = prev_sv;
1616}
1617
1618INLINE void
1619prepare_cede (pTHX_ struct coro_transfer_args *ta)
1620{
1621 api_ready (aTHX_ coro_current);
1622 prepare_schedule (aTHX_ ta);
1623}
1624
1625INLINE void
1626prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1627{
1628 SV *prev = SvRV (coro_current);
1629
1630 if (coro_nready)
1631 {
1632 prepare_schedule (aTHX_ ta);
1633 api_ready (aTHX_ prev);
556 } 1634 }
557 else 1635 else
1636 prepare_nop (aTHX_ ta);
1637}
1638
1639static void
1640api_schedule (pTHX)
1641{
1642 struct coro_transfer_args ta;
1643
1644 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1);
1646}
1647
1648static int
1649api_cede (pTHX)
1650{
1651 struct coro_transfer_args ta;
1652
1653 prepare_cede (aTHX_ &ta);
1654
1655 if (expect_true (ta.prev != ta.next))
1656 {
1657 TRANSFER (ta, 1);
1658 return 1;
558 { 1659 }
559 UNOP myop; 1660 else
1661 return 0;
1662}
560 1663
561 PL_op = (OP *)&myop; 1664static int
1665api_cede_notself (pTHX)
1666{
1667 if (coro_nready)
1668 {
1669 struct coro_transfer_args ta;
562 1670
563 Zero(&myop, 1, UNOP); 1671 prepare_cede_notself (aTHX_ &ta);
564 myop.op_next = Nullop; 1672 TRANSFER (ta, 1);
565 myop.op_flags = OPf_WANT_VOID; 1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
566 1678
1679static void
1680api_trace (pTHX_ SV *coro_sv, int flags)
1681{
1682 struct coro *coro = SvSTATE (coro_sv);
1683
1684 if (flags & CC_TRACE)
1685 {
1686 if (!coro->cctx)
1687 coro->cctx = cctx_new_run ();
1688 else if (!(coro->cctx->flags & CC_TRACE))
1689 croak ("cannot enable tracing on coroutine with custom stack,");
1690
1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1692 }
1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1694 {
1695 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1696
1697 if (coro->flags & CF_RUNNING)
1698 PL_runops = RUNOPS_DEFAULT;
1699 else
1700 coro->slot->runops = RUNOPS_DEFAULT;
1701 }
1702}
1703
1704/*****************************************************************************/
1705/* PerlIO::cede */
1706
1707typedef struct
1708{
1709 PerlIOBuf base;
1710 NV next, every;
1711} PerlIOCede;
1712
1713static IV
1714PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1715{
1716 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1717
1718 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1719 self->next = nvtime () + self->every;
1720
1721 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1722}
1723
1724static SV *
1725PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1726{
1727 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1728
1729 return newSVnv (self->every);
1730}
1731
1732static IV
1733PerlIOCede_flush (pTHX_ PerlIO *f)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736 double now = nvtime ();
1737
1738 if (now >= self->next)
1739 {
1740 api_cede (aTHX);
1741 self->next = now + self->every;
1742 }
1743
1744 return PerlIOBuf_flush (aTHX_ f);
1745}
1746
1747static PerlIO_funcs PerlIO_cede =
1748{
1749 sizeof(PerlIO_funcs),
1750 "cede",
1751 sizeof(PerlIOCede),
1752 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1753 PerlIOCede_pushed,
1754 PerlIOBuf_popped,
1755 PerlIOBuf_open,
1756 PerlIOBase_binmode,
1757 PerlIOCede_getarg,
1758 PerlIOBase_fileno,
1759 PerlIOBuf_dup,
1760 PerlIOBuf_read,
1761 PerlIOBuf_unread,
1762 PerlIOBuf_write,
1763 PerlIOBuf_seek,
1764 PerlIOBuf_tell,
1765 PerlIOBuf_close,
1766 PerlIOCede_flush,
1767 PerlIOBuf_fill,
1768 PerlIOBase_eof,
1769 PerlIOBase_error,
1770 PerlIOBase_clearerr,
1771 PerlIOBase_setlinebuf,
1772 PerlIOBuf_get_base,
1773 PerlIOBuf_bufsiz,
1774 PerlIOBuf_get_ptr,
1775 PerlIOBuf_get_cnt,
1776 PerlIOBuf_set_ptrcnt,
1777};
1778
1779/*****************************************************************************/
1780
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP *
1791pp_restore (pTHX)
1792{
1793 int i;
1794 SV **SP = PL_stack_base + slf_ax;
1795
567 PUSHMARK(SP); 1796 PUSHMARK (SP);
568 XPUSHs (sub_init); 1797
569 /* 1798 EXTEND (SP, slf_argc + 1);
570 * the next line is slightly wrong, as PL_op->op_next 1799
571 * is actually being executed so we skip the first op. 1800 for (i = 0; i < slf_argc; ++i)
572 * that doesn't matter, though, since it is only 1801 PUSHs (sv_2mortal (slf_argv [i]));
573 * pp_nextstate and we never return... 1802
574 * ah yes, and I don't care anyways ;) 1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806}
1807
1808static void
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
575 */ 1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
576 PUTBACK; 1909 PUTBACK;
577 PL_op = pp_entersub(); 1910 }
578 SPAGAIN;
579 1911
580 ENTER; /* necessary e.g. for dounwind */ 1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
581 } 1917 {
582} 1918 struct coro_transfer_args ta;
583 1919
584STATIC void 1920 slf_frame.prepare (aTHX_ &ta);
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 1921 TRANSFER (ta, 0);
586{ 1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
587 dSP; 1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
588 1934
589 if (prev != next) 1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
590 { 1937 {
1938 if (sp == bot)
1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
591 /* 1942 }
592 * this could be done in newprocess which would lead to 1943
593 * extremely elegant and fast (basically just SAVE/LOAD) 1944 PUTBACK;
594 * code here, but lazy allocation of stacks has also 1945 }
595 * some virtues and the overhead of the if() is nil. 1946
596 */ 1947 /* exception handling */
597 if (next->mainstack) 1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
1966
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (items > slf_arga)
1988 {
1989 slf_arga = items;
1990 free (slf_argv);
1991 slf_argv = malloc (slf_arga * sizeof (SV *));
1992 }
1993
1994 slf_argc = items;
1995
1996 for (i = 0; i < items; ++i)
1997 slf_argv [i] = SvREFCNT_inc (arg [i]);
1998
1999 PL_op->op_ppaddr = pp_slf;
2000 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2001
2002 PL_op = (OP *)&slf_restore;
2003}
2004
2005/*****************************************************************************/
2006
2007static void
2008coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2009{
2010 SV *count_sv = AvARRAY (av)[0];
2011 IV count = SvIVX (count_sv);
2012
2013 count += adjust;
2014 SvIVX (count_sv) = count;
2015
2016 /* now wake up as many waiters as are expected to lock */
2017 while (count > 0 && AvFILLp (av) > 0)
2018 {
2019 SV *cb;
2020
2021 /* swap first two elements so we can shift a waiter */
2022 AvARRAY (av)[0] = AvARRAY (av)[1];
2023 AvARRAY (av)[1] = count_sv;
2024 cb = av_shift (av);
2025
2026 if (SvOBJECT (cb))
2027 api_ready (aTHX_ cb);
2028 else
2029 croak ("callbacks not yet supported");
2030
2031 SvREFCNT_dec (cb);
2032
2033 --count;
2034 }
2035}
2036
2037static void
2038coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2039{
2040 /* call $sem->adjust (0) to possibly wake up some other waiters */
2041 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2042}
2043
2044static int
2045slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2046{
2047 AV *av = (AV *)frame->data;
2048 SV *count_sv = AvARRAY (av)[0];
2049
2050 if (SvIVX (count_sv) > 0)
2051 {
2052 SvSTATE_current->on_destroy = 0;
2053 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2054 return 0;
2055 }
2056 else
2057 {
2058 int i;
2059 /* if we were woken up but can't down, we look through the whole */
2060 /* waiters list and only add us if we aren't in there already */
2061 /* this avoids some degenerate memory usage cases */
2062
2063 for (i = 1; i <= AvFILLp (av); ++i)
2064 if (AvARRAY (av)[i] == SvRV (coro_current))
2065 return 1;
2066
2067 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2068 return 1;
2069 }
2070}
2071
2072static void
2073slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2074{
2075 AV *av = (AV *)SvRV (arg [0]);
2076
2077 if (SvIVX (AvARRAY (av)[0]) > 0)
2078 {
2079 frame->data = (void *)av;
2080 frame->prepare = prepare_nop;
2081 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2082 }
2083 else
2084 {
2085 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2086
2087 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2088 frame->prepare = prepare_schedule;
2089
2090 /* to avoid race conditions when a woken-up coro gets terminated */
2091 /* we arrange for a temporary on_destroy that calls adjust (0) */
2092 assert (!SvSTATE_current->on_destroy);//D
2093 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2094 }
2095
2096 frame->check = slf_check_semaphore_down;
2097
2098}
2099
2100/*****************************************************************************/
2101
2102#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2103
2104/* create a closure from XS, returns a code reference */
2105/* the arg can be accessed via GENSUB_ARG from the callback */
2106/* the callback must use dXSARGS/XSRETURN */
2107static SV *
2108gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2109{
2110 CV *cv = (CV *)NEWSV (0, 0);
2111
2112 sv_upgrade ((SV *)cv, SVt_PVCV);
2113
2114 CvANON_on (cv);
2115 CvISXSUB_on (cv);
2116 CvXSUB (cv) = xsub;
2117 GENSUB_ARG = arg;
2118
2119 return newRV_noinc ((SV *)cv);
2120}
2121
2122/*****************************************************************************/
2123
2124MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2125
2126PROTOTYPES: DISABLE
2127
2128BOOT:
2129{
2130#ifdef USE_ITHREADS
2131# if CORO_PTHREAD
2132 coro_thx = PERL_GET_CONTEXT;
2133# endif
2134#endif
2135 BOOT_PAGESIZE;
2136
2137 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2138 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2139
2140 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2141 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2142 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2143
2144 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2145 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2146 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2147
2148 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
2149
2150 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2151 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
2152 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2153 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
2154
2155 main_mainstack = PL_mainstack;
2156 main_top_env = PL_top_env;
2157
2158 while (main_top_env->je_prev)
2159 main_top_env = main_top_env->je_prev;
2160
598 { 2161 {
599 SAVE (prev, flags); 2162 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
600 LOAD (next);
601 2163
602 /* mark this state as in-use */ 2164 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
603 next->mainstack = 0; 2165 hv_store_ent (PL_custom_op_names, slf,
604 next->tmps_ix = -2; 2166 newSVpv ("coro_slf", 0), 0);
605 2167
606 if (flags & TRANSFER_SAVE_CCTXT) 2168 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
607 { 2169 hv_store_ent (PL_custom_op_descs, slf,
608 if (!next->ssize) 2170 newSVpv ("coro schedule like function", 0), 0);
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611 if (!prev->ssize)
612 prev->ssize = 1; /* mark cctx as valid ;) */
613
614 coro_transfer (&(prev->cctx), &(next->cctx));
615 }
616
617 } 2171 }
618 else if (next->tmps_ix == -2) 2172
619 croak ("tried to transfer to running coroutine"); 2173 coroapi.ver = CORO_API_VERSION;
620 else 2174 coroapi.rev = CORO_API_REVISION;
2175
2176 coroapi.transfer = api_transfer;
2177
2178 coroapi.sv_state = SvSTATE_;
2179 coroapi.execute_slf = api_execute_slf;
2180 coroapi.prepare_nop = prepare_nop;
2181 coroapi.prepare_schedule = prepare_schedule;
2182 coroapi.prepare_cede = prepare_cede;
2183 coroapi.prepare_cede_notself = prepare_cede_notself;
2184
621 { 2185 {
622 SAVE (prev, -1); /* first get rid of the old state */ 2186 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
623 2187
624 if (flags & TRANSFER_SAVE_CCTXT) 2188 if (!svp) croak ("Time::HiRes is required");
625 { 2189 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
626 if (!next->ssize)
627 {
628 allocate_stack (next);
629 coro_create (&(next->cctx),
630 setup_coro, (void *)next,
631 next->sptr, next->ssize);
632 }
633 2190
634 if (!prev->ssize) 2191 nvtime = INT2PTR (double (*)(), SvIV (*svp));
635 prev->ssize = 1; /* mark cctx as valid ;) */
636
637 coro_transfer (&(prev->cctx), &(next->cctx));
638 }
639 else
640 setup_coro (next);
641 } 2192 }
642 }
643}
644 2193
645MODULE = Coro::State PACKAGE = Coro::State 2194 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
646
647PROTOTYPES: ENABLE
648
649BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);
652
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660
661 main_mainstack = PL_mainstack;
662} 2195}
663 2196
664Coro::State 2197SV *
665_newprocess(args) 2198new (char *klass, ...)
666 SV * args
667 PROTOTYPE: $
668 CODE: 2199 CODE:
669 Coro__State coro; 2200{
2201 struct coro *coro;
2202 MAGIC *mg;
2203 HV *hv;
2204 int i;
670 2205
671 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
672 croak ("Coro::State::_newprocess expects an arrayref");
673
674 New (0, coro, 1, struct coro); 2206 Newz (0, coro, 1, struct coro);
2207 coro->args = newAV ();
2208 coro->flags = CF_NEW;
675 2209
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2210 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 2211 coro->next = coro_first;
678 coro->sptr = 0; 2212 coro_first = coro;
679 coro->ssize = 0;
680 2213
681 RETVAL = coro; 2214 coro->hv = hv = newHV ();
2215 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2216 mg->mg_flags |= MGf_DUP;
2217 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2218
2219 av_extend (coro->args, items - 1);
2220 for (i = 1; i < items; i++)
2221 av_push (coro->args, newSVsv (ST (i)));
2222}
682 OUTPUT: 2223 OUTPUT:
683 RETVAL 2224 RETVAL
684 2225
685void 2226void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 2227_set_stacklevel (...)
687 Coro::State_or_hashref prev 2228 CODE:
688 Coro::State_or_hashref next 2229 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
689 int flags
690 PROTOTYPE: @
691 CODE:
692 transfer (aTHX_ prev, next, flags);
693 2230
694void 2231void
695DESTROY(coro) 2232transfer (...)
696 Coro::State coro 2233 PROTOTYPE: $$
697 CODE: 2234 CODE:
2235 CORO_EXECUTE_SLF_XS (slf_init_transfer);
698 2236
699 if (coro->mainstack && coro->mainstack != main_mainstack) 2237bool
2238_destroy (SV *coro_sv)
2239 CODE:
2240 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2241 OUTPUT:
2242 RETVAL
2243
2244void
2245_exit (int code)
2246 PROTOTYPE: $
2247 CODE:
2248 _exit (code);
2249
2250int
2251cctx_stacksize (int new_stacksize = 0)
2252 PROTOTYPE: ;$
2253 CODE:
2254 RETVAL = cctx_stacksize;
2255 if (new_stacksize)
2256 {
2257 cctx_stacksize = new_stacksize;
2258 ++cctx_gen;
2259 }
2260 OUTPUT:
2261 RETVAL
2262
2263int
2264cctx_max_idle (int max_idle = 0)
2265 PROTOTYPE: ;$
2266 CODE:
2267 RETVAL = cctx_max_idle;
2268 if (max_idle > 1)
2269 cctx_max_idle = max_idle;
2270 OUTPUT:
2271 RETVAL
2272
2273int
2274cctx_count ()
2275 PROTOTYPE:
2276 CODE:
2277 RETVAL = cctx_count;
2278 OUTPUT:
2279 RETVAL
2280
2281int
2282cctx_idle ()
2283 PROTOTYPE:
2284 CODE:
2285 RETVAL = cctx_idle;
2286 OUTPUT:
2287 RETVAL
2288
2289void
2290list ()
2291 PROTOTYPE:
2292 PPCODE:
2293{
2294 struct coro *coro;
2295 for (coro = coro_first; coro; coro = coro->next)
2296 if (coro->hv)
2297 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2298}
2299
2300void
2301call (Coro::State coro, SV *coderef)
2302 ALIAS:
2303 eval = 1
2304 CODE:
2305{
2306 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
700 { 2307 {
701 struct coro temp; 2308 struct coro temp;
702 2309
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2310 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 2311 {
2312 PUTBACK;
2313 save_perl (aTHX_ &temp);
2314 load_perl (aTHX_ coro);
2315 }
705 2316
706 destroy_stacks (aTHX); 2317 {
2318 dSP;
2319 ENTER;
2320 SAVETMPS;
2321 PUTBACK;
2322 PUSHSTACK;
2323 PUSHMARK (SP);
707 2324
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2325 if (ix)
2326 eval_sv (coderef, 0);
2327 else
2328 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
709 2329
710 coro->mainstack = 0; 2330 POPSTACK;
2331 SPAGAIN;
2332 FREETMPS;
2333 LEAVE;
2334 PUTBACK;
2335 }
2336
2337 if (!(coro->flags & CF_RUNNING))
2338 {
2339 save_perl (aTHX_ coro);
2340 load_perl (aTHX_ &temp);
2341 SPAGAIN;
2342 }
711 } 2343 }
2344}
712 2345
713 if (coro->sptr) 2346SV *
2347is_ready (Coro::State coro)
2348 PROTOTYPE: $
2349 ALIAS:
2350 is_ready = CF_READY
2351 is_running = CF_RUNNING
2352 is_new = CF_NEW
2353 is_destroyed = CF_DESTROYED
2354 CODE:
2355 RETVAL = boolSV (coro->flags & ix);
2356 OUTPUT:
2357 RETVAL
2358
2359void
2360throw (Coro::State self, SV *throw = &PL_sv_undef)
2361 PROTOTYPE: $;$
2362 CODE:
2363{
2364 struct coro *current = SvSTATE_current;
2365 SV **throwp = self == current ? &coro_throw : &self->throw;
2366 SvREFCNT_dec (*throwp);
2367 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2368}
2369
2370void
2371api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2372 PROTOTYPE: $;$
2373 C_ARGS: aTHX_ coro, flags
2374
2375SV *
2376has_cctx (Coro::State coro)
2377 PROTOTYPE: $
2378 CODE:
2379 RETVAL = boolSV (!!coro->cctx);
2380 OUTPUT:
2381 RETVAL
2382
2383int
2384is_traced (Coro::State coro)
2385 PROTOTYPE: $
2386 CODE:
2387 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2388 OUTPUT:
2389 RETVAL
2390
2391UV
2392rss (Coro::State coro)
2393 PROTOTYPE: $
2394 ALIAS:
2395 usecount = 1
2396 CODE:
2397 switch (ix)
2398 {
2399 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2400 case 1: RETVAL = coro->usecount; break;
2401 }
2402 OUTPUT:
2403 RETVAL
2404
2405void
2406force_cctx ()
2407 PROTOTYPE:
2408 CODE:
2409 SvSTATE_current->cctx->idle_sp = 0;
2410
2411void
2412swap_defsv (Coro::State self)
2413 PROTOTYPE: $
2414 ALIAS:
2415 swap_defav = 1
2416 CODE:
2417 if (!self->slot)
2418 croak ("cannot swap state with coroutine that has no saved state,");
2419 else
714 { 2420 {
715 deallocate_stack (coro); 2421 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
716 coro->sptr = 0; 2422 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2423
2424 SV *tmp = *src; *src = *dst; *dst = tmp;
717 } 2425 }
718 2426
719 Safefree (coro); 2427MODULE = Coro::State PACKAGE = Coro
2428
2429BOOT:
2430{
2431 int i;
2432
2433 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2434 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2435 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2436
2437 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2438 SvREADONLY_on (coro_current);
2439
2440 coro_stash = gv_stashpv ("Coro", TRUE);
2441
2442 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2443 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2444 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2445 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2446 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2447 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2448
2449 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2450 coro_ready[i] = newAV ();
2451
2452 {
2453 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2454
2455 coroapi.schedule = api_schedule;
2456 coroapi.cede = api_cede;
2457 coroapi.cede_notself = api_cede_notself;
2458 coroapi.ready = api_ready;
2459 coroapi.is_ready = api_is_ready;
2460 coroapi.nready = coro_nready;
2461 coroapi.current = coro_current;
2462
2463 GCoroAPI = &coroapi;
2464 sv_setiv (sv, (IV)&coroapi);
2465 SvREADONLY_on (sv);
2466 }
2467}
720 2468
721void 2469void
722flush() 2470schedule (...)
723 CODE: 2471 CODE:
724#ifdef MAY_FLUSH 2472 CORO_EXECUTE_SLF_XS (slf_init_schedule);
725 flush_padlist_cache ();
726#endif
727
728MODULE = Coro::State PACKAGE = Coro::Cont
729
730# this is slightly dirty
731 2473
732void 2474void
733yield(...) 2475cede (...)
2476 CODE:
2477 CORO_EXECUTE_SLF_XS (slf_init_cede);
2478
2479void
2480cede_notself (...)
2481 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2483
2484void
2485_set_current (SV *current)
2486 PROTOTYPE: $
2487 CODE:
2488 SvREFCNT_dec (SvRV (coro_current));
2489 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2490
2491void
2492_set_readyhook (SV *hook)
734 PROTOTYPE: @ 2493 PROTOTYPE: $
735 CODE: 2494 CODE:
736 static SV *returnstk; 2495 SvREFCNT_dec (coro_readyhook);
737 SV *sv; 2496 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2497
2498int
2499prio (Coro::State coro, int newprio = 0)
2500 PROTOTYPE: $;$
2501 ALIAS:
2502 nice = 1
2503 CODE:
2504{
2505 RETVAL = coro->prio;
2506
2507 if (items > 1)
2508 {
2509 if (ix)
2510 newprio = coro->prio - newprio;
2511
2512 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2513 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2514
2515 coro->prio = newprio;
2516 }
2517}
2518 OUTPUT:
2519 RETVAL
2520
2521SV *
2522ready (SV *self)
2523 PROTOTYPE: $
2524 CODE:
2525 RETVAL = boolSV (api_ready (aTHX_ self));
2526 OUTPUT:
2527 RETVAL
2528
2529int
2530nready (...)
2531 PROTOTYPE:
2532 CODE:
2533 RETVAL = coro_nready;
2534 OUTPUT:
2535 RETVAL
2536
2537# for async_pool speedup
2538void
2539_pool_1 (SV *cb)
2540 CODE:
2541{
2542 HV *hv = (HV *)SvRV (coro_current);
2543 struct coro *coro = SvSTATE_hv ((SV *)hv);
738 AV *defav = GvAV (PL_defgv); 2544 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next; 2545 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2546 AV *invoke_av;
2547 int i, len;
740 2548
741 if (!returnstk) 2549 if (!invoke)
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2550 {
2551 SV *old = PL_diehook;
2552 PL_diehook = 0;
2553 SvREFCNT_dec (old);
2554 croak ("\3async_pool terminate\2\n");
2555 }
743 2556
744 /* set up @_ -- ugly */ 2557 SvREFCNT_dec (coro->saved_deffh);
745 av_clear (defav); 2558 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2559
2560 hv_store (hv, "desc", sizeof ("desc") - 1,
2561 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2562
2563 invoke_av = (AV *)SvRV (invoke);
2564 len = av_len (invoke_av);
2565
2566 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2567
2568 if (len > 0)
2569 {
746 av_fill (defav, items - 1); 2570 av_fill (defav, len - 1);
747 while (items--) 2571 for (i = 0; i < len; ++i)
748 av_store (defav, items, SvREFCNT_inc (ST(items))); 2572 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2573 }
2574}
749 2575
750 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2576void
751 sv = av_pop ((AV *)SvRV (returnstk)); 2577_pool_2 (SV *cb)
752 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 2578 CODE:
753 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 2579{
2580 HV *hv = (HV *)SvRV (coro_current);
2581 struct coro *coro = SvSTATE_hv ((SV *)hv);
2582
2583 sv_setsv (cb, &PL_sv_undef);
2584
2585 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2586 coro->saved_deffh = 0;
2587
2588 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2589 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2590 {
2591 SV *old = PL_diehook;
2592 PL_diehook = 0;
754 SvREFCNT_dec (sv); 2593 SvREFCNT_dec (old);
2594 croak ("\3async_pool terminate\2\n");
2595 }
755 2596
756 transfer(aTHX_ prev, next, 0); 2597 av_clear (GvAV (PL_defgv));
2598 hv_store (hv, "desc", sizeof ("desc") - 1,
2599 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
757 2600
2601 coro->prio = 0;
2602
2603 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2604 api_trace (aTHX_ coro_current, 0);
2605
2606 av_push (av_async_pool, newSVsv (coro_current));
2607}
2608
2609
2610MODULE = Coro::State PACKAGE = Coro::AIO
2611
2612void
2613_get_state (SV *self)
2614 PROTOTYPE: $
2615 PPCODE:
2616{
2617 AV *defav = GvAV (PL_defgv);
2618 AV *av = newAV ();
2619 int i;
2620 SV *data_sv = newSV (sizeof (struct io_state));
2621 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2622 SvCUR_set (data_sv, sizeof (struct io_state));
2623 SvPOK_only (data_sv);
2624
2625 data->errorno = errno;
2626 data->laststype = PL_laststype;
2627 data->laststatval = PL_laststatval;
2628 data->statcache = PL_statcache;
2629
2630 av_extend (av, AvFILLp (defav) + 1 + 1);
2631
2632 for (i = 0; i <= AvFILLp (defav); ++i)
2633 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2634
2635 av_push (av, data_sv);
2636
2637 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2638
2639 api_ready (aTHX_ self);
2640}
2641
2642void
2643_set_state (SV *state)
2644 PROTOTYPE: $
2645 PPCODE:
2646{
2647 AV *av = (AV *)SvRV (state);
2648 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2649 int i;
2650
2651 errno = data->errorno;
2652 PL_laststype = data->laststype;
2653 PL_laststatval = data->laststatval;
2654 PL_statcache = data->statcache;
2655
2656 EXTEND (SP, AvFILLp (av));
2657 for (i = 0; i < AvFILLp (av); ++i)
2658 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2659}
2660
2661
2662MODULE = Coro::State PACKAGE = Coro::AnyEvent
2663
2664BOOT:
2665 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2666
2667void
2668_schedule (...)
2669 CODE:
2670{
2671 static int incede;
2672
2673 api_cede_notself (aTHX);
2674
2675 ++incede;
2676 while (coro_nready >= incede && api_cede (aTHX))
2677 ;
2678
2679 sv_setsv (sv_activity, &PL_sv_undef);
2680 if (coro_nready >= incede)
2681 {
2682 PUSHMARK (SP);
2683 PUTBACK;
2684 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2685 SPAGAIN;
2686 }
2687
2688 --incede;
2689}
2690
2691
2692MODULE = Coro::State PACKAGE = PerlIO::cede
2693
2694BOOT:
2695 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2696
2697MODULE = Coro::State PACKAGE = Coro::Semaphore
2698
2699SV *
2700new (SV *klass, SV *count_ = 0)
2701 CODE:
2702{
2703 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2704 AV *av = newAV ();
2705 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2706 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2707}
2708 OUTPUT:
2709 RETVAL
2710
2711SV *
2712count (SV *self)
2713 CODE:
2714 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2715 OUTPUT:
2716 RETVAL
2717
2718void
2719up (SV *self, int adjust = 1)
2720 ALIAS:
2721 adjust = 1
2722 CODE:
2723 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2724
2725void
2726down (SV *self)
2727 CODE:
2728 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2729
2730void
2731try (SV *self)
2732 PPCODE:
2733{
2734 AV *av = (AV *)SvRV (self);
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 if (count > 0)
2739 {
2740 --count;
2741 SvIVX (count_sv) = count;
2742 XSRETURN_YES;
2743 }
2744 else
2745 XSRETURN_NO;
2746}
2747
2748void
2749waiters (SV *self)
2750 CODE:
2751{
2752 AV *av = (AV *)SvRV (self);
2753
2754 if (GIMME_V == G_SCALAR)
2755 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2756 else
2757 {
2758 int i;
2759 EXTEND (SP, AvFILLp (av) + 1 - 1);
2760 for (i = 1; i <= AvFILLp (av); ++i)
2761 PUSHs (newSVsv (AvARRAY (av)[i]));
2762 }
2763}
2764

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