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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.283 by root, Sun Nov 16 11:12:57 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
11 36# include <limits.h>
12#define MAY_FLUSH /* increases codesize */ 37# ifndef PAGESIZE
13 38# define PAGESIZE pagesize
14/* perl-related */ 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
15#define TRANSFER_SAVE_DEFAV 0x00000001 40static long pagesize;
16#define TRANSFER_SAVE_DEFSV 0x00000002 41# else
17#define TRANSFER_SAVE_ERRSV 0x00000004 42# define BOOT_PAGESIZE (void)0
18/* c-related */ 43# endif
19#define TRANSFER_SAVE_CCTXT 0x00000008
20#ifdef CORO_LAZY_STACK
21# define TRANSFER_LAZY_STACK 0x00000010
22#else 44#else
23# define TRANSFER_LAZY_STACK 0x00000000 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)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
24#endif 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
25 82
26#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 83/* 5.11 */
27 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
28 87
29#define SUB_INIT "Coro::State::initialize" 88/* 5.10.0 */
30#define UCORO_STATE "_coro_state" 89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
31 92
32/* The next macro should delcare a variable stacklevel that contains and approximation 93/* 5.8.8 */
33 * to the current C stack pointer. It's property is that it changes with each call 94#ifndef GV_NOTQUAL
34 * and should be unique. */ 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
35#define dSTACKLEVEL void *stacklevel = &stacklevel 124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
36 126
37#define labs(l) ((l) >= 0 ? (l) : -(l)) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
38 128
39/* this is actually not only the c stack but also c registers etc... */ 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 */
40typedef struct { 199typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 200{
42 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 202
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;
45 coro_context cctx; 211 coro_context cctx;
46 212
47 void *sptr; 213 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
49} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
50 219
51static coro_stack main_stack = { 1, 0, 0 }; 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};
52 226
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 */
53struct coro { 242struct coro {
54 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
55 coro_stack *stack; 244 coro_cctx *cctx;
56 void *cursp;
57 int gencnt;
58 245
59 /* optionally saved, might be zero */ 246 /* process data */
60 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
61 SV *defsv;
62 SV *errsv;
63
64 /* saved global state not related to stacks */
65 U8 dowarn;
66
67 /* the stacks and related info (callchain etc..) */
68 PERL_SI *curstackinfo;
69 AV *curstack;
70 AV *mainstack; 248 AV *mainstack;
71 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV start_env;
94 JMPENV *top_env;
95 250
96 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
97 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;
98}; 269};
99 270
100typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
101typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
102 273
103static AV *main_mainstack; /* used to differentiate between $main and others */ 274static struct CoroSLF slf_frame; /* the current slf frame */
104static HV *coro_state_stash;
105static SV *ucoro_state_sv;
106static U32 ucoro_state_hash;
107static HV *padlist_cache;
108 275
109/* mostly copied from op.c:cv_clone2 */ 276/** Coro ********************************************************************/
110STATIC AV * 277
111clone_padlist (AV *protopadlist) 278#define PRIO_MAX 3
279#define PRIO_HIGH 1
280#define PRIO_NORMAL 0
281#define PRIO_LOW -1
282#define PRIO_IDLE -3
283#define PRIO_MIN -4
284
285/* for Coro.pm */
286static SV *coro_current;
287static SV *coro_readyhook;
288static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
289static struct coro *coro_first;
290#define coro_nready coroapi.nready
291
292/** lowlevel stuff **********************************************************/
293
294static SV *
295coro_get_sv (pTHX_ const char *name, int create)
112{ 296{
113 AV *av; 297#if PERL_VERSION_ATLEAST (5,10,0)
114 I32 ix; 298 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 299 get_sv (name, create);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 300#endif
117 SV **pname = AvARRAY (protopad_name); 301 return get_sv (name, create);
118 SV **ppad = AvARRAY (protopad); 302}
119 I32 fname = AvFILLp (protopad_name); 303
120 I32 fpad = AvFILLp (protopad); 304static AV *
305coro_get_av (pTHX_ const char *name, int create)
306{
307#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_av (name, create);
310#endif
311 return get_av (name, create);
312}
313
314static HV *
315coro_get_hv (pTHX_ const char *name, int create)
316{
317#if PERL_VERSION_ATLEAST (5,10,0)
318 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
319 get_hv (name, create);
320#endif
321 return get_hv (name, create);
322}
323
324static AV *
325coro_clone_padlist (pTHX_ CV *cv)
326{
327 AV *padlist = CvPADLIST (cv);
121 AV *newpadlist, *newpad_name, *newpad; 328 AV *newpadlist, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 329
132 newpadlist = newAV (); 330 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 331 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 332#if PERL_VERSION_ATLEAST (5,10,0)
333 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
334#else
335 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
336#endif
337 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
338 --AvFILLp (padlist);
339
340 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
135 av_store (newpadlist, 1, (SV *) newpad); 341 av_store (newpadlist, 1, (SV *)newpad);
136 342
137 av = newAV (); /* will be @_ */ 343 return newpadlist;
138 av_extend (av, 0); 344}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 345
142 for (ix = fpad; ix > 0; ix--) 346static void
347free_padlist (pTHX_ AV *padlist)
348{
349 /* may be during global destruction */
350 if (SvREFCNT (padlist))
143 { 351 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 352 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 353 while (i >= 0)
146 { 354 {
147 char *name = SvPVX (namesv); /* XXX */ 355 SV **svp = av_fetch (padlist, i--, FALSE);
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 356 if (svp)
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 357 {
152 else
153 { /* our own lexical */
154 SV *sv; 358 SV *sv;
155 if (*name == '&') 359 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156 sv = SvREFCNT_inc (ppad[ix]); 360 SvREFCNT_dec (sv);
157 else if (*name == '@') 361
158 sv = (SV *) newAV (); 362 SvREFCNT_dec (*svp);
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 } 363 }
167 } 364 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179 365
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC AV *
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist); 366 SvREFCNT_dec ((SV*)padlist);
220 } 367 }
221} 368}
222#endif 369
370static int
371coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
372{
373 AV *padlist;
374 AV *av = (AV *)mg->mg_obj;
375
376 /* casting is fun. */
377 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
378 free_padlist (aTHX_ padlist);
379
380 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
381
382 return 0;
383}
384
385#define CORO_MAGIC_type_cv PERL_MAGIC_ext
386#define CORO_MAGIC_type_state PERL_MAGIC_ext
387
388static MGVTBL coro_cv_vtbl = {
389 0, 0, 0, 0,
390 coro_cv_free
391};
392
393#define CORO_MAGIC(sv, type) \
394 expect_true (SvMAGIC (sv)) \
395 ? expect_true (SvMAGIC (sv)->mg_type == type) \
396 ? SvMAGIC (sv) \
397 : mg_find (sv, type) \
398 : 0
399
400#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
401#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
402
403INLINE struct coro *
404SvSTATE_ (pTHX_ SV *coro)
405{
406 HV *stash;
407 MAGIC *mg;
408
409 if (SvROK (coro))
410 coro = SvRV (coro);
411
412 if (expect_false (SvTYPE (coro) != SVt_PVHV))
413 croak ("Coro::State object required");
414
415 stash = SvSTASH (coro);
416 if (expect_false (stash != coro_stash && stash != coro_state_stash))
417 {
418 /* very slow, but rare, check */
419 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
420 croak ("Coro::State object required");
421 }
422
423 mg = CORO_MAGIC_state (coro);
424 return (struct coro *)mg->mg_ptr;
425}
426
427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* fastert than SvSTATE, but expects a coroutine hv */
430INLINE struct coro *
431SvSTATE_hv (SV *sv)
432{
433 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
434 ? SvMAGIC (sv)
435 : mg_find (sv, CORO_MAGIC_type_state);
436
437 return (struct coro *)mg->mg_ptr;
438}
439
440#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
223 441
224/* the next two functions merely cache the padlists */ 442/* the next two functions merely cache the padlists */
225STATIC void 443static void
226get_padlist (CV *cv) 444get_padlist (pTHX_ CV *cv)
227{ 445{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 446 MAGIC *mg = CORO_MAGIC_cv (cv);
447 AV *av;
229 448
230 if (he && AvFILLp ((AV *)*he) >= 0) 449 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 450 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232 else 451 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 { 452 {
453#if CORO_PREFER_PERL_FUNCTIONS
454 /* this is probably cleaner? but also slower! */
455 /* in practise, it seems to be less stable */
456 CV *cp = Perl_cv_clone (cv);
457 CvPADLIST (cv) = CvPADLIST (cp);
458 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (*he); 459 SvREFCNT_dec (cp);
244 *he = (SV *)newAV (); 460#else
461 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
462#endif
245 } 463 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248} 464}
249 465
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
280#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void 466static void
467put_padlist (pTHX_ CV *cv)
468{
469 MAGIC *mg = CORO_MAGIC_cv (cv);
470 AV *av;
471
472 if (expect_false (!mg))
473 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
474
475 av = (AV *)mg->mg_obj;
476
477 if (expect_false (AvFILLp (av) >= AvMAX (av)))
478 av_extend (av, AvMAX (av) + 1);
479
480 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
481}
482
483/** load & save, init *******************************************************/
484
485static void
285load_state(pTHX_ Coro__State c) 486load_perl (pTHX_ Coro__State c)
286{ 487{
287 PL_dowarn = c->dowarn; 488 perl_slots *slot = c->slot;
489 c->slot = 0;
288 490
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 491 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_start_env = c->start_env;
315 PL_top_env = c->top_env;
316 492
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 493 GvSV (PL_defgv) = slot->defsv;
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 494 GvAV (PL_defgv) = slot->defav;
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 495 GvSV (PL_errgv) = slot->errsv;
496 GvSV (irsgv) = slot->irsgv;
497
498 #define VAR(name,type) PL_ ## name = slot->name;
499 # include "state.h"
500 #undef VAR
320 501
321 { 502 {
322 dSP; 503 dSP;
504
323 CV *cv; 505 CV *cv;
324 506
325 /* now do the ugly restore mess */ 507 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 508 while (expect_true (cv = (CV *)POPs))
327 { 509 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 510 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 511 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 512 CvPADLIST (cv) = (AV *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 513 }
341 514
342 PUTBACK; 515 PUTBACK;
343 } 516 }
344}
345 517
518 slf_frame = c->slf_frame;
519}
520
346static void 521static void
347save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
348{ 523{
524 c->slf_frame = slf_frame;
525
349 { 526 {
350 dSP; 527 dSP;
351 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 532 /*
356 * the worst thing you can imagine happens first - we have to save 533 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
358 */ 535 */
359 536
360 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
362 for (;;) 539 for (;;)
363 { 540 {
364 do 541 while (expect_true (cxix >= 0))
365 { 542 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
367 544
368 if (CxTYPE(cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
369 { 546 {
370 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
548
371 if (CvDEPTH(cv)) 549 if (expect_true (CvDEPTH (cv)))
372 { 550 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 551 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
389 555
390 get_padlist (cv); /* this is a monster */ 556 CvDEPTH (cv) = 0;
557 get_padlist (aTHX_ cv);
391 } 558 }
392 } 559 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 560 }
400 while (cxix >= 0);
401 561
402 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
403 break; 563 break;
404 564
405 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
408 } 568 }
409 569
410 PUTBACK; 570 PUTBACK;
411 } 571 }
412 572
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 584
417 /* I have not the slightest idea of why av_reify is necessary */
418 /* but if it's missing the defav contents magically get replaced sometimes */
419 if (c->defav)
420 av_reify (c->defav);
421
422 c->dowarn = PL_dowarn;
423
424 c->curstackinfo = PL_curstackinfo;
425 c->curstack = PL_curstack;
426 c->mainstack = PL_mainstack; 585 c->mainstack = PL_mainstack;
427 c->stack_sp = PL_stack_sp; 586
428 c->op = PL_op; 587 {
429 c->curpad = PL_curpad; 588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
430 c->stack_base = PL_stack_base; 589
431 c->stack_max = PL_stack_max; 590 slot->defav = GvAV (PL_defgv);
432 c->tmps_stack = PL_tmps_stack; 591 slot->defsv = DEFSV;
433 c->tmps_floor = PL_tmps_floor; 592 slot->errsv = ERRSV;
434 c->tmps_ix = PL_tmps_ix; 593 slot->irsgv = GvSV (irsgv);
435 c->tmps_max = PL_tmps_max; 594
436 c->markstack = PL_markstack; 595 #define VAR(name,type) slot->name = PL_ ## name;
437 c->markstack_ptr = PL_markstack_ptr; 596 # include "state.h"
438 c->markstack_max = PL_markstack_max; 597 #undef VAR
439 c->scopestack = PL_scopestack; 598 }
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->start_env = PL_start_env;
450 c->top_env = PL_top_env;
451} 599}
452 600
453/* 601/*
454 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
455 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
456 * on the assumption that coroutines do not usually need 604 * on the (sometimes correct) assumption that coroutines do
457 * a lot of stackspace. 605 * not usually need a lot of stackspace.
458 */ 606 */
459STATIC void 607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks init_stacks
609#else
610static void
460coro_init_stacks (pTHX) 611coro_init_stacks (pTHX)
461{ 612{
462 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 613 PL_curstackinfo = new_stackinfo(32, 8);
463 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
464 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
465 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466 617
467 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
468 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
469 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470 621
471 New(50,PL_tmps_stack,96,SV*); 622 New(50,PL_tmps_stack,32,SV*);
472 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
473 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
474 PL_tmps_max = 96; 625 PL_tmps_max = 32;
475 626
476 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
477 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
478 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
479 630
631#ifdef SET_MARK_OFFSET
480 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
633#endif
481 634
482 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
485 638
486 New(54,PL_savestack,96,ANY); 639 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
488 PL_savestack_max = 96; 641 PL_savestack_max = 24;
489 642
643#if !PERL_VERSION_ATLEAST (5,10,0)
490 New(54,PL_retstack,8,OP*); 644 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
492 PL_retstack_max = 8; 646 PL_retstack_max = 4;
647#endif
493} 648}
649#endif
494 650
495/* 651/*
496 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
497 * still there is a memleak of 128 bytes...
498 */ 653 */
499STATIC void 654static void
500destroy_stacks(pTHX) 655coro_destruct_stacks (pTHX)
501{ 656{
502 /* is this ugly, I ask? */
503 while (PL_scopestack_ix)
504 LEAVE;
505
506 /* sure it is, but more important: is it correct?? :/ */
507 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508 FREETMPS;
509
510 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
512 659
513 while (PL_curstackinfo) 660 while (PL_curstackinfo)
514 { 661 {
515 PERL_SI *p = PL_curstackinfo->si_prev; 662 PERL_SI *p = PL_curstackinfo->si_prev;
516 663
517 { 664 if (!IN_DESTRUCT)
518 dSP;
519 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520 PUTBACK; /* possibly superfluous */
521 }
522
523 dounwind(-1);
524
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 665 SvREFCNT_dec (PL_curstackinfo->si_stack);
666
526 Safefree(PL_curstackinfo->si_cxstack); 667 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 668 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 669 PL_curstackinfo = p;
529 } 670 }
530 671
531 Safefree(PL_tmps_stack); 672 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 673 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 674 Safefree (PL_scopestack);
534 Safefree(PL_savestack); 675 Safefree (PL_savestack);
676#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree(PL_retstack); 677 Safefree (PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#ifdef HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif 678#endif
679}
680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
555 { 692 {
556 /*FIXME*//*D*//* reasonable stack size! */ 693 slot = &tmp_slot;
557 stack->ssize = -4096 * sizeof (long); 694
558 New (0, stack->sptr, 4096, long); 695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
559 } 698 }
560 }
561 else 699 else
562 stack->sptr = 0; 700 slot = coro->slot;
563 701
564 ctx->stack = stack; 702 if (slot)
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 { 703 {
578#ifdef HAVE_MMAP 704 rss += sizeof (slot->curstackinfo);
579 if (stack->ssize > 0 && stack->sptr) 705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
580 munmap (stack->sptr, stack->ssize); 706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
581 else 707 rss += slot->tmps_max * sizeof (SV *);
582#else 708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
583 Safefree (stack->sptr); 709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
584#endif 714#endif
585 Safefree (stack);
586 } 715 }
587 else if (ctx->gencnt == stack->gencnt) 716 }
588 --stack->usecnt; 717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
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 == '_')
589 } 749 {
590} 750 SV **svp = 0;
591 751
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
592static void 765static int
593setup_coro (void *arg) 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;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static void
827coro_setup (pTHX_ struct coro *coro)
594{ 828{
595 /* 829 /*
596 * emulate part of the perl startup here. 830 * emulate part of the perl startup here.
597 */ 831 */
598 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601
602 coro_init_stacks (aTHX); 832 coro_init_stacks (aTHX);
603 JMPENV_BOOTSTRAP; 833
834 PL_runops = RUNOPS_DEFAULT;
835 PL_curcop = &PL_compiling;
836 PL_in_eval = EVAL_NULL;
837 PL_comppad = 0;
838 PL_curpm = 0;
839 PL_curpad = 0;
840 PL_localizing = 0;
841 PL_dirty = 0;
842 PL_restartop = 0;
843#if PERL_VERSION_ATLEAST (5,10,0)
844 PL_parser = 0;
845#endif
846
847 /* recreate the die/warn hooks */
848 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
849 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
850
851 GvSV (PL_defgv) = newSV (0);
852 GvAV (PL_defgv) = coro->args; coro->args = 0;
853 GvSV (PL_errgv) = newSV (0);
854 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
855 PL_rs = newSVsv (GvSV (irsgv));
856 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
857
858 {
859 dSP;
860 UNOP myop;
861
862 Zero (&myop, 1, UNOP);
863 myop.op_next = Nullop;
864 myop.op_flags = OPf_WANT_VOID;
865
866 PUSHMARK (SP);
867 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
868 PUTBACK;
869 PL_op = (OP *)&myop;
870 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
604 SPAGAIN; 871 SPAGAIN;
872 }
605 873
606 /*PL_curcop = 0;*/ 874 /* this newly created coroutine might be run on an existing cctx which most
875 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
876 */
877 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
878 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
879}
880
881static void
882coro_destruct (pTHX_ struct coro *coro)
883{
884 if (!IN_DESTRUCT)
885 {
886 /* restore all saved variables and stuff */
887 LEAVE_SCOPE (0);
888 assert (PL_tmps_floor == -1);
889
890 /* free all temporaries */
891 FREETMPS;
892 assert (PL_tmps_ix == -1);
893
894 /* unwind all extra stacks */
895 POPSTACK_TO (PL_mainstack);
896
897 /* unwind main stack */
898 dounwind (-1);
899 }
900
901 SvREFCNT_dec (GvSV (PL_defgv));
607 SvREFCNT_dec (GvAV (PL_defgv)); 902 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args; 903 SvREFCNT_dec (GvSV (PL_errgv));
904 SvREFCNT_dec (PL_defoutgv);
905 SvREFCNT_dec (PL_rs);
906 SvREFCNT_dec (GvSV (irsgv));
609 907
610 if (ctx->stack) 908 SvREFCNT_dec (PL_diehook);
611 { 909 SvREFCNT_dec (PL_warnhook);
612 ctx->cursp = 0; 910
911 SvREFCNT_dec (coro->saved_deffh);
912 SvREFCNT_dec (coro->throw);
613 913
614 PUSHMARK(SP); 914 coro_destruct_stacks (aTHX);
615 PUTBACK; 915}
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 916
617 croak ("FATAL: CCTXT coroutine returned!"); 917INLINE void
918free_coro_mortal (pTHX)
919{
920 if (expect_true (coro_mortal))
618 } 921 {
619 else 922 SvREFCNT_dec (coro_mortal);
923 coro_mortal = 0;
620 { 924 }
621 UNOP myop; 925}
622 926
623 PL_op = (OP *)&myop; 927static int
928runops_trace (pTHX)
929{
930 COP *oldcop = 0;
931 int oldcxix = -2;
932 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
933 coro_cctx *cctx = coro->cctx;
624 934
625 Zero(&myop, 1, UNOP); 935 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 } 936 {
644} 937 PERL_ASYNC_CHECK ();
645 938
646static void 939 if (cctx->flags & CC_TRACE_ALL)
647continue_coro (void *arg)
648{
649 /*
650 * this is a _very_ stripped down perl interpreter ;)
651 */
652 Coro__State ctx = (Coro__State)arg;
653
654 ctx->cursp = 0;
655 PL_op = PL_op->op_next;
656 CALLRUNOPS(aTHX);
657 /*NORETURN*/
658 abort ();
659}
660
661STATIC void
662transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
663{
664 dSP;
665 dSTACKLEVEL;
666
667 if (prev != next)
668 {
669 if (next->mainstack)
670 { 940 {
671 SAVE (prev, flags); 941 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
672 LOAD (next);
673
674 /* mark this state as in-use */
675 next->mainstack = 0;
676 next->tmps_ix = -2;
677
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 { 942 {
681 if (!prev->stack) 943 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
682 allocate_stack (prev, 0); 944 SV **bot, **top;
683 else if (prev->cursp != stacklevel 945 AV *av = newAV (); /* return values */
684 && prev->stack->usecnt > 1) 946 SV **cb;
947 dSP;
948
949 GV *gv = CvGV (cx->blk_sub.cv);
950 SV *fullname = sv_2mortal (newSV (0));
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 bot = PL_stack_base + cx->blk_oldsp + 1;
955 top = cx->blk_gimme == G_ARRAY ? SP + 1
956 : cx->blk_gimme == G_SCALAR ? bot + 1
957 : bot;
958
959 av_extend (av, top - bot);
960 while (bot < top)
961 av_push (av, SvREFCNT_inc_NN (*bot++));
962
963 PL_runops = RUNOPS_DEFAULT;
964 ENTER;
965 SAVETMPS;
966 EXTEND (SP, 3);
967 PUSHMARK (SP);
968 PUSHs (&PL_sv_no);
969 PUSHs (fullname);
970 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
971 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN;
975 FREETMPS;
976 LEAVE;
977 PL_runops = runops_trace;
978 }
979
980 if (oldcop != PL_curcop)
981 {
982 oldcop = PL_curcop;
983
984 if (PL_curcop != &PL_compiling)
685 { 985 {
686 prev->gencnt = ++prev->stack->gencnt; 986 SV **cb;
687 prev->stack->usecnt = 1;
688 }
689 987
690 /* has our stack been invalidated? */ 988 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
691 if (next->stack && next->stack->gencnt != next->gencnt)
692 { 989 {
693 deallocate_stack (next); 990 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
694 allocate_stack (next, 1); 991
695 coro_create (&(next->stack->cctx), 992 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
696 continue_coro, (void *)next, 993 {
697 next->stack->sptr, labs (next->stack->ssize)); 994 runops_proc_t old_runops = PL_runops;
995 dSP;
996 GV *gv = CvGV (cx->blk_sub.cv);
997 SV *fullname = sv_2mortal (newSV (0));
998
999 if (isGV (gv))
1000 gv_efullname3 (fullname, gv, 0);
1001
1002 PL_runops = RUNOPS_DEFAULT;
1003 ENTER;
1004 SAVETMPS;
1005 EXTEND (SP, 3);
1006 PUSHMARK (SP);
1007 PUSHs (&PL_sv_yes);
1008 PUSHs (fullname);
1009 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1010 PUTBACK;
1011 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1012 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1013 SPAGAIN;
1014 FREETMPS;
1015 LEAVE;
1016 PL_runops = runops_trace;
1017 }
1018
1019 oldcxix = cxstack_ix;
698 } 1020 }
699 1021
700 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1022 if (cctx->flags & CC_TRACE_LINE)
701 }
702
703 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else
707 {
708 SAVE (prev, -1); /* first get rid of the old state */
709
710 if (flags & TRANSFER_SAVE_CCTXT)
711 {
712 if (!prev->stack)
713 allocate_stack (prev, 0);
714
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 { 1023 {
717 setup_coro (next); 1024 dSP;
718 1025
719 prev->stack->refcnt++; 1026 PL_runops = RUNOPS_DEFAULT;
720 prev->stack->usecnt++; 1027 ENTER;
721 next->stack = prev->stack; 1028 SAVETMPS;
722 next->gencnt = prev->gencnt; 1029 EXTEND (SP, 3);
1030 PL_runops = RUNOPS_DEFAULT;
1031 PUSHMARK (SP);
1032 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1033 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1034 PUTBACK;
1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1037 SPAGAIN;
1038 FREETMPS;
1039 LEAVE;
1040 PL_runops = runops_trace;
723 } 1041 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 } 1042 }
732 } 1043 }
733 else
734 setup_coro (next);
735 } 1044 }
736 } 1045 }
737 1046
738 next->cursp = stacklevel; 1047 TAINT_NOT;
1048 return 0;
739} 1049}
740 1050
1051static void
1052prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1053{
1054 ta->prev = (struct coro *)cctx;
1055 ta->next = 0;
1056}
1057
1058/* inject a fake call to Coro::State::_cctx_init into the execution */
1059/* _cctx_init should be careful, as it could be called at almost any time */
1060/* during execution of a perl program */
1061/* also initialises PL_top_env */
1062static void NOINLINE
1063cctx_prepare (pTHX_ coro_cctx *cctx)
1064{
1065 dSP;
1066 UNOP myop;
1067
1068 PL_top_env = &PL_start_env;
1069
1070 if (cctx->flags & CC_TRACE)
1071 PL_runops = runops_trace;
1072
1073 Zero (&myop, 1, UNOP);
1074 myop.op_next = PL_op;
1075 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1076
1077 PUSHMARK (SP);
1078 EXTEND (SP, 2);
1079 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1080 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1081 PUTBACK;
1082 PL_op = (OP *)&myop;
1083 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1084 SPAGAIN;
1085}
1086
1087/* the tail of transfer: execute stuff we can only do after a transfer */
1088INLINE void
1089transfer_tail (pTHX)
1090{
1091 free_coro_mortal (aTHX);
1092}
1093
1094/*
1095 * this is a _very_ stripped down perl interpreter ;)
1096 */
1097static void
1098cctx_run (void *arg)
1099{
1100#ifdef USE_ITHREADS
1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1106 dTHX;
1107
1108 /* normally we would need to skip the entersub here */
1109 /* not doing so will re-execute it, which is exactly what we want */
1110 /* PL_nop = PL_nop->op_next */
1111
1112 /* inject a fake subroutine call to cctx_init */
1113 cctx_prepare (aTHX_ (coro_cctx *)arg);
1114
1115 /* cctx_run is the alternative tail of transfer() */
1116 transfer_tail (aTHX);
1117
1118 /* somebody or something will hit me for both perl_run and PL_restartop */
1119 PL_restartop = PL_op;
1120 perl_run (PL_curinterp);
1121
1122 /*
1123 * If perl-run returns we assume exit() was being called or the coro
1124 * fell off the end, which seems to be the only valid (non-bug)
1125 * reason for perl_run to return. We try to exit by jumping to the
1126 * bootstrap-time "top" top_env, as we cannot restore the "main"
1127 * coroutine as Coro has no such concept
1128 */
1129 PL_top_env = main_top_env;
1130 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1131 }
1132}
1133
1134static coro_cctx *
1135cctx_new ()
1136{
1137 coro_cctx *cctx;
1138
1139 ++cctx_count;
1140 New (0, cctx, 1, coro_cctx);
1141
1142 cctx->gen = cctx_gen;
1143 cctx->flags = 0;
1144 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1145
1146 return cctx;
1147}
1148
1149/* create a new cctx only suitable as source */
1150static coro_cctx *
1151cctx_new_empty ()
1152{
1153 coro_cctx *cctx = cctx_new ();
1154
1155 cctx->sptr = 0;
1156 coro_create (&cctx->cctx, 0, 0, 0, 0);
1157
1158 return cctx;
1159}
1160
1161/* create a new cctx suitable as destination/running a perl interpreter */
1162static coro_cctx *
1163cctx_new_run ()
1164{
1165 coro_cctx *cctx = cctx_new ();
1166 void *stack_start;
1167 size_t stack_size;
1168
1169#if HAVE_MMAP
1170 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1171 /* mmap supposedly does allocate-on-write for us */
1172 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1173
1174 if (cctx->sptr != (void *)-1)
1175 {
1176 #if CORO_STACKGUARD
1177 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1178 #endif
1179 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1180 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1181 cctx->flags |= CC_MAPPED;
1182 }
1183 else
1184#endif
1185 {
1186 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1187 New (0, cctx->sptr, cctx_stacksize, long);
1188
1189 if (!cctx->sptr)
1190 {
1191 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1192 _exit (EXIT_FAILURE);
1193 }
1194
1195 stack_start = cctx->sptr;
1196 stack_size = cctx->ssize;
1197 }
1198
1199 #if CORO_USE_VALGRIND
1200 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1201 #endif
1202
1203 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1204
1205 return cctx;
1206}
1207
1208static void
1209cctx_destroy (coro_cctx *cctx)
1210{
1211 if (!cctx)
1212 return;
1213
1214 --cctx_count;
1215 coro_destroy (&cctx->cctx);
1216
1217 /* coro_transfer creates new, empty cctx's */
1218 if (cctx->sptr)
1219 {
1220 #if CORO_USE_VALGRIND
1221 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1222 #endif
1223
1224#if HAVE_MMAP
1225 if (cctx->flags & CC_MAPPED)
1226 munmap (cctx->sptr, cctx->ssize);
1227 else
1228#endif
1229 Safefree (cctx->sptr);
1230 }
1231
1232 Safefree (cctx);
1233}
1234
1235/* wether this cctx should be destructed */
1236#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1237
1238static coro_cctx *
1239cctx_get (pTHX)
1240{
1241 while (expect_true (cctx_first))
1242 {
1243 coro_cctx *cctx = cctx_first;
1244 cctx_first = cctx->next;
1245 --cctx_idle;
1246
1247 if (expect_true (!CCTX_EXPIRED (cctx)))
1248 return cctx;
1249
1250 cctx_destroy (cctx);
1251 }
1252
1253 return cctx_new_run ();
1254}
1255
1256static void
1257cctx_put (coro_cctx *cctx)
1258{
1259 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1260
1261 /* free another cctx if overlimit */
1262 if (expect_false (cctx_idle >= cctx_max_idle))
1263 {
1264 coro_cctx *first = cctx_first;
1265 cctx_first = first->next;
1266 --cctx_idle;
1267
1268 cctx_destroy (first);
1269 }
1270
1271 ++cctx_idle;
1272 cctx->next = cctx_first;
1273 cctx_first = cctx;
1274}
1275
1276/** coroutine switching *****************************************************/
1277
1278static void
1279transfer_check (pTHX_ struct coro *prev, struct coro *next)
1280{
1281 if (expect_true (prev != next))
1282 {
1283 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1284 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1285
1286 if (expect_false (next->flags & CF_RUNNING))
1287 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1288
1289 if (expect_false (next->flags & CF_DESTROYED))
1290 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1291
1292#if !PERL_VERSION_ATLEAST (5,10,0)
1293 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1294 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1295#endif
1296 }
1297}
1298
1299/* always use the TRANSFER macro */
1300static void NOINLINE
1301transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1302{
1303 dSTACKLEVEL;
1304
1305 /* sometimes transfer is only called to set idle_sp */
1306 if (expect_false (!next))
1307 {
1308 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1309 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1310 }
1311 else if (expect_true (prev != next))
1312 {
1313 coro_cctx *prev__cctx;
1314
1315 if (expect_false (prev->flags & CF_NEW))
1316 {
1317 /* create a new empty/source context */
1318 prev->cctx = cctx_new_empty ();
1319 prev->flags &= ~CF_NEW;
1320 prev->flags |= CF_RUNNING;
1321 }
1322
1323 prev->flags &= ~CF_RUNNING;
1324 next->flags |= CF_RUNNING;
1325
1326 /* first get rid of the old state */
1327 save_perl (aTHX_ prev);
1328
1329 if (expect_false (next->flags & CF_NEW))
1330 {
1331 /* need to start coroutine */
1332 next->flags &= ~CF_NEW;
1333 /* setup coroutine call */
1334 coro_setup (aTHX_ next);
1335 }
1336 else
1337 load_perl (aTHX_ next);
1338
1339 prev__cctx = prev->cctx;
1340
1341 /* possibly untie and reuse the cctx */
1342 if (expect_true (
1343 prev__cctx->idle_sp == (void *)stacklevel
1344 && !(prev__cctx->flags & CC_TRACE)
1345 && !force_cctx
1346 ))
1347 {
1348 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1349 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1350
1351 prev->cctx = 0;
1352
1353 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1354 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1355 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1356 if (!next->cctx)
1357 next->cctx = cctx_get (aTHX);
1358
1359 cctx_put (prev__cctx);
1360 }
1361
1362 ++next->usecount;
1363
1364 if (expect_true (!next->cctx))
1365 next->cctx = cctx_get (aTHX);
1366
1367 if (expect_false (prev__cctx != next->cctx))
1368 {
1369 prev__cctx->top_env = PL_top_env;
1370 PL_top_env = next->cctx->top_env;
1371 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1372 }
1373
1374 transfer_tail (aTHX);
1375 }
1376}
1377
1378#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1379#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1380
1381/** high level stuff ********************************************************/
1382
1383static int
1384coro_state_destroy (pTHX_ struct coro *coro)
1385{
1386 if (coro->flags & CF_DESTROYED)
1387 return 0;
1388
1389 if (coro->on_destroy)
1390 coro->on_destroy (aTHX_ coro);
1391
1392 coro->flags |= CF_DESTROYED;
1393
1394 if (coro->flags & CF_READY)
1395 {
1396 /* reduce nready, as destroying a ready coro effectively unreadies it */
1397 /* alternative: look through all ready queues and remove the coro */
1398 --coro_nready;
1399 }
1400 else
1401 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1402
1403 if (coro->mainstack && coro->mainstack != main_mainstack)
1404 {
1405 struct coro temp;
1406
1407 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1408
1409 save_perl (aTHX_ &temp);
1410 load_perl (aTHX_ coro);
1411
1412 coro_destruct (aTHX_ coro);
1413
1414 load_perl (aTHX_ &temp);
1415
1416 coro->slot = 0;
1417 }
1418
1419 cctx_destroy (coro->cctx);
1420 SvREFCNT_dec (coro->args);
1421
1422 if (coro->next) coro->next->prev = coro->prev;
1423 if (coro->prev) coro->prev->next = coro->next;
1424 if (coro == coro_first) coro_first = coro->next;
1425
1426 return 1;
1427}
1428
1429static int
1430coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1431{
1432 struct coro *coro = (struct coro *)mg->mg_ptr;
1433 mg->mg_ptr = 0;
1434
1435 coro->hv = 0;
1436
1437 if (--coro->refcnt < 0)
1438 {
1439 coro_state_destroy (aTHX_ coro);
1440 Safefree (coro);
1441 }
1442
1443 return 0;
1444}
1445
1446static int
1447coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1448{
1449 struct coro *coro = (struct coro *)mg->mg_ptr;
1450
1451 ++coro->refcnt;
1452
1453 return 0;
1454}
1455
1456static MGVTBL coro_state_vtbl = {
1457 0, 0, 0, 0,
1458 coro_state_free,
1459 0,
1460#ifdef MGf_DUP
1461 coro_state_dup,
1462#else
1463# define MGf_DUP 0
1464#endif
1465};
1466
1467static void
1468prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1469{
1470 ta->prev = SvSTATE (prev_sv);
1471 ta->next = SvSTATE (next_sv);
1472 TRANSFER_CHECK (*ta);
1473}
1474
1475static void
1476api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1477{
1478 struct coro_transfer_args ta;
1479
1480 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1481 TRANSFER (ta, 1);
1482}
1483
1484/** Coro ********************************************************************/
1485
1486INLINE void
1487coro_enq (pTHX_ struct coro *coro)
1488{
1489 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1490}
1491
1492INLINE SV *
1493coro_deq (pTHX)
1494{
1495 int prio;
1496
1497 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1498 if (AvFILLp (coro_ready [prio]) >= 0)
1499 return av_shift (coro_ready [prio]);
1500
1501 return 0;
1502}
1503
1504static int
1505api_ready (pTHX_ SV *coro_sv)
1506{
1507 struct coro *coro;
1508 SV *sv_hook;
1509 void (*xs_hook)(void);
1510
1511 if (SvROK (coro_sv))
1512 coro_sv = SvRV (coro_sv);
1513
1514 coro = SvSTATE (coro_sv);
1515
1516 if (coro->flags & CF_READY)
1517 return 0;
1518
1519 coro->flags |= CF_READY;
1520
1521 sv_hook = coro_nready ? 0 : coro_readyhook;
1522 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1523
1524 coro_enq (aTHX_ coro);
1525 ++coro_nready;
1526
1527 if (sv_hook)
1528 {
1529 dSP;
1530
1531 ENTER;
1532 SAVETMPS;
1533
1534 PUSHMARK (SP);
1535 PUTBACK;
1536 call_sv (sv_hook, G_DISCARD);
1537 SPAGAIN;
1538
1539 FREETMPS;
1540 LEAVE;
1541 }
1542
1543 if (xs_hook)
1544 xs_hook ();
1545
1546 return 1;
1547}
1548
1549static int
1550api_is_ready (pTHX_ SV *coro_sv)
1551{
1552 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1553}
1554
1555INLINE void
1556prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1557{
1558 SV *prev_sv, *next_sv;
1559
1560 for (;;)
1561 {
1562 next_sv = coro_deq (aTHX);
1563
1564 /* nothing to schedule: call the idle handler */
1565 if (expect_false (!next_sv))
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 continue;
1580 }
1581
1582 ta->next = SvSTATE_hv (next_sv);
1583
1584 /* cannot transfer to destroyed coros, skip and look for next */
1585 if (expect_false (ta->next->flags & CF_DESTROYED))
1586 {
1587 SvREFCNT_dec (next_sv);
1588 /* coro_nready has already been taken care of by destroy */
1589 continue;
1590 }
1591
1592 --coro_nready;
1593 break;
1594 }
1595
1596 /* free this only after the transfer */
1597 prev_sv = SvRV (coro_current);
1598 ta->prev = SvSTATE_hv (prev_sv);
1599 TRANSFER_CHECK (*ta);
1600 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1601 ta->next->flags &= ~CF_READY;
1602 SvRV_set (coro_current, next_sv);
1603
1604 free_coro_mortal (aTHX);
1605 coro_mortal = prev_sv;
1606}
1607
1608INLINE void
1609prepare_cede (pTHX_ struct coro_transfer_args *ta)
1610{
1611 api_ready (aTHX_ coro_current);
1612 prepare_schedule (aTHX_ ta);
1613}
1614
1615INLINE void
1616prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1617{
1618 SV *prev = SvRV (coro_current);
1619
1620 if (coro_nready)
1621 {
1622 prepare_schedule (aTHX_ ta);
1623 api_ready (aTHX_ prev);
1624 }
1625 else
1626 prepare_nop (aTHX_ ta);
1627}
1628
1629static void
1630api_schedule (pTHX)
1631{
1632 struct coro_transfer_args ta;
1633
1634 prepare_schedule (aTHX_ &ta);
1635 TRANSFER (ta, 1);
1636}
1637
1638static int
1639api_cede (pTHX)
1640{
1641 struct coro_transfer_args ta;
1642
1643 prepare_cede (aTHX_ &ta);
1644
1645 if (expect_true (ta.prev != ta.next))
1646 {
1647 TRANSFER (ta, 1);
1648 return 1;
1649 }
1650 else
1651 return 0;
1652}
1653
1654static int
1655api_cede_notself (pTHX)
1656{
1657 if (coro_nready)
1658 {
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede_notself (aTHX_ &ta);
1662 TRANSFER (ta, 1);
1663 return 1;
1664 }
1665 else
1666 return 0;
1667}
1668
1669static void
1670api_trace (pTHX_ SV *coro_sv, int flags)
1671{
1672 struct coro *coro = SvSTATE (coro_sv);
1673
1674 if (flags & CC_TRACE)
1675 {
1676 if (!coro->cctx)
1677 coro->cctx = cctx_new_run ();
1678 else if (!(coro->cctx->flags & CC_TRACE))
1679 croak ("cannot enable tracing on coroutine with custom stack,");
1680
1681 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1682 }
1683 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1684 {
1685 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1686
1687 if (coro->flags & CF_RUNNING)
1688 PL_runops = RUNOPS_DEFAULT;
1689 else
1690 coro->slot->runops = RUNOPS_DEFAULT;
1691 }
1692}
1693
1694/*****************************************************************************/
1695/* PerlIO::cede */
1696
1697typedef struct
1698{
1699 PerlIOBuf base;
1700 NV next, every;
1701} PerlIOCede;
1702
1703static IV
1704PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1705{
1706 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1707
1708 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1709 self->next = nvtime () + self->every;
1710
1711 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1712}
1713
1714static SV *
1715PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1716{
1717 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1718
1719 return newSVnv (self->every);
1720}
1721
1722static IV
1723PerlIOCede_flush (pTHX_ PerlIO *f)
1724{
1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726 double now = nvtime ();
1727
1728 if (now >= self->next)
1729 {
1730 api_cede (aTHX);
1731 self->next = now + self->every;
1732 }
1733
1734 return PerlIOBuf_flush (aTHX_ f);
1735}
1736
1737static PerlIO_funcs PerlIO_cede =
1738{
1739 sizeof(PerlIO_funcs),
1740 "cede",
1741 sizeof(PerlIOCede),
1742 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1743 PerlIOCede_pushed,
1744 PerlIOBuf_popped,
1745 PerlIOBuf_open,
1746 PerlIOBase_binmode,
1747 PerlIOCede_getarg,
1748 PerlIOBase_fileno,
1749 PerlIOBuf_dup,
1750 PerlIOBuf_read,
1751 PerlIOBuf_unread,
1752 PerlIOBuf_write,
1753 PerlIOBuf_seek,
1754 PerlIOBuf_tell,
1755 PerlIOBuf_close,
1756 PerlIOCede_flush,
1757 PerlIOBuf_fill,
1758 PerlIOBase_eof,
1759 PerlIOBase_error,
1760 PerlIOBase_clearerr,
1761 PerlIOBase_setlinebuf,
1762 PerlIOBuf_get_base,
1763 PerlIOBuf_bufsiz,
1764 PerlIOBuf_get_ptr,
1765 PerlIOBuf_get_cnt,
1766 PerlIOBuf_set_ptrcnt,
1767};
1768
1769/*****************************************************************************/
1770
1771static const CV *slf_cv; /* for quick consistency check */
1772
1773static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1774static SV *slf_arg0;
1775static SV *slf_arg1;
1776static SV *slf_arg2;
1777
1778/* this restores the stack in the case we patched the entersub, to */
1779/* recreate the stack frame as perl will on following calls */
1780/* since entersub cleared the stack */
1781static OP *
1782pp_restore (pTHX)
1783{
1784 dSP;
1785
1786 PUSHMARK (SP);
1787
1788 EXTEND (SP, 3);
1789 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1790 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1791 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1792 PUSHs ((SV *)CvGV (slf_cv));
1793
1794 RETURNOP (slf_restore.op_first);
1795}
1796
1797static void
1798slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1799{
1800 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1801}
1802
1803static void
1804slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1805{
1806 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1807
1808 frame->prepare = slf_prepare_set_stacklevel;
1809 frame->check = slf_check_nop;
1810 frame->data = (void *)SvIV (arg [0]);
1811}
1812
1813static void
1814slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1815{
1816 SV **arg = (SV **)slf_frame.data;
1817
1818 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1819
1820 /* if the destination has ->throw set, then copy it */
1821 /* into the current coro's throw slot, so it will be raised */
1822 /* after the schedule */
1823 if (expect_false (ta->next->throw))
1824 {
1825 struct coro *coro = SvSTATE_current;
1826 SvREFCNT_dec (coro->throw);
1827 coro->throw = ta->next->throw;
1828 ta->next->throw = 0;
1829 }
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))
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 PUTBACK;
1903
1904 /* now call the init function, which needs to set up slf_frame */
1905 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1906 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1907
1908 /* pop args */
1909 SP = PL_stack_base + POPMARK;
1910
1911 PUTBACK;
1912 }
1913
1914 /* now that we have a slf_frame, interpret it! */
1915 /* we use a callback system not to make the code needlessly */
1916 /* complicated, but so we can run multiple perl coros from one cctx */
1917
1918 do
1919 {
1920 struct coro_transfer_args ta;
1921
1922 slf_frame.prepare (aTHX_ &ta);
1923 TRANSFER (ta, 0);
1924
1925 checkmark = PL_stack_sp - PL_stack_base;
1926 }
1927 while (slf_frame.check (aTHX_ &slf_frame));
1928
1929 {
1930 dSP;
1931 SV **bot = PL_stack_base + checkmark;
1932 int gimme = GIMME_V;
1933
1934 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1935
1936 /* make sure we put something on the stack in scalar context */
1937 if (gimme == G_SCALAR)
1938 {
1939 if (sp == bot)
1940 XPUSHs (&PL_sv_undef);
1941
1942 SP = bot + 1;
1943 }
1944
1945 PUTBACK;
1946 }
1947
1948 {
1949 struct coro *coro = SvSTATE_current;
1950
1951 if (expect_false (coro->throw))
1952 {
1953 SV *exception = sv_2mortal (coro->throw);
1954
1955 coro->throw = 0;
1956 sv_setsv (ERRSV, exception);
1957 croak (0);
1958 }
1959 }
1960
1961 return NORMAL;
1962}
1963
1964static void
1965api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
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 if (items > 3)
1974 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1975
1976 CvFLAGS (cv) |= CVf_SLF;
1977 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1978 slf_cv = cv;
1979
1980 /* we patch the op, and then re-run the whole call */
1981 /* we have to put the same argument on the stack for this to work */
1982 /* and this will be done by pp_restore */
1983 slf_restore.op_next = (OP *)&slf_restore;
1984 slf_restore.op_type = OP_CUSTOM;
1985 slf_restore.op_ppaddr = pp_restore;
1986 slf_restore.op_first = PL_op;
1987
1988 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1989 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1990 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1991
1992 PL_op->op_ppaddr = pp_slf;
1993
1994 PL_op = (OP *)&slf_restore;
1995}
1996
1997/*****************************************************************************/
1998
1999static void
2000coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2001{
2002 SV *count_sv = AvARRAY (av)[0];
2003 IV count = SvIVX (count_sv);
2004
2005 count += adjust;
2006 SvIVX (count_sv) = count;
2007
2008 /* now wake up as many waiters as are expected to lock */
2009 while (count > 0 && AvFILLp (av) > 0)
2010 {
2011 SV *cb;
2012
2013 /* swap first two elements so we can shift a waiter */
2014 AvARRAY (av)[0] = AvARRAY (av)[1];
2015 AvARRAY (av)[1] = count_sv;
2016 cb = av_shift (av);
2017
2018 if (SvOBJECT (cb))
2019 api_ready (aTHX_ cb);
2020 else
2021 croak ("callbacks not yet supported");
2022
2023 SvREFCNT_dec (cb);
2024
2025 --count;
2026 }
2027}
2028
2029static void
2030coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2031{
2032 /* call $sem->adjust (0) to possibly wake up some other waiters */
2033 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2034}
2035
2036static int
2037slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2038{
2039 AV *av = (AV *)frame->data;
2040 SV *count_sv = AvARRAY (av)[0];
2041
2042 if (SvIVX (count_sv) > 0)
2043 {
2044 SvSTATE_current->on_destroy = 0;
2045 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2046 return 0;
2047 }
2048 else
2049 {
2050 int i;
2051 /* if we were woken up but can't down, we look through the whole */
2052 /* waiters list and only add us if we aren't in there already */
2053 /* this avoids some degenerate memory usage cases */
2054
2055 for (i = 1; i <= AvFILLp (av); ++i)
2056 if (AvARRAY (av)[i] == SvRV (coro_current))
2057 return 1;
2058
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060 return 1;
2061 }
2062}
2063
2064static void
2065slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2066{
2067 AV *av = (AV *)SvRV (arg [0]);
2068
2069 if (SvIVX (AvARRAY (av)[0]) > 0)
2070 {
2071 frame->data = (void *)av;
2072 frame->prepare = prepare_nop;
2073 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2074 }
2075 else
2076 {
2077 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2078
2079 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2080 frame->prepare = prepare_schedule;
2081
2082 /* to avoid race conditions when a woken-up coro gets terminated */
2083 /* we arrange for a temporary on_destroy that calls adjust (0) */
2084 assert (!SvSTATE_current->on_destroy);//D
2085 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2086 }
2087
2088 frame->check = slf_check_semaphore_down;
2089
2090}
2091
2092/*****************************************************************************/
2093
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2095
2096/* create a closure from XS, returns a code reference */
2097/* the arg can be accessed via GENSUB_ARG from the callback */
2098/* the callback must use dXSARGS/XSRETURN */
2099static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2101{
2102 CV *cv = (CV *)NEWSV (0, 0);
2103
2104 sv_upgrade ((SV *)cv, SVt_PVCV);
2105
2106 CvANON_on (cv);
2107 CvISXSUB_on (cv);
2108 CvXSUB (cv) = xsub;
2109 GENSUB_ARG = arg;
2110
2111 return newRV_noinc ((SV *)cv);
2112}
2113
2114/*****************************************************************************/
2115
741MODULE = Coro::State PACKAGE = Coro::State 2116MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 2117
743PROTOTYPES: ENABLE 2118PROTOTYPES: DISABLE
744 2119
745BOOT: 2120BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 2121{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2122#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2123# if CORO_PTHREAD
2124 coro_thx = PERL_GET_CONTEXT;
2125# endif
2126#endif
2127 BOOT_PAGESIZE;
2128
2129 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2130 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2131
2132 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2133 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2134 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2135
2136 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2137 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2138 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2139
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2140 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 2141
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2142 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2143 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2144 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2145 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 2146
759 main_mainstack = PL_mainstack; 2147 main_mainstack = PL_mainstack;
760} 2148 main_top_env = PL_top_env;
761 2149
762Coro::State 2150 while (main_top_env->je_prev)
763_newprocess(args) 2151 main_top_env = main_top_env->je_prev;
764 SV * args 2152
765 PROTOTYPE: $ 2153 {
2154 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2155
2156 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2157 hv_store_ent (PL_custom_op_names, slf,
2158 newSVpv ("coro_slf", 0), 0);
2159
2160 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2161 hv_store_ent (PL_custom_op_descs, slf,
2162 newSVpv ("coro schedule like function", 0), 0);
2163 }
2164
2165 coroapi.ver = CORO_API_VERSION;
2166 coroapi.rev = CORO_API_REVISION;
2167
2168 coroapi.transfer = api_transfer;
2169
2170 coroapi.sv_state = SvSTATE_;
2171 coroapi.execute_slf = api_execute_slf;
2172 coroapi.prepare_nop = prepare_nop;
2173 coroapi.prepare_schedule = prepare_schedule;
2174 coroapi.prepare_cede = prepare_cede;
2175 coroapi.prepare_cede_notself = prepare_cede_notself;
2176
2177 {
2178 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2179
2180 if (!svp) croak ("Time::HiRes is required");
2181 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2182
2183 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2184 }
2185
2186 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2187}
2188
2189SV *
2190new (char *klass, ...)
766 CODE: 2191 CODE:
767 Coro__State coro; 2192{
2193 struct coro *coro;
2194 MAGIC *mg;
2195 HV *hv;
2196 int i;
768 2197
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
770 croak ("Coro::State::_newprocess expects an arrayref");
771
772 New (0, coro, 1, struct coro); 2198 Newz (0, coro, 1, struct coro);
2199 coro->args = newAV ();
2200 coro->flags = CF_NEW;
773 2201
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2202 if (coro_first) coro_first->prev = coro;
775 coro->mainstack = 0; /* actual work is done inside transfer */ 2203 coro->next = coro_first;
776 coro->stack = 0; 2204 coro_first = coro;
777 2205
778 RETVAL = coro; 2206 coro->hv = hv = newHV ();
2207 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2208 mg->mg_flags |= MGf_DUP;
2209 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2210
2211 av_extend (coro->args, items - 1);
2212 for (i = 1; i < items; i++)
2213 av_push (coro->args, newSVsv (ST (i)));
2214}
779 OUTPUT: 2215 OUTPUT:
780 RETVAL 2216 RETVAL
781 2217
782void 2218void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2219_set_stacklevel (...)
784 Coro::State_or_hashref prev 2220 CODE:
785 Coro::State_or_hashref next 2221 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
786 int flags
787 PROTOTYPE: @
788 CODE:
789 transfer (aTHX_ prev, next, flags);
790 2222
791void 2223void
792DESTROY(coro) 2224transfer (...)
793 Coro::State coro 2225 PROTOTYPE: $$
794 CODE: 2226 CODE:
2227 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
795 2228
796 if (coro->mainstack && coro->mainstack != main_mainstack) 2229bool
2230_destroy (SV *coro_sv)
2231 CODE:
2232 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2233 OUTPUT:
2234 RETVAL
2235
2236void
2237_exit (int code)
2238 PROTOTYPE: $
2239 CODE:
2240 _exit (code);
2241
2242int
2243cctx_stacksize (int new_stacksize = 0)
2244 PROTOTYPE: ;$
2245 CODE:
2246 RETVAL = cctx_stacksize;
2247 if (new_stacksize)
2248 {
2249 cctx_stacksize = new_stacksize;
2250 ++cctx_gen;
2251 }
2252 OUTPUT:
2253 RETVAL
2254
2255int
2256cctx_max_idle (int max_idle = 0)
2257 PROTOTYPE: ;$
2258 CODE:
2259 RETVAL = cctx_max_idle;
2260 if (max_idle > 1)
2261 cctx_max_idle = max_idle;
2262 OUTPUT:
2263 RETVAL
2264
2265int
2266cctx_count ()
2267 PROTOTYPE:
2268 CODE:
2269 RETVAL = cctx_count;
2270 OUTPUT:
2271 RETVAL
2272
2273int
2274cctx_idle ()
2275 PROTOTYPE:
2276 CODE:
2277 RETVAL = cctx_idle;
2278 OUTPUT:
2279 RETVAL
2280
2281void
2282list ()
2283 PROTOTYPE:
2284 PPCODE:
2285{
2286 struct coro *coro;
2287 for (coro = coro_first; coro; coro = coro->next)
2288 if (coro->hv)
2289 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2290}
2291
2292void
2293call (Coro::State coro, SV *coderef)
2294 ALIAS:
2295 eval = 1
2296 CODE:
2297{
2298 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
797 { 2299 {
798 struct coro temp; 2300 struct coro temp;
799 2301
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2302 if (!(coro->flags & CF_RUNNING))
801 LOAD(aTHX_ coro); 2303 {
2304 PUTBACK;
2305 save_perl (aTHX_ &temp);
2306 load_perl (aTHX_ coro);
2307 }
802 2308
803 destroy_stacks (aTHX); 2309 {
2310 dSP;
2311 ENTER;
2312 SAVETMPS;
2313 PUTBACK;
2314 PUSHSTACK;
2315 PUSHMARK (SP);
804 2316
805 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2317 if (ix)
2318 eval_sv (coderef, 0);
2319 else
2320 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
806 2321
807 coro->mainstack = 0; 2322 POPSTACK;
2323 SPAGAIN;
2324 FREETMPS;
2325 LEAVE;
2326 PUTBACK;
2327 }
2328
2329 if (!(coro->flags & CF_RUNNING))
2330 {
2331 save_perl (aTHX_ coro);
2332 load_perl (aTHX_ &temp);
2333 SPAGAIN;
2334 }
808 } 2335 }
2336}
809 2337
810 deallocate_stack (coro); 2338SV *
811 2339is_ready (Coro::State coro)
812 Safefree (coro); 2340 PROTOTYPE: $
2341 ALIAS:
2342 is_ready = CF_READY
2343 is_running = CF_RUNNING
2344 is_new = CF_NEW
2345 is_destroyed = CF_DESTROYED
2346 CODE:
2347 RETVAL = boolSV (coro->flags & ix);
2348 OUTPUT:
2349 RETVAL
813 2350
814void 2351void
815flush() 2352throw (Coro::State self, SV *throw = &PL_sv_undef)
2353 PROTOTYPE: $;$
2354 CODE:
2355 SvREFCNT_dec (self->throw);
2356 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2357
2358void
2359api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2360 PROTOTYPE: $;$
2361 C_ARGS: aTHX_ coro, flags
2362
2363SV *
2364has_cctx (Coro::State coro)
2365 PROTOTYPE: $
816 CODE: 2366 CODE:
817#ifdef MAY_FLUSH 2367 RETVAL = boolSV (!!coro->cctx);
818 flush_padlist_cache (); 2368 OUTPUT:
819#endif 2369 RETVAL
820 2370
821MODULE = Coro::State PACKAGE = Coro::Cont 2371int
2372is_traced (Coro::State coro)
2373 PROTOTYPE: $
2374 CODE:
2375 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2376 OUTPUT:
2377 RETVAL
822 2378
823# this is slightly dirty 2379UV
2380rss (Coro::State coro)
2381 PROTOTYPE: $
2382 ALIAS:
2383 usecount = 1
2384 CODE:
2385 switch (ix)
2386 {
2387 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2388 case 1: RETVAL = coro->usecount; break;
2389 }
2390 OUTPUT:
2391 RETVAL
824 2392
825void 2393void
826yield(...) 2394force_cctx ()
2395 PROTOTYPE:
2396 CODE:
2397 SvSTATE_current->cctx->idle_sp = 0;
2398
2399void
2400swap_defsv (Coro::State self)
827 PROTOTYPE: @ 2401 PROTOTYPE: $
2402 ALIAS:
2403 swap_defav = 1
828 CODE: 2404 CODE:
829 static SV *returnstk; 2405 if (!self->slot)
830 SV *sv; 2406 croak ("cannot swap state with coroutine that has no saved state,");
2407 else
2408 {
2409 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2410 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2411
2412 SV *tmp = *src; *src = *dst; *dst = tmp;
2413 }
2414
2415MODULE = Coro::State PACKAGE = Coro
2416
2417BOOT:
2418{
2419 int i;
2420
2421 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2422 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2423 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2424
2425 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2426 SvREADONLY_on (coro_current);
2427
2428 coro_stash = gv_stashpv ("Coro", TRUE);
2429
2430 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2431 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2432 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2433 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2434 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2435 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2436
2437 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2438 coro_ready[i] = newAV ();
2439
2440 {
2441 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2442
2443 coroapi.schedule = api_schedule;
2444 coroapi.cede = api_cede;
2445 coroapi.cede_notself = api_cede_notself;
2446 coroapi.ready = api_ready;
2447 coroapi.is_ready = api_is_ready;
2448 coroapi.nready = coro_nready;
2449 coroapi.current = coro_current;
2450
2451 GCoroAPI = &coroapi;
2452 sv_setiv (sv, (IV)&coroapi);
2453 SvREADONLY_on (sv);
2454 }
2455}
2456
2457void
2458schedule (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2461
2462void
2463cede (...)
2464 CODE:
2465 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2466
2467void
2468cede_notself (...)
2469 CODE:
2470 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2471
2472void
2473_set_current (SV *current)
2474 PROTOTYPE: $
2475 CODE:
2476 SvREFCNT_dec (SvRV (coro_current));
2477 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2478
2479void
2480_set_readyhook (SV *hook)
2481 PROTOTYPE: $
2482 CODE:
2483 SvREFCNT_dec (coro_readyhook);
2484 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2485
2486int
2487prio (Coro::State coro, int newprio = 0)
2488 PROTOTYPE: $;$
2489 ALIAS:
2490 nice = 1
2491 CODE:
2492{
2493 RETVAL = coro->prio;
2494
2495 if (items > 1)
2496 {
2497 if (ix)
2498 newprio = coro->prio - newprio;
2499
2500 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2501 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2502
2503 coro->prio = newprio;
2504 }
2505}
2506 OUTPUT:
2507 RETVAL
2508
2509SV *
2510ready (SV *self)
2511 PROTOTYPE: $
2512 CODE:
2513 RETVAL = boolSV (api_ready (aTHX_ self));
2514 OUTPUT:
2515 RETVAL
2516
2517int
2518nready (...)
2519 PROTOTYPE:
2520 CODE:
2521 RETVAL = coro_nready;
2522 OUTPUT:
2523 RETVAL
2524
2525# for async_pool speedup
2526void
2527_pool_1 (SV *cb)
2528 CODE:
2529{
2530 HV *hv = (HV *)SvRV (coro_current);
2531 struct coro *coro = SvSTATE_hv ((SV *)hv);
831 AV *defav = GvAV (PL_defgv); 2532 AV *defav = GvAV (PL_defgv);
832 struct coro *prev, *next; 2533 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2534 AV *invoke_av;
2535 int i, len;
833 2536
834 if (!returnstk) 2537 if (!invoke)
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2538 {
2539 SV *old = PL_diehook;
2540 PL_diehook = 0;
2541 SvREFCNT_dec (old);
2542 croak ("\3async_pool terminate\2\n");
2543 }
836 2544
837 /* set up @_ -- ugly */ 2545 SvREFCNT_dec (coro->saved_deffh);
838 av_clear (defav); 2546 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2547
2548 hv_store (hv, "desc", sizeof ("desc") - 1,
2549 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2550
2551 invoke_av = (AV *)SvRV (invoke);
2552 len = av_len (invoke_av);
2553
2554 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2555
2556 if (len > 0)
2557 {
839 av_fill (defav, items - 1); 2558 av_fill (defav, len - 1);
840 while (items--) 2559 for (i = 0; i < len; ++i)
841 av_store (defav, items, SvREFCNT_inc (ST(items))); 2560 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2561 }
2562}
842 2563
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2564void
844 sv = av_pop ((AV *)SvRV (returnstk)); 2565_pool_2 (SV *cb)
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 2566 CODE:
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 2567{
2568 struct coro *coro = SvSTATE_current;
2569
2570 sv_setsv (cb, &PL_sv_undef);
2571
2572 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2573 coro->saved_deffh = 0;
2574
2575 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2576 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2577 {
2578 SV *old = PL_diehook;
2579 PL_diehook = 0;
847 SvREFCNT_dec (sv); 2580 SvREFCNT_dec (old);
2581 croak ("\3async_pool terminate\2\n");
2582 }
848 2583
849 transfer(aTHX_ prev, next, 0); 2584 av_clear (GvAV (PL_defgv));
2585 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2586 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
850 2587
2588 coro->prio = 0;
2589
2590 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2591 api_trace (aTHX_ coro_current, 0);
2592
2593 av_push (av_async_pool, newSVsv (coro_current));
2594}
2595
2596
2597MODULE = Coro::State PACKAGE = Coro::AIO
2598
2599void
2600_get_state (SV *self)
2601 PROTOTYPE: $
2602 PPCODE:
2603{
2604 AV *defav = GvAV (PL_defgv);
2605 AV *av = newAV ();
2606 int i;
2607 SV *data_sv = newSV (sizeof (struct io_state));
2608 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2609 SvCUR_set (data_sv, sizeof (struct io_state));
2610 SvPOK_only (data_sv);
2611
2612 data->errorno = errno;
2613 data->laststype = PL_laststype;
2614 data->laststatval = PL_laststatval;
2615 data->statcache = PL_statcache;
2616
2617 av_extend (av, AvFILLp (defav) + 1 + 1);
2618
2619 for (i = 0; i <= AvFILLp (defav); ++i)
2620 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2621
2622 av_push (av, data_sv);
2623
2624 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2625
2626 api_ready (aTHX_ self);
2627}
2628
2629void
2630_set_state (SV *state)
2631 PROTOTYPE: $
2632 PPCODE:
2633{
2634 AV *av = (AV *)SvRV (state);
2635 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2636 int i;
2637
2638 errno = data->errorno;
2639 PL_laststype = data->laststype;
2640 PL_laststatval = data->laststatval;
2641 PL_statcache = data->statcache;
2642
2643 EXTEND (SP, AvFILLp (av));
2644 for (i = 0; i < AvFILLp (av); ++i)
2645 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2646}
2647
2648
2649MODULE = Coro::State PACKAGE = Coro::AnyEvent
2650
2651BOOT:
2652 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2653
2654void
2655_schedule (...)
2656 CODE:
2657{
2658 static int incede;
2659
2660 api_cede_notself (aTHX);
2661
2662 ++incede;
2663 while (coro_nready >= incede && api_cede (aTHX))
2664 ;
2665
2666 sv_setsv (sv_activity, &PL_sv_undef);
2667 if (coro_nready >= incede)
2668 {
2669 PUSHMARK (SP);
2670 PUTBACK;
2671 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2672 SPAGAIN;
2673 }
2674
2675 --incede;
2676}
2677
2678
2679MODULE = Coro::State PACKAGE = PerlIO::cede
2680
2681BOOT:
2682 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2683
2684MODULE = Coro::State PACKAGE = Coro::Semaphore
2685
2686SV *
2687new (SV *klass, SV *count_ = 0)
2688 CODE:
2689{
2690 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2691 AV *av = newAV ();
2692 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2693 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2694}
2695 OUTPUT:
2696 RETVAL
2697
2698SV *
2699count (SV *self)
2700 CODE:
2701 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2702 OUTPUT:
2703 RETVAL
2704
2705void
2706up (SV *self, int adjust = 1)
2707 ALIAS:
2708 adjust = 1
2709 CODE:
2710 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2711
2712void
2713down (SV *self)
2714 CODE:
2715 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2716
2717void
2718try (SV *self)
2719 PPCODE:
2720{
2721 AV *av = (AV *)SvRV (self);
2722 SV *count_sv = AvARRAY (av)[0];
2723 IV count = SvIVX (count_sv);
2724
2725 if (count > 0)
2726 {
2727 --count;
2728 SvIVX (count_sv) = count;
2729 XSRETURN_YES;
2730 }
2731 else
2732 XSRETURN_NO;
2733}
2734
2735void
2736waiters (SV *self)
2737 CODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740
2741 if (GIMME_V == G_SCALAR)
2742 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2743 else
2744 {
2745 int i;
2746 EXTEND (SP, AvFILLp (av) + 1 - 1);
2747 for (i = 1; i <= AvFILLp (av); ++i)
2748 PUSHs (newSVsv (AvARRAY (av)[i]));
2749 }
2750}
2751

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