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Comparing Coro/Coro/State.xs (file contents):
Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs.
Revision 1.249 by root, Tue Sep 30 17:12:35 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>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
13# else 32# else
14# undef HAVE_MMAP 33# undef HAVE_MMAP
15# endif 34# endif
16# 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
17#endif 43# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 44#else
30# 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# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
31#endif 68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
32 85
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 86/* 5.8.8 */
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
35 93
36#define SUB_INIT "Coro::State::initialize" 94/* 5.11 */
37#define UCORO_STATE "_coro_state" 95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
38 98
39/* The next macro should delcare a variable stacklevel that contains and approximation 99/* 5.8.7 */
40 * to the current C stack pointer. It's property is that it changes with each call 100#ifndef SvRV_set
41 * and should be unique. */ 101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
103
104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
105# undef CORO_STACKGUARD
106#endif
107
108#ifndef CORO_STACKGUARD
109# define CORO_STACKGUARD 0
110#endif
111
112/* prefer perl internal functions over our own? */
113#ifndef CORO_PREFER_PERL_FUNCTIONS
114# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif
116
117/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */
119#define dSTACKLEVEL volatile char stacklevel
42#define dSTACKLEVEL void *stacklevel = &stacklevel 120#define STACKLEVEL ((void *)&stacklevel)
43 121
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 123
46/* this is actually not only the c stack but also c registers etc... */ 124#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
128#else
129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
136
137#define NOINLINE attribute ((noinline))
138
139#include "CoroAPI.h"
140
141#ifdef USE_ITHREADS
142static perl_mutex coro_mutex;
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif
149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 AV *res;
154 int errorno;
155 I32 laststype;
156 int laststatval;
157 Stat_t statcache;
158};
159
160static double (*nvtime)(); /* so why doesn't it take void? */
161
162static size_t coro_stacksize = CORO_STACKSIZE;
163static struct CoroAPI coroapi;
164static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env;
166static HV *coro_state_stash, *coro_stash;
167static volatile SV *coro_mortal; /* will be freed after next transfer */
168
169static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook;
172static SV *rv_warnhook;
173static HV *hv_sig; /* %SIG */
174
175/* async_pool helper stuff */
176static SV *sv_pool_rss;
177static SV *sv_pool_size;
178static AV *av_async_pool;
179
180/* Coro::AnyEvent */
181static SV *sv_activity;
182
183static struct coro_cctx *cctx_first;
184static int cctx_count, cctx_idle;
185
186enum {
187 CC_MAPPED = 0x01,
188 CC_NOREUSE = 0x02, /* throw this away after tracing */
189 CC_TRACE = 0x04,
190 CC_TRACE_SUB = 0x08, /* trace sub calls */
191 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193};
194
195/* this is a structure representing a c-level coroutine */
196typedef struct coro_cctx {
197 struct coro_cctx *next;
198
199 /* the stack */
200 void *sptr;
201 size_t ssize;
202
203 /* cpu state */
204 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
205 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
206 JMPENV *top_env;
207 coro_context cctx;
208
209#if CORO_USE_VALGRIND
210 int valgrind_id;
211#endif
212 unsigned char flags;
213} coro_cctx;
214
215enum {
216 CF_RUNNING = 0x0001, /* coroutine is running */
217 CF_READY = 0x0002, /* coroutine is ready */
218 CF_NEW = 0x0004, /* has never been switched to */
219 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
220};
221
222/* the structure where most of the perl state is stored, overlaid on the cxstack */
47typedef struct { 223typedef struct {
48 int refcnt; /* pointer reference counter */ 224 SV *defsv;
49 int usecnt; /* shared by how many coroutines */ 225 AV *defav;
50 int gencnt; /* generation counter */ 226 SV *errsv;
227 SV *irsgv;
228#define VAR(name,type) type name;
229# include "state.h"
230#undef VAR
231} perl_slots;
51 232
52 coro_context cctx; 233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53 234
54 void *sptr; 235/* this is a structure representing a perl-level coroutine */
55 long ssize; /* positive == mmap, otherwise malloc */
56} coro_stack;
57
58static coro_stack main_stack = { 1, 0, 0 };
59
60struct coro { 236struct coro {
61 /* the optional C context */ 237 /* the c coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 238 coro_cctx *cctx;
63 void *cursp;
64 int gencnt;
65 239
66 /* optionally saved, might be zero */ 240 /* process data */
67 AV *defav;
68 SV *defsv;
69 SV *errsv;
70
71 /* saved global state not related to stacks */
72 U8 dowarn;
73
74 /* the stacks and related info (callchain etc..) */
75 PERL_SI *curstackinfo;
76 AV *curstack;
77 AV *mainstack; 241 AV *mainstack;
78 SV **stack_sp; 242 perl_slots *slot; /* basically the saved sp */
79 OP *op;
80 SV **curpad;
81 SV **stack_base;
82 SV **stack_max;
83 SV **tmps_stack;
84 I32 tmps_floor;
85 I32 tmps_ix;
86 I32 tmps_max;
87 I32 *markstack;
88 I32 *markstack_ptr;
89 I32 *markstack_max;
90 I32 *scopestack;
91 I32 scopestack_ix;
92 I32 scopestack_max;
93 ANY *savestack;
94 I32 savestack_ix;
95 I32 savestack_max;
96 OP **retstack;
97 I32 retstack_ix;
98 I32 retstack_max;
99 COP *curcop;
100 JMPENV start_env;
101 JMPENV *top_env;
102 243
103 /* data associated with this coroutine (initial args) */ 244 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 245 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
251
252 /* coro process data */
253 int prio;
254 SV *throw; /* exception to be thrown */
255
256 /* async_pool */
257 SV *saved_deffh;
258
259 /* linked list */
260 struct coro *next, *prev;
105}; 261};
106 262
107typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
109 265
110static AV *main_mainstack; /* used to differentiate between $main and others */ 266/** Coro ********************************************************************/
111static HV *coro_state_stash;
112static SV *ucoro_state_sv;
113static U32 ucoro_state_hash;
114static HV *padlist_cache;
115 267
116/* mostly copied from op.c:cv_clone2 */ 268#define PRIO_MAX 3
117STATIC AV * 269#define PRIO_HIGH 1
118clone_padlist (AV *protopadlist) 270#define PRIO_NORMAL 0
271#define PRIO_LOW -1
272#define PRIO_IDLE -3
273#define PRIO_MIN -4
274
275/* for Coro.pm */
276static SV *coro_current;
277static SV *coro_readyhook;
278static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
279static int coro_nready;
280static struct coro *coro_first;
281
282/** lowlevel stuff **********************************************************/
283
284static SV *
285coro_get_sv (pTHX_ const char *name, int create)
119{ 286{
120 AV *av; 287#if PERL_VERSION_ATLEAST (5,10,0)
121 I32 ix; 288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 289 get_sv (name, create);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 290#endif
124 SV **pname = AvARRAY (protopad_name); 291 return get_sv (name, create);
125 SV **ppad = AvARRAY (protopad); 292}
126 I32 fname = AvFILLp (protopad_name); 293
127 I32 fpad = AvFILLp (protopad); 294static AV *
295coro_get_av (pTHX_ const char *name, int create)
296{
297#if PERL_VERSION_ATLEAST (5,10,0)
298 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
299 get_av (name, create);
300#endif
301 return get_av (name, create);
302}
303
304static HV *
305coro_get_hv (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_hv (name, create);
310#endif
311 return get_hv (name, create);
312}
313
314static AV *
315coro_clone_padlist (pTHX_ CV *cv)
316{
317 AV *padlist = CvPADLIST (cv);
128 AV *newpadlist, *newpad_name, *newpad; 318 AV *newpadlist, *newpad;
129 SV **npad;
130
131 newpad_name = newAV ();
132 for (ix = fname; ix >= 0; ix--)
133 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135 newpad = newAV ();
136 av_fill (newpad, AvFILLp (protopad));
137 npad = AvARRAY (newpad);
138 319
139 newpadlist = newAV (); 320 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 321 AvREAL_off (newpadlist);
141 av_store (newpadlist, 0, (SV *) newpad_name); 322#if PERL_VERSION_ATLEAST (5,10,0)
323 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
324#else
325 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
326#endif
327 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
328 --AvFILLp (padlist);
329
330 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
142 av_store (newpadlist, 1, (SV *) newpad); 331 av_store (newpadlist, 1, (SV *)newpad);
143 332
144 av = newAV (); /* will be @_ */ 333 return newpadlist;
145 av_extend (av, 0); 334}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 335
149 for (ix = fpad; ix > 0; ix--) 336static void
337free_padlist (pTHX_ AV *padlist)
338{
339 /* may be during global destruction */
340 if (SvREFCNT (padlist))
150 { 341 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 342 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 343 while (i >= 0)
153 { 344 {
154 char *name = SvPVX (namesv); /* XXX */ 345 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 346 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 347 {
159 else
160 { /* our own lexical */
161 SV *sv; 348 SV *sv;
162 if (*name == '&') 349 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 350 SvREFCNT_dec (sv);
164 else if (*name == '@') 351
165 sv = (SV *) newAV (); 352 SvREFCNT_dec (*svp);
166 else if (*name == '%')
167 sv = (SV *) newHV ();
168 else
169 sv = NEWSV (0, 0);
170 if (!SvPADBUSY (sv))
171 SvPADMY_on (sv);
172 npad[ix] = sv;
173 } 353 }
174 } 354 }
175 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
176 {
177 npad[ix] = SvREFCNT_inc (ppad[ix]);
178 }
179 else
180 {
181 SV *sv = NEWSV (0, 0);
182 SvPADTMP_on (sv);
183 npad[ix] = sv;
184 }
185 }
186 355
187#if 0 /* return -ENOTUNDERSTOOD */
188 /* Now that vars are all in place, clone nested closures. */
189
190 for (ix = fpad; ix > 0; ix--) {
191 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192 if (namesv
193 && namesv != &PL_sv_undef
194 && !(SvFLAGS(namesv) & SVf_FAKE)
195 && *SvPVX(namesv) == '&'
196 && CvCLONE(ppad[ix]))
197 {
198 CV *kid = cv_clone((CV*)ppad[ix]);
199 SvREFCNT_dec(ppad[ix]);
200 CvCLONE_on(kid);
201 SvPADMY_on(kid);
202 npad[ix] = (SV*)kid;
203 }
204 }
205#endif
206
207 return newpadlist;
208}
209
210#ifdef MAY_FLUSH
211STATIC AV *
212free_padlist (AV *padlist)
213{
214 /* may be during global destruction */
215 if (SvREFCNT(padlist))
216 {
217 I32 i = AvFILLp(padlist);
218 while (i >= 0)
219 {
220 SV **svp = av_fetch(padlist, i--, FALSE);
221 SV *sv = svp ? *svp : Nullsv;
222 if (sv)
223 SvREFCNT_dec(sv);
224 }
225
226 SvREFCNT_dec((SV*)padlist); 356 SvREFCNT_dec ((SV*)padlist);
227 } 357 }
228} 358}
229#endif 359
360static int
361coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
362{
363 AV *padlist;
364 AV *av = (AV *)mg->mg_obj;
365
366 /* casting is fun. */
367 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
368 free_padlist (aTHX_ padlist);
369
370 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
371
372 return 0;
373}
374
375#define CORO_MAGIC_type_cv PERL_MAGIC_ext
376#define CORO_MAGIC_type_state PERL_MAGIC_ext
377
378static MGVTBL coro_cv_vtbl = {
379 0, 0, 0, 0,
380 coro_cv_free
381};
382
383#define CORO_MAGIC(sv,type) \
384 SvMAGIC (sv) \
385 ? SvMAGIC (sv)->mg_type == type \
386 ? SvMAGIC (sv) \
387 : mg_find (sv, type) \
388 : 0
389
390#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
391#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
392
393static struct coro *
394SvSTATE_ (pTHX_ SV *coro)
395{
396 HV *stash;
397 MAGIC *mg;
398
399 if (SvROK (coro))
400 coro = SvRV (coro);
401
402 if (expect_false (SvTYPE (coro) != SVt_PVHV))
403 croak ("Coro::State object required");
404
405 stash = SvSTASH (coro);
406 if (expect_false (stash != coro_stash && stash != coro_state_stash))
407 {
408 /* very slow, but rare, check */
409 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
410 croak ("Coro::State object required");
411 }
412
413 mg = CORO_MAGIC_state (coro);
414 return (struct coro *)mg->mg_ptr;
415}
416
417#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
230 418
231/* the next two functions merely cache the padlists */ 419/* the next two functions merely cache the padlists */
232STATIC void 420static void
233get_padlist (CV *cv) 421get_padlist (pTHX_ CV *cv)
234{ 422{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 423 MAGIC *mg = CORO_MAGIC_cv (cv);
424 AV *av;
236 425
237 if (he && AvFILLp ((AV *)*he) >= 0) 426 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 427 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239 else 428 else
240 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241}
242
243STATIC void
244put_padlist (CV *cv)
245{
246 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248 if (SvTYPE (*he) != SVt_PVAV)
249 { 429 {
430#if CORO_PREFER_PERL_FUNCTIONS
431 /* this is probably cleaner? but also slower! */
432 /* in practise, it seems to be less stable */
433 CV *cp = Perl_cv_clone (cv);
434 CvPADLIST (cv) = CvPADLIST (cp);
435 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (*he); 436 SvREFCNT_dec (cp);
251 *he = (SV *)newAV (); 437#else
438 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
439#endif
252 } 440 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 441}
256
257#ifdef MAY_FLUSH
258STATIC void
259flush_padlist_cache ()
260{
261 HV *hv = padlist_cache;
262 padlist_cache = newHV ();
263
264 if (hv_iterinit (hv))
265 {
266 HE *he;
267 AV *padlist;
268
269 while (!!(he = hv_iternext (hv)))
270 {
271 AV *av = (AV *)HeVAL(he);
272
273 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (padlist);
276 }
277 }
278
279 SvREFCNT_dec (hv);
280}
281#endif
282
283#define SB do {
284#define SE } while (0)
285
286#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
287#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
288
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
290 442
291static void 443static void
444put_padlist (pTHX_ CV *cv)
445{
446 MAGIC *mg = CORO_MAGIC_cv (cv);
447 AV *av;
448
449 if (expect_false (!mg))
450 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
451
452 av = (AV *)mg->mg_obj;
453
454 if (expect_false (AvFILLp (av) >= AvMAX (av)))
455 av_extend (av, AvMAX (av) + 1);
456
457 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
458}
459
460/** load & save, init *******************************************************/
461
462static void
292load_state(pTHX_ Coro__State c) 463load_perl (pTHX_ Coro__State c)
293{ 464{
294 PL_dowarn = c->dowarn; 465 perl_slots *slot = c->slot;
466 c->slot = 0;
295 467
296 PL_curstackinfo = c->curstackinfo;
297 PL_curstack = c->curstack;
298 PL_mainstack = c->mainstack; 468 PL_mainstack = c->mainstack;
299 PL_stack_sp = c->stack_sp;
300 PL_op = c->op;
301 PL_curpad = c->curpad;
302 PL_stack_base = c->stack_base;
303 PL_stack_max = c->stack_max;
304 PL_tmps_stack = c->tmps_stack;
305 PL_tmps_floor = c->tmps_floor;
306 PL_tmps_ix = c->tmps_ix;
307 PL_tmps_max = c->tmps_max;
308 PL_markstack = c->markstack;
309 PL_markstack_ptr = c->markstack_ptr;
310 PL_markstack_max = c->markstack_max;
311 PL_scopestack = c->scopestack;
312 PL_scopestack_ix = c->scopestack_ix;
313 PL_scopestack_max = c->scopestack_max;
314 PL_savestack = c->savestack;
315 PL_savestack_ix = c->savestack_ix;
316 PL_savestack_max = c->savestack_max;
317 PL_retstack = c->retstack;
318 PL_retstack_ix = c->retstack_ix;
319 PL_retstack_max = c->retstack_max;
320 PL_curcop = c->curcop;
321 PL_start_env = c->start_env;
322 PL_top_env = c->top_env;
323 469
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 470 GvSV (PL_defgv) = slot->defsv;
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 471 GvAV (PL_defgv) = slot->defav;
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 472 GvSV (PL_errgv) = slot->errsv;
473 GvSV (irsgv) = slot->irsgv;
474
475 #define VAR(name,type) PL_ ## name = slot->name;
476 # include "state.h"
477 #undef VAR
327 478
328 { 479 {
329 dSP; 480 dSP;
481
330 CV *cv; 482 CV *cv;
331 483
332 /* now do the ugly restore mess */ 484 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 485 while (expect_true (cv = (CV *)POPs))
334 { 486 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 487 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 488 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 489 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 490 }
348 491
349 PUTBACK; 492 PUTBACK;
350 } 493 }
351} 494}
352 495
353static void 496static void
354save_state(pTHX_ Coro__State c, int flags) 497save_perl (pTHX_ Coro__State c)
355{ 498{
356 { 499 {
357 dSP; 500 dSP;
358 I32 cxix = cxstack_ix; 501 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 502 PERL_CONTEXT *ccstk = cxstack;
… …
362 /* 505 /*
363 * the worst thing you can imagine happens first - we have to save 506 * the worst thing you can imagine happens first - we have to save
364 * (and reinitialize) all cv's in the whole callchain :( 507 * (and reinitialize) all cv's in the whole callchain :(
365 */ 508 */
366 509
367 PUSHs (Nullsv); 510 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 511 /* this loop was inspired by pp_caller */
369 for (;;) 512 for (;;)
370 { 513 {
371 do 514 while (expect_true (cxix >= 0))
372 { 515 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 516 PERL_CONTEXT *cx = &ccstk[cxix--];
374 517
375 if (CxTYPE(cx) == CXt_SUB) 518 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376 { 519 {
377 CV *cv = cx->blk_sub.cv; 520 CV *cv = cx->blk_sub.cv;
521
378 if (CvDEPTH(cv)) 522 if (expect_true (CvDEPTH (cv)))
379 { 523 {
380#ifdef USE_THREADS
381 /*XPUSHs ((SV *)CvOWNER(cv));*/
382 /*CvOWNER(cv) = 0;*/
383 /*error must unlock this cv etc.. etc...*/
384#endif
385 EXTEND (SP, CvDEPTH(cv)*2); 524 EXTEND (SP, 3);
386
387 while (--CvDEPTH(cv))
388 {
389 /* this tells the restore code to increment CvDEPTH */
390 PUSHs (Nullsv);
391 PUSHs ((SV *)cv);
392 }
393
394 PUSHs ((SV *)CvPADLIST(cv)); 525 PUSHs ((SV *)CvPADLIST (cv));
526 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 527 PUSHs ((SV *)cv);
396 528
397 get_padlist (cv); /* this is a monster */ 529 CvDEPTH (cv) = 0;
530 get_padlist (aTHX_ cv);
398 } 531 }
399 } 532 }
400 else if (CxTYPE(cx) == CXt_FORMAT)
401 {
402 /* I never used formats, so how should I know how these are implemented? */
403 /* my bold guess is as a simple, plain sub... */
404 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405 }
406 } 533 }
407 while (cxix >= 0);
408 534
409 if (top_si->si_type == PERLSI_MAIN) 535 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 536 break;
411 537
412 top_si = top_si->si_prev; 538 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 539 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 540 cxix = top_si->si_cxix;
415 } 541 }
416 542
417 PUTBACK; 543 PUTBACK;
418 } 544 }
419 545
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 546 /* allocate some space on the context stack for our purposes */
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 547 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 548 if (SLOT_COUNT >= 1) CXINC;
549 if (SLOT_COUNT >= 2) CXINC;
550 if (SLOT_COUNT >= 3) CXINC;
551 {
552 int i;
553 for (i = 3; i < SLOT_COUNT; ++i)
554 CXINC;
555 }
556 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 557
424 /* I have not the slightest idea of why av_reify is necessary */
425 /* but if it's missing the defav contents magically get replaced sometimes */
426 if (c->defav)
427 av_reify (c->defav);
428
429 c->dowarn = PL_dowarn;
430
431 c->curstackinfo = PL_curstackinfo;
432 c->curstack = PL_curstack;
433 c->mainstack = PL_mainstack; 558 c->mainstack = PL_mainstack;
434 c->stack_sp = PL_stack_sp; 559
435 c->op = PL_op; 560 {
436 c->curpad = PL_curpad; 561 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
437 c->stack_base = PL_stack_base; 562
438 c->stack_max = PL_stack_max; 563 slot->defav = GvAV (PL_defgv);
439 c->tmps_stack = PL_tmps_stack; 564 slot->defsv = DEFSV;
440 c->tmps_floor = PL_tmps_floor; 565 slot->errsv = ERRSV;
441 c->tmps_ix = PL_tmps_ix; 566 slot->irsgv = GvSV (irsgv);
442 c->tmps_max = PL_tmps_max; 567
443 c->markstack = PL_markstack; 568 #define VAR(name,type) slot->name = PL_ ## name;
444 c->markstack_ptr = PL_markstack_ptr; 569 # include "state.h"
445 c->markstack_max = PL_markstack_max; 570 #undef VAR
446 c->scopestack = PL_scopestack; 571 }
447 c->scopestack_ix = PL_scopestack_ix;
448 c->scopestack_max = PL_scopestack_max;
449 c->savestack = PL_savestack;
450 c->savestack_ix = PL_savestack_ix;
451 c->savestack_max = PL_savestack_max;
452 c->retstack = PL_retstack;
453 c->retstack_ix = PL_retstack_ix;
454 c->retstack_max = PL_retstack_max;
455 c->curcop = PL_curcop;
456 c->start_env = PL_start_env;
457 c->top_env = PL_top_env;
458} 572}
459 573
460/* 574/*
461 * allocate various perl stacks. This is an exact copy 575 * allocate various perl stacks. This is an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 576 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 577 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 578 * not usually need a lot of stackspace.
465 */ 579 */
466STATIC void 580#if CORO_PREFER_PERL_FUNCTIONS
581# define coro_init_stacks init_stacks
582#else
583static void
467coro_init_stacks (pTHX) 584coro_init_stacks (pTHX)
468{ 585{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 586 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 587 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 588 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 589 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 590
474 PL_stack_base = AvARRAY(PL_curstack); 591 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 592 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 593 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 594
478 New(50,PL_tmps_stack,96,SV*); 595 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 596 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 597 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 598 PL_tmps_max = 32;
482 599
483 New(54,PL_markstack,16,I32); 600 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 601 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 602 PL_markstack_max = PL_markstack + 16;
486 603
604#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 605 SET_MARK_OFFSET;
606#endif
488 607
489 New(54,PL_scopestack,16,I32); 608 New(54,PL_scopestack,8,I32);
490 PL_scopestack_ix = 0; 609 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 610 PL_scopestack_max = 8;
492 611
493 New(54,PL_savestack,96,ANY); 612 New(54,PL_savestack,24,ANY);
494 PL_savestack_ix = 0; 613 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 614 PL_savestack_max = 24;
496 615
616#if !PERL_VERSION_ATLEAST (5,10,0)
497 New(54,PL_retstack,8,OP*); 617 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 618 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 619 PL_retstack_max = 4;
620#endif
500} 621}
622#endif
501 623
502/* 624/*
503 * destroy the stacks, the callchain etc... 625 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 626 */
506STATIC void 627static void
507destroy_stacks(pTHX) 628coro_destroy_stacks (pTHX)
508{ 629{
509 /* is this ugly, I ask? */
510 while (PL_scopestack_ix)
511 LEAVE;
512
513 /* sure it is, but more important: is it correct?? :/ */
514 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515 FREETMPS;
516
517 while (PL_curstackinfo->si_next) 630 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 631 PL_curstackinfo = PL_curstackinfo->si_next;
519 632
520 while (PL_curstackinfo) 633 while (PL_curstackinfo)
521 { 634 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 635 PERL_SI *p = PL_curstackinfo->si_prev;
523 636
524 { 637 if (!IN_DESTRUCT)
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 dounwind(-1);
531
532 SvREFCNT_dec(PL_curstackinfo->si_stack); 638 SvREFCNT_dec (PL_curstackinfo->si_stack);
639
533 Safefree(PL_curstackinfo->si_cxstack); 640 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 641 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 642 PL_curstackinfo = p;
536 } 643 }
537 644
538 Safefree(PL_tmps_stack); 645 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 646 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 647 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 648 Safefree (PL_savestack);
649#if !PERL_VERSION_ATLEAST (5,10,0)
542 Safefree(PL_retstack); 650 Safefree (PL_retstack);
651#endif
652}
653
654static size_t
655coro_rss (pTHX_ struct coro *coro)
656{
657 size_t rss = sizeof (*coro);
658
659 if (coro->mainstack)
660 {
661 perl_slots tmp_slot;
662 perl_slots *slot;
663
664 if (coro->flags & CF_RUNNING)
665 {
666 slot = &tmp_slot;
667
668 #define VAR(name,type) slot->name = PL_ ## name;
669 # include "state.h"
670 #undef VAR
671 }
672 else
673 slot = coro->slot;
674
675 if (slot)
676 {
677 rss += sizeof (slot->curstackinfo);
678 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
679 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
680 rss += slot->tmps_max * sizeof (SV *);
681 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
682 rss += slot->scopestack_max * sizeof (I32);
683 rss += slot->savestack_max * sizeof (ANY);
684
685#if !PERL_VERSION_ATLEAST (5,10,0)
686 rss += slot->retstack_max * sizeof (OP *);
687#endif
688 }
689 }
690
691 return rss;
692}
693
694/** coroutine stack handling ************************************************/
695
696static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
698static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
699
700/* apparently < 5.8.8 */
701#ifndef MgPV_nolen_const
702#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
703 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
704 (const char*)(mg)->mg_ptr)
705#endif
706
707/*
708 * This overrides the default magic get method of %SIG elements.
709 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
710 * and instead of tryign to save and restore the hash elements, we just provide
711 * readback here.
712 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
713 * not expecting this to actually change the hook. This is a potential problem
714 * when a schedule happens then, but we ignore this.
715 */
716static int
717coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
718{
719 const char *s = MgPV_nolen_const (mg);
720
721 if (*s == '_')
722 {
723 SV **svp = 0;
724
725 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
726 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
727
728 if (svp)
729 {
730 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
731 return 0;
732 }
733 }
734
735 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
736}
737
738static int
739coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
740{
741 const char *s = MgPV_nolen_const (mg);
742
743 if (*s == '_')
744 {
745 SV **svp = 0;
746
747 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
748 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
749
750 if (svp)
751 {
752 SV *old = *svp;
753 *svp = 0;
754 SvREFCNT_dec (old);
755 return 0;
756 }
757 }
758
759 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
760}
761
762static int
763coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
764{
765 const char *s = MgPV_nolen_const (mg);
766
767 if (*s == '_')
768 {
769 SV **svp = 0;
770
771 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773
774 if (svp)
775 {
776 SV *old = *svp;
777 *svp = newSVsv (sv);
778 SvREFCNT_dec (old);
779 return 0;
780 }
781 }
782
783 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
543} 784}
544 785
545static void 786static void
546allocate_stack (Coro__State ctx, int alloc) 787coro_setup (pTHX_ struct coro *coro)
547{
548 coro_stack *stack;
549
550 New (0, stack, 1, coro_stack);
551
552 stack->refcnt = 1;
553 stack->usecnt = 1;
554 stack->gencnt = ctx->gencnt = 0;
555 if (alloc)
556 {
557#ifdef HAVE_MMAP
558 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
559 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560 if (stack->sptr == (void *)-1)
561#endif
562 {
563 /*FIXME*//*D*//* reasonable stack size! */
564 stack->ssize = -4096 * sizeof (long);
565 New (0, stack->sptr, 4096, long);
566 }
567 }
568 else
569 stack->sptr = 0;
570
571 ctx->stack = stack;
572}
573
574static void
575deallocate_stack (Coro__State ctx)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
583 if (!--stack->refcnt)
584 {
585#ifdef HAVE_MMAP
586 if (stack->ssize > 0 && stack->sptr)
587 munmap (stack->sptr, stack->ssize);
588 else
589#else
590 Safefree (stack->sptr);
591#endif
592 Safefree (stack);
593 }
594 else if (ctx->gencnt == stack->gencnt)
595 --stack->usecnt;
596 }
597}
598
599static void
600setup_coro (void *arg)
601{ 788{
602 /* 789 /*
603 * emulate part of the perl startup here. 790 * emulate part of the perl startup here.
604 */ 791 */
605 dSP;
606 Coro__State ctx = (Coro__State)arg;
607 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608
609 coro_init_stacks (aTHX); 792 coro_init_stacks (aTHX);
610 JMPENV_BOOTSTRAP; 793
794 PL_runops = RUNOPS_DEFAULT;
795 PL_curcop = &PL_compiling;
796 PL_in_eval = EVAL_NULL;
797 PL_comppad = 0;
798 PL_curpm = 0;
799 PL_curpad = 0;
800 PL_localizing = 0;
801 PL_dirty = 0;
802 PL_restartop = 0;
803#if PERL_VERSION_ATLEAST (5,10,0)
804 PL_parser = 0;
805#endif
806
807 /* recreate the die/warn hooks */
808 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
809 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
810
811 GvSV (PL_defgv) = newSV (0);
812 GvAV (PL_defgv) = coro->args; coro->args = 0;
813 GvSV (PL_errgv) = newSV (0);
814 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
815 PL_rs = newSVsv (GvSV (irsgv));
816 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
817
818 {
819 dSP;
820 LOGOP myop;
821
822 Zero (&myop, 1, LOGOP);
823 myop.op_next = Nullop;
824 myop.op_flags = OPf_WANT_VOID;
825
826 PUSHMARK (SP);
827 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
828 PUTBACK;
829 PL_op = (OP *)&myop;
830 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611 SPAGAIN; 831 SPAGAIN;
832 }
612 833
613 /*PL_curcop = 0;*/ 834 /* this newly created coroutine might be run on an existing cctx which most
835 * likely was suspended in set_stacklevel, called from entersub.
836 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837 * so we ENTER here for symmetry
838 */
839 ENTER;
840}
841
842static void
843coro_destroy (pTHX_ struct coro *coro)
844{
845 if (!IN_DESTRUCT)
846 {
847 /* restore all saved variables and stuff */
848 LEAVE_SCOPE (0);
849 assert (PL_tmps_floor == -1);
850
851 /* free all temporaries */
852 FREETMPS;
853 assert (PL_tmps_ix == -1);
854
855 /* unwind all extra stacks */
856 POPSTACK_TO (PL_mainstack);
857
858 /* unwind main stack */
859 dounwind (-1);
860 }
861
862 SvREFCNT_dec (GvSV (PL_defgv));
614 SvREFCNT_dec (GvAV (PL_defgv)); 863 SvREFCNT_dec (GvAV (PL_defgv));
615 GvAV (PL_defgv) = ctx->args; 864 SvREFCNT_dec (GvSV (PL_errgv));
865 SvREFCNT_dec (PL_defoutgv);
866 SvREFCNT_dec (PL_rs);
867 SvREFCNT_dec (GvSV (irsgv));
616 868
617 if (ctx->stack) 869 SvREFCNT_dec (PL_diehook);
618 { 870 SvREFCNT_dec (PL_warnhook);
619 ctx->cursp = 0; 871
872 SvREFCNT_dec (coro->saved_deffh);
873 SvREFCNT_dec (coro->throw);
620 874
621 PUSHMARK(SP); 875 coro_destroy_stacks (aTHX);
622 PUTBACK;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS);
624 croak ("FATAL: CCTXT coroutine returned!");
625 }
626 else
627 {
628 UNOP myop;
629
630 PL_op = (OP *)&myop;
631
632 Zero(&myop, 1, UNOP);
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = pp_entersub();
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 }
651} 876}
652 877
653static void 878static void
654continue_coro (void *arg) 879free_coro_mortal (pTHX)
655{ 880{
656 /* 881 if (expect_true (coro_mortal))
657 * this is a _very_ stripped down perl interpreter ;) 882 {
658 */ 883 SvREFCNT_dec (coro_mortal);
659 Coro__State ctx = (Coro__State)arg; 884 coro_mortal = 0;
660
661 ctx->cursp = 0;
662 PL_op = PL_op->op_next;
663 CALLRUNOPS(aTHX);
664 /*NORETURN*/
665 abort ();
666}
667
668STATIC void
669transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
670{
671 dSP;
672 dSTACKLEVEL;
673
674 if (prev != next)
675 { 885 }
676 if (next->mainstack) 886}
887
888static int
889runops_trace (pTHX)
890{
891 COP *oldcop = 0;
892 int oldcxix = -2;
893 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
894 coro_cctx *cctx = coro->cctx;
895
896 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
897 {
898 PERL_ASYNC_CHECK ();
899
900 if (cctx->flags & CC_TRACE_ALL)
677 { 901 {
678 SAVE (prev, flags); 902 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
679 LOAD (next);
680
681 /* mark this state as in-use */
682 next->mainstack = 0;
683 next->tmps_ix = -2;
684
685 /* stacklevel changed? if yes, grab the stack for us! */
686 if (flags & TRANSFER_SAVE_CCTXT)
687 { 903 {
688 if (!prev->stack) 904 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
689 allocate_stack (prev, 0); 905 SV **bot, **top;
690 else if (prev->cursp != stacklevel 906 AV *av = newAV (); /* return values */
691 && prev->stack->usecnt > 1) 907 SV **cb;
908 dSP;
909
910 GV *gv = CvGV (cx->blk_sub.cv);
911 SV *fullname = sv_2mortal (newSV (0));
912 if (isGV (gv))
913 gv_efullname3 (fullname, gv, 0);
914
915 bot = PL_stack_base + cx->blk_oldsp + 1;
916 top = cx->blk_gimme == G_ARRAY ? SP + 1
917 : cx->blk_gimme == G_SCALAR ? bot + 1
918 : bot;
919
920 av_extend (av, top - bot);
921 while (bot < top)
922 av_push (av, SvREFCNT_inc_NN (*bot++));
923
924 PL_runops = RUNOPS_DEFAULT;
925 ENTER;
926 SAVETMPS;
927 EXTEND (SP, 3);
928 PUSHMARK (SP);
929 PUSHs (&PL_sv_no);
930 PUSHs (fullname);
931 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
932 PUTBACK;
933 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
934 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
935 SPAGAIN;
936 FREETMPS;
937 LEAVE;
938 PL_runops = runops_trace;
939 }
940
941 if (oldcop != PL_curcop)
942 {
943 oldcop = PL_curcop;
944
945 if (PL_curcop != &PL_compiling)
692 { 946 {
693 prev->gencnt = ++prev->stack->gencnt; 947 SV **cb;
694 prev->stack->usecnt = 1;
695 }
696 948
697 /* has our stack been invalidated? */ 949 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
698 if (next->stack && next->stack->gencnt != next->gencnt)
699 { 950 {
700 deallocate_stack (next); 951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
701 allocate_stack (next, 1); 952
702 coro_create (&(next->stack->cctx), 953 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
703 continue_coro, (void *)next, 954 {
704 next->stack->sptr, labs (next->stack->ssize)); 955 runops_proc_t old_runops = PL_runops;
956 dSP;
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 PL_runops = RUNOPS_DEFAULT;
964 ENTER;
965 SAVETMPS;
966 EXTEND (SP, 3);
967 PUSHMARK (SP);
968 PUSHs (&PL_sv_yes);
969 PUSHs (fullname);
970 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
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 oldcxix = cxstack_ix;
705 } 981 }
706 982
707 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 983 if (cctx->flags & CC_TRACE_LINE)
708 }
709
710 }
711 else if (next->tmps_ix == -2)
712 croak ("tried to transfer to running coroutine");
713 else
714 {
715 SAVE (prev, -1); /* first get rid of the old state */
716
717 if (flags & TRANSFER_SAVE_CCTXT)
718 {
719 if (!prev->stack)
720 allocate_stack (prev, 0);
721
722 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
723 { 984 {
724 setup_coro (next); 985 dSP;
725 986
726 prev->stack->refcnt++; 987 PL_runops = RUNOPS_DEFAULT;
727 prev->stack->usecnt++; 988 ENTER;
728 next->stack = prev->stack; 989 SAVETMPS;
729 next->gencnt = prev->gencnt; 990 EXTEND (SP, 3);
991 PL_runops = RUNOPS_DEFAULT;
992 PUSHMARK (SP);
993 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
994 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
730 } 1002 }
731 else
732 {
733 allocate_stack (next, 1);
734 coro_create (&(next->stack->cctx),
735 setup_coro, (void *)next,
736 next->stack->sptr, labs (next->stack->ssize));
737 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738 } 1003 }
739 } 1004 }
740 else
741 setup_coro (next);
742 } 1005 }
743 } 1006 }
744 1007
745 next->cursp = stacklevel; 1008 TAINT_NOT;
1009 return 0;
746} 1010}
747 1011
1012/* inject a fake call to Coro::State::_cctx_init into the execution */
1013/* _cctx_init should be careful, as it could be called at almost any time */
1014/* during execution of a perl program */
1015static void NOINLINE
1016cctx_prepare (pTHX_ coro_cctx *cctx)
1017{
1018 dSP;
1019 LOGOP myop;
1020
1021 PL_top_env = &PL_start_env;
1022
1023 if (cctx->flags & CC_TRACE)
1024 PL_runops = runops_trace;
1025
1026 Zero (&myop, 1, LOGOP);
1027 myop.op_next = PL_op;
1028 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1029
1030 PUSHMARK (SP);
1031 EXTEND (SP, 2);
1032 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1033 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1034 PUTBACK;
1035 PL_op = (OP *)&myop;
1036 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1037 SPAGAIN;
1038}
1039
1040/*
1041 * this is a _very_ stripped down perl interpreter ;)
1042 */
1043static void
1044cctx_run (void *arg)
1045{
1046 dTHX;
1047
1048 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1049 UNLOCK;
1050
1051 /* we now skip the entersub that lead to transfer() */
1052 PL_op = PL_op->op_next;
1053
1054 /* inject a fake subroutine call to cctx_init */
1055 cctx_prepare (aTHX_ (coro_cctx *)arg);
1056
1057 /* somebody or something will hit me for both perl_run and PL_restartop */
1058 PL_restartop = PL_op;
1059 perl_run (PL_curinterp);
1060
1061 /*
1062 * If perl-run returns we assume exit() was being called or the coro
1063 * fell off the end, which seems to be the only valid (non-bug)
1064 * reason for perl_run to return. We try to exit by jumping to the
1065 * bootstrap-time "top" top_env, as we cannot restore the "main"
1066 * coroutine as Coro has no such concept
1067 */
1068 PL_top_env = main_top_env;
1069 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1070}
1071
1072static coro_cctx *
1073cctx_new ()
1074{
1075 coro_cctx *cctx;
1076 void *stack_start;
1077 size_t stack_size;
1078
1079 ++cctx_count;
1080
1081 Newz (0, cctx, 1, coro_cctx);
1082
1083#if HAVE_MMAP
1084 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1085 /* mmap supposedly does allocate-on-write for us */
1086 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1087
1088 if (cctx->sptr != (void *)-1)
1089 {
1090# if CORO_STACKGUARD
1091 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1092# endif
1093 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1094 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1095 cctx->flags |= CC_MAPPED;
1096 }
1097 else
1098#endif
1099 {
1100 cctx->ssize = coro_stacksize * (long)sizeof (long);
1101 New (0, cctx->sptr, coro_stacksize, long);
1102
1103 if (!cctx->sptr)
1104 {
1105 perror ("FATAL: unable to allocate stack for coroutine");
1106 _exit (EXIT_FAILURE);
1107 }
1108
1109 stack_start = cctx->sptr;
1110 stack_size = cctx->ssize;
1111 }
1112
1113 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1114 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1115
1116 return cctx;
1117}
1118
1119static void
1120cctx_destroy (coro_cctx *cctx)
1121{
1122 if (!cctx)
1123 return;
1124
1125 --cctx_count;
1126
1127#if CORO_USE_VALGRIND
1128 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1129#endif
1130
1131#if HAVE_MMAP
1132 if (cctx->flags & CC_MAPPED)
1133 munmap (cctx->sptr, cctx->ssize);
1134 else
1135#endif
1136 Safefree (cctx->sptr);
1137
1138 Safefree (cctx);
1139}
1140
1141/* wether this cctx should be destructed */
1142#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1143
1144static coro_cctx *
1145cctx_get (pTHX)
1146{
1147 while (expect_true (cctx_first))
1148 {
1149 coro_cctx *cctx = cctx_first;
1150 cctx_first = cctx->next;
1151 --cctx_idle;
1152
1153 if (expect_true (!CCTX_EXPIRED (cctx)))
1154 return cctx;
1155
1156 cctx_destroy (cctx);
1157 }
1158
1159 return cctx_new ();
1160}
1161
1162static void
1163cctx_put (coro_cctx *cctx)
1164{
1165 /* free another cctx if overlimit */
1166 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1167 {
1168 coro_cctx *first = cctx_first;
1169 cctx_first = first->next;
1170 --cctx_idle;
1171
1172 cctx_destroy (first);
1173 }
1174
1175 ++cctx_idle;
1176 cctx->next = cctx_first;
1177 cctx_first = cctx;
1178}
1179
1180/** coroutine switching *****************************************************/
1181
1182static void
1183transfer_check (pTHX_ struct coro *prev, struct coro *next)
1184{
1185 if (expect_true (prev != next))
1186 {
1187 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1188 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1189
1190 if (expect_false (next->flags & CF_RUNNING))
1191 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1192
1193 if (expect_false (next->flags & CF_DESTROYED))
1194 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1195
1196#if !PERL_VERSION_ATLEAST (5,10,0)
1197 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1198 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1199#endif
1200 }
1201}
1202
1203/* always use the TRANSFER macro */
1204static void NOINLINE
1205transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1206{
1207 dSTACKLEVEL;
1208 static volatile int has_throw;
1209
1210 /* sometimes transfer is only called to set idle_sp */
1211 if (expect_false (!next))
1212 {
1213 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1214 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1215 }
1216 else if (expect_true (prev != next))
1217 {
1218 coro_cctx *prev__cctx;
1219
1220 if (expect_false (prev->flags & CF_NEW))
1221 {
1222 /* create a new empty context */
1223 Newz (0, prev->cctx, 1, coro_cctx);
1224 prev->flags &= ~CF_NEW;
1225 prev->flags |= CF_RUNNING;
1226 }
1227
1228 prev->flags &= ~CF_RUNNING;
1229 next->flags |= CF_RUNNING;
1230
1231 LOCK;
1232
1233 /* first get rid of the old state */
1234 save_perl (aTHX_ prev);
1235
1236 if (expect_false (next->flags & CF_NEW))
1237 {
1238 /* need to start coroutine */
1239 next->flags &= ~CF_NEW;
1240 /* setup coroutine call */
1241 coro_setup (aTHX_ next);
1242 }
1243 else
1244 load_perl (aTHX_ next);
1245
1246 prev__cctx = prev->cctx;
1247
1248 /* possibly "free" the cctx */
1249 if (expect_true (
1250 prev__cctx->idle_sp == STACKLEVEL
1251 && !(prev__cctx->flags & CC_TRACE)
1252 && !force_cctx
1253 ))
1254 {
1255 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1256 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1257
1258 prev->cctx = 0;
1259
1260 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1261 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1262 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1263 if (!next->cctx)
1264 next->cctx = cctx_get (aTHX);
1265
1266 cctx_put (prev__cctx);
1267 }
1268
1269 ++next->usecount;
1270
1271 if (expect_true (!next->cctx))
1272 next->cctx = cctx_get (aTHX);
1273
1274 has_throw = !!next->throw;
1275
1276 if (expect_false (prev__cctx != next->cctx))
1277 {
1278 prev__cctx->top_env = PL_top_env;
1279 PL_top_env = next->cctx->top_env;
1280 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1281 }
1282
1283 free_coro_mortal (aTHX);
1284 UNLOCK;
1285
1286 if (expect_false (has_throw))
1287 {
1288 struct coro *coro = SvSTATE (coro_current);
1289
1290 if (coro->throw)
1291 {
1292 SV *exception = coro->throw;
1293 coro->throw = 0;
1294 sv_setsv (ERRSV, exception);
1295 croak (0);
1296 }
1297 }
1298 }
1299}
1300
1301struct transfer_args
1302{
1303 struct coro *prev, *next;
1304};
1305
1306#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1307#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308
1309/** high level stuff ********************************************************/
1310
1311static int
1312coro_state_destroy (pTHX_ struct coro *coro)
1313{
1314 if (coro->flags & CF_DESTROYED)
1315 return 0;
1316
1317 coro->flags |= CF_DESTROYED;
1318
1319 if (coro->flags & CF_READY)
1320 {
1321 /* reduce nready, as destroying a ready coro effectively unreadies it */
1322 /* alternative: look through all ready queues and remove the coro */
1323 LOCK;
1324 --coro_nready;
1325 UNLOCK;
1326 }
1327 else
1328 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1329
1330 if (coro->mainstack && coro->mainstack != main_mainstack)
1331 {
1332 struct coro temp;
1333
1334 if (coro->flags & CF_RUNNING)
1335 croak ("FATAL: tried to destroy currently running coroutine");
1336
1337 save_perl (aTHX_ &temp);
1338 load_perl (aTHX_ coro);
1339
1340 coro_destroy (aTHX_ coro);
1341
1342 load_perl (aTHX_ &temp);
1343
1344 coro->slot = 0;
1345 }
1346
1347 cctx_destroy (coro->cctx);
1348 SvREFCNT_dec (coro->args);
1349
1350 if (coro->next) coro->next->prev = coro->prev;
1351 if (coro->prev) coro->prev->next = coro->next;
1352 if (coro == coro_first) coro_first = coro->next;
1353
1354 return 1;
1355}
1356
1357static int
1358coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1359{
1360 struct coro *coro = (struct coro *)mg->mg_ptr;
1361 mg->mg_ptr = 0;
1362
1363 coro->hv = 0;
1364
1365 if (--coro->refcnt < 0)
1366 {
1367 coro_state_destroy (aTHX_ coro);
1368 Safefree (coro);
1369 }
1370
1371 return 0;
1372}
1373
1374static int
1375coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1376{
1377 struct coro *coro = (struct coro *)mg->mg_ptr;
1378
1379 ++coro->refcnt;
1380
1381 return 0;
1382}
1383
1384static MGVTBL coro_state_vtbl = {
1385 0, 0, 0, 0,
1386 coro_state_free,
1387 0,
1388#ifdef MGf_DUP
1389 coro_state_dup,
1390#else
1391# define MGf_DUP 0
1392#endif
1393};
1394
1395static void
1396prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1397{
1398 ta->prev = SvSTATE (prev_sv);
1399 ta->next = SvSTATE (next_sv);
1400 TRANSFER_CHECK (*ta);
1401}
1402
1403static void
1404api_transfer (SV *prev_sv, SV *next_sv)
1405{
1406 dTHX;
1407 struct transfer_args ta;
1408
1409 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1410 TRANSFER (ta, 1);
1411}
1412
1413/** Coro ********************************************************************/
1414
1415static void
1416coro_enq (pTHX_ SV *coro_sv)
1417{
1418 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1419}
1420
1421static SV *
1422coro_deq (pTHX)
1423{
1424 int prio;
1425
1426 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1427 if (AvFILLp (coro_ready [prio]) >= 0)
1428 return av_shift (coro_ready [prio]);
1429
1430 return 0;
1431}
1432
1433static int
1434api_ready (SV *coro_sv)
1435{
1436 dTHX;
1437 struct coro *coro;
1438 SV *sv_hook;
1439 void (*xs_hook)(void);
1440
1441 if (SvROK (coro_sv))
1442 coro_sv = SvRV (coro_sv);
1443
1444 coro = SvSTATE (coro_sv);
1445
1446 if (coro->flags & CF_READY)
1447 return 0;
1448
1449 coro->flags |= CF_READY;
1450
1451 LOCK;
1452
1453 sv_hook = coro_nready ? 0 : coro_readyhook;
1454 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1455
1456 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1457 ++coro_nready;
1458
1459 UNLOCK;
1460
1461 if (sv_hook)
1462 {
1463 dSP;
1464
1465 ENTER;
1466 SAVETMPS;
1467
1468 PUSHMARK (SP);
1469 PUTBACK;
1470 call_sv (sv_hook, G_DISCARD);
1471 SPAGAIN;
1472
1473 FREETMPS;
1474 LEAVE;
1475 }
1476
1477 if (xs_hook)
1478 xs_hook ();
1479
1480 return 1;
1481}
1482
1483static int
1484api_is_ready (SV *coro_sv)
1485{
1486 dTHX;
1487 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488}
1489
1490static void
1491prepare_schedule (pTHX_ struct transfer_args *ta)
1492{
1493 SV *prev_sv, *next_sv;
1494
1495 for (;;)
1496 {
1497 LOCK;
1498 next_sv = coro_deq (aTHX);
1499
1500 /* nothing to schedule: call the idle handler */
1501 if (expect_false (!next_sv))
1502 {
1503 dSP;
1504 UNLOCK;
1505
1506 ENTER;
1507 SAVETMPS;
1508
1509 PUSHMARK (SP);
1510 PUTBACK;
1511 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1512 SPAGAIN;
1513
1514 FREETMPS;
1515 LEAVE;
1516 continue;
1517 }
1518
1519 ta->next = SvSTATE (next_sv);
1520
1521 /* cannot transfer to destroyed coros, skip and look for next */
1522 if (expect_false (ta->next->flags & CF_DESTROYED))
1523 {
1524 UNLOCK;
1525 SvREFCNT_dec (next_sv);
1526 /* coro_nready is already taken care of by destroy */
1527 continue;
1528 }
1529
1530 --coro_nready;
1531 UNLOCK;
1532 break;
1533 }
1534
1535 /* free this only after the transfer */
1536 prev_sv = SvRV (coro_current);
1537 ta->prev = SvSTATE (prev_sv);
1538 TRANSFER_CHECK (*ta);
1539 assert (ta->next->flags & CF_READY);
1540 ta->next->flags &= ~CF_READY;
1541 SvRV_set (coro_current, next_sv);
1542
1543 LOCK;
1544 free_coro_mortal (aTHX);
1545 coro_mortal = prev_sv;
1546 UNLOCK;
1547}
1548
1549static void
1550prepare_cede (pTHX_ struct transfer_args *ta)
1551{
1552 api_ready (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554}
1555
1556static int
1557prepare_cede_notself (pTHX_ struct transfer_args *ta)
1558{
1559 if (coro_nready)
1560 {
1561 SV *prev = SvRV (coro_current);
1562 prepare_schedule (aTHX_ ta);
1563 api_ready (prev);
1564 return 1;
1565 }
1566 else
1567 return 0;
1568}
1569
1570static void
1571api_schedule (void)
1572{
1573 dTHX;
1574 struct transfer_args ta;
1575
1576 prepare_schedule (aTHX_ &ta);
1577 TRANSFER (ta, 1);
1578}
1579
1580static int
1581api_cede (void)
1582{
1583 dTHX;
1584 struct transfer_args ta;
1585
1586 prepare_cede (aTHX_ &ta);
1587
1588 if (expect_true (ta.prev != ta.next))
1589 {
1590 TRANSFER (ta, 1);
1591 return 1;
1592 }
1593 else
1594 return 0;
1595}
1596
1597static int
1598api_cede_notself (void)
1599{
1600 dTHX;
1601 struct transfer_args ta;
1602
1603 if (prepare_cede_notself (aTHX_ &ta))
1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1610}
1611
1612static void
1613api_trace (SV *coro_sv, int flags)
1614{
1615 dTHX;
1616 struct coro *coro = SvSTATE (coro_sv);
1617
1618 if (flags & CC_TRACE)
1619 {
1620 if (!coro->cctx)
1621 coro->cctx = cctx_new ();
1622 else if (!(coro->cctx->flags & CC_TRACE))
1623 croak ("cannot enable tracing on coroutine with custom stack");
1624
1625 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1626 }
1627 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628 {
1629 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1630
1631 if (coro->flags & CF_RUNNING)
1632 PL_runops = RUNOPS_DEFAULT;
1633 else
1634 coro->slot->runops = RUNOPS_DEFAULT;
1635 }
1636}
1637
1638static int
1639coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1640{
1641 AV *padlist;
1642 AV *av = (AV *)mg->mg_obj;
1643
1644 abort ();
1645
1646 return 0;
1647}
1648
1649static MGVTBL coro_gensub_vtbl = {
1650 0, 0, 0, 0,
1651 coro_gensub_free
1652};
1653
1654/*****************************************************************************/
1655/* PerlIO::cede */
1656
1657typedef struct
1658{
1659 PerlIOBuf base;
1660 NV next, every;
1661} PerlIOCede;
1662
1663static IV
1664PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1665{
1666 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1667
1668 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1669 self->next = nvtime () + self->every;
1670
1671 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1672}
1673
1674static SV *
1675PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1676{
1677 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1678
1679 return newSVnv (self->every);
1680}
1681
1682static IV
1683PerlIOCede_flush (pTHX_ PerlIO *f)
1684{
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686 double now = nvtime ();
1687
1688 if (now >= self->next)
1689 {
1690 api_cede ();
1691 self->next = now + self->every;
1692 }
1693
1694 return PerlIOBuf_flush (aTHX_ f);
1695}
1696
1697static PerlIO_funcs PerlIO_cede =
1698{
1699 sizeof(PerlIO_funcs),
1700 "cede",
1701 sizeof(PerlIOCede),
1702 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1703 PerlIOCede_pushed,
1704 PerlIOBuf_popped,
1705 PerlIOBuf_open,
1706 PerlIOBase_binmode,
1707 PerlIOCede_getarg,
1708 PerlIOBase_fileno,
1709 PerlIOBuf_dup,
1710 PerlIOBuf_read,
1711 PerlIOBuf_unread,
1712 PerlIOBuf_write,
1713 PerlIOBuf_seek,
1714 PerlIOBuf_tell,
1715 PerlIOBuf_close,
1716 PerlIOCede_flush,
1717 PerlIOBuf_fill,
1718 PerlIOBase_eof,
1719 PerlIOBase_error,
1720 PerlIOBase_clearerr,
1721 PerlIOBase_setlinebuf,
1722 PerlIOBuf_get_base,
1723 PerlIOBuf_bufsiz,
1724 PerlIOBuf_get_ptr,
1725 PerlIOBuf_get_cnt,
1726 PerlIOBuf_set_ptrcnt,
1727};
1728
1729
748MODULE = Coro::State PACKAGE = Coro::State 1730MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749 1731
750PROTOTYPES: ENABLE 1732PROTOTYPES: DISABLE
751 1733
752BOOT: 1734BOOT:
753{ /* {} necessary for stoopid perl-5.6.x */ 1735{
754 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1736#ifdef USE_ITHREADS
755 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1737 MUTEX_INIT (&coro_mutex);
1738#endif
1739 BOOT_PAGESIZE;
1740
1741 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1742 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1743
1744 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1745 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1746 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1747
1748 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1749 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1750 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1751
756 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1752 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757 1753
758 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1756 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1757 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763 if (!padlist_cache)
764 padlist_cache = newHV ();
765 1758
766 main_mainstack = PL_mainstack; 1759 main_mainstack = PL_mainstack;
767} 1760 main_top_env = PL_top_env;
768 1761
769Coro::State 1762 while (main_top_env->je_prev)
770_newprocess(args) 1763 main_top_env = main_top_env->je_prev;
771 SV * args 1764
772 PROTOTYPE: $ 1765 coroapi.ver = CORO_API_VERSION;
1766 coroapi.rev = CORO_API_REVISION;
1767 coroapi.transfer = api_transfer;
1768
1769 {
1770 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1771
1772 if (!svp) croak ("Time::HiRes is required");
1773 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1774
1775 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1776 }
1777
1778 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1779}
1780
1781SV *
1782new (char *klass, ...)
773 CODE: 1783 CODE:
774 Coro__State coro; 1784{
1785 struct coro *coro;
1786 MAGIC *mg;
1787 HV *hv;
1788 int i;
775 1789
776 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
777 croak ("Coro::State::_newprocess expects an arrayref");
778
779 New (0, coro, 1, struct coro); 1790 Newz (0, coro, 1, struct coro);
1791 coro->args = newAV ();
1792 coro->flags = CF_NEW;
780 1793
781 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1794 if (coro_first) coro_first->prev = coro;
782 coro->mainstack = 0; /* actual work is done inside transfer */ 1795 coro->next = coro_first;
783 coro->stack = 0; 1796 coro_first = coro;
784 1797
785 RETVAL = coro; 1798 coro->hv = hv = newHV ();
1799 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1800 mg->mg_flags |= MGf_DUP;
1801 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1802
1803 av_extend (coro->args, items - 1);
1804 for (i = 1; i < items; i++)
1805 av_push (coro->args, newSVsv (ST (i)));
1806}
786 OUTPUT: 1807 OUTPUT:
787 RETVAL 1808 RETVAL
788 1809
1810# these not obviously related functions are all rolled into the same xs
1811# function to increase chances that they all will call transfer with the same
1812# stack offset
789void 1813void
790transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1814_set_stacklevel (...)
791 Coro::State_or_hashref prev 1815 ALIAS:
792 Coro::State_or_hashref next 1816 Coro::State::transfer = 1
793 int flags 1817 Coro::schedule = 2
794 PROTOTYPE: @ 1818 Coro::cede = 3
1819 Coro::cede_notself = 4
795 CODE: 1820 CODE:
796 transfer (aTHX_ prev, next, flags); 1821{
1822 struct transfer_args ta;
1823
1824 PUTBACK;
1825 switch (ix)
1826 {
1827 case 0:
1828 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1829 ta.next = 0;
1830 break;
1831
1832 case 1:
1833 if (items != 2)
1834 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1835
1836 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1837 break;
1838
1839 case 2:
1840 prepare_schedule (aTHX_ &ta);
1841 break;
1842
1843 case 3:
1844 prepare_cede (aTHX_ &ta);
1845 break;
1846
1847 case 4:
1848 if (!prepare_cede_notself (aTHX_ &ta))
1849 XSRETURN_EMPTY;
1850
1851 break;
1852 }
1853 SPAGAIN;
1854
1855 BARRIER;
1856 PUTBACK;
1857 TRANSFER (ta, 0);
1858 SPAGAIN; /* might be the sp of a different coroutine now */
1859 /* be extra careful not to ever do anything after TRANSFER */
1860}
1861
1862bool
1863_destroy (SV *coro_sv)
1864 CODE:
1865 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1866 OUTPUT:
1867 RETVAL
797 1868
798void 1869void
799DESTROY(coro) 1870_exit (int code)
800 Coro::State coro 1871 PROTOTYPE: $
801 CODE: 1872 CODE:
1873 _exit (code);
802 1874
803 if (coro->mainstack && coro->mainstack != main_mainstack) 1875int
1876cctx_stacksize (int new_stacksize = 0)
1877 CODE:
1878 RETVAL = coro_stacksize;
1879 if (new_stacksize)
1880 coro_stacksize = new_stacksize;
1881 OUTPUT:
1882 RETVAL
1883
1884int
1885cctx_count ()
1886 CODE:
1887 RETVAL = cctx_count;
1888 OUTPUT:
1889 RETVAL
1890
1891int
1892cctx_idle ()
1893 CODE:
1894 RETVAL = cctx_idle;
1895 OUTPUT:
1896 RETVAL
1897
1898void
1899list ()
1900 PPCODE:
1901{
1902 struct coro *coro;
1903 for (coro = coro_first; coro; coro = coro->next)
1904 if (coro->hv)
1905 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1906}
1907
1908void
1909call (Coro::State coro, SV *coderef)
1910 ALIAS:
1911 eval = 1
1912 CODE:
1913{
1914 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
804 { 1915 {
805 struct coro temp; 1916 struct coro temp;
806 1917
807 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1918 if (!(coro->flags & CF_RUNNING))
808 LOAD(aTHX_ coro); 1919 {
1920 PUTBACK;
1921 save_perl (aTHX_ &temp);
1922 load_perl (aTHX_ coro);
1923 }
809 1924
810 destroy_stacks (aTHX); 1925 {
1926 dSP;
1927 ENTER;
1928 SAVETMPS;
1929 PUTBACK;
1930 PUSHSTACK;
1931 PUSHMARK (SP);
811 1932
812 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1933 if (ix)
1934 eval_sv (coderef, 0);
1935 else
1936 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813 1937
814 coro->mainstack = 0; 1938 POPSTACK;
1939 SPAGAIN;
1940 FREETMPS;
1941 LEAVE;
1942 PUTBACK;
1943 }
1944
1945 if (!(coro->flags & CF_RUNNING))
1946 {
1947 save_perl (aTHX_ coro);
1948 load_perl (aTHX_ &temp);
1949 SPAGAIN;
1950 }
815 } 1951 }
1952}
816 1953
817 deallocate_stack (coro); 1954SV *
818 1955is_ready (Coro::State coro)
819 Safefree (coro); 1956 PROTOTYPE: $
1957 ALIAS:
1958 is_ready = CF_READY
1959 is_running = CF_RUNNING
1960 is_new = CF_NEW
1961 is_destroyed = CF_DESTROYED
1962 CODE:
1963 RETVAL = boolSV (coro->flags & ix);
1964 OUTPUT:
1965 RETVAL
820 1966
821void 1967void
822flush() 1968api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1969
1970SV *
1971has_cctx (Coro::State coro)
1972 PROTOTYPE: $
823 CODE: 1973 CODE:
824#ifdef MAY_FLUSH 1974 RETVAL = boolSV (!!coro->cctx);
825 flush_padlist_cache (); 1975 OUTPUT:
826#endif 1976 RETVAL
827 1977
828MODULE = Coro::State PACKAGE = Coro::Cont 1978int
1979is_traced (Coro::State coro)
1980 PROTOTYPE: $
1981 CODE:
1982 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983 OUTPUT:
1984 RETVAL
829 1985
830# this is slightly dirty 1986IV
1987rss (Coro::State coro)
1988 PROTOTYPE: $
1989 ALIAS:
1990 usecount = 1
1991 CODE:
1992 switch (ix)
1993 {
1994 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1995 case 1: RETVAL = coro->usecount; break;
1996 }
1997 OUTPUT:
1998 RETVAL
831 1999
832void 2000void
833yield(...) 2001force_cctx ()
2002 CODE:
2003 struct coro *coro = SvSTATE (coro_current);
2004 coro->cctx->idle_sp = 0;
2005
2006void
2007throw (Coro::State self, SV *throw = &PL_sv_undef)
2008 PROTOTYPE: $;$
2009 CODE:
2010 SvREFCNT_dec (self->throw);
2011 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2012
2013void
2014swap_defsv (Coro::State self)
2015 PROTOTYPE: $
2016 ALIAS:
2017 swap_defav = 1
2018 CODE:
2019 if (!self->slot)
2020 croak ("cannot swap state with coroutine that has no saved state");
2021 else
2022 {
2023 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2025
2026 SV *tmp = *src; *src = *dst; *dst = tmp;
2027 }
2028
2029MODULE = Coro::State PACKAGE = Coro
2030
2031BOOT:
2032{
2033 int i;
2034
2035 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2036 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2037 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2038
2039 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2040 SvREADONLY_on (coro_current);
2041
2042 coro_stash = gv_stashpv ("Coro", TRUE);
2043
2044 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2045 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2046 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2047 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2048 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2049 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2050
2051 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2052 coro_ready[i] = newAV ();
2053
2054 {
2055 SV *sv = perl_get_sv ("Coro::API", TRUE);
2056 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2057
2058 coroapi.schedule = api_schedule;
2059 coroapi.cede = api_cede;
2060 coroapi.cede_notself = api_cede_notself;
2061 coroapi.ready = api_ready;
2062 coroapi.is_ready = api_is_ready;
2063 coroapi.nready = &coro_nready;
2064 coroapi.current = coro_current;
2065
2066 GCoroAPI = &coroapi;
2067 sv_setiv (sv, (IV)&coroapi);
2068 SvREADONLY_on (sv);
2069 }
2070}
2071
2072void
2073_set_current (SV *current)
2074 PROTOTYPE: $
2075 CODE:
2076 SvREFCNT_dec (SvRV (coro_current));
2077 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2078
2079void
2080_set_readyhook (SV *hook)
2081 PROTOTYPE: $
2082 CODE:
2083 LOCK;
2084 SvREFCNT_dec (coro_readyhook);
2085 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2086 UNLOCK;
2087
2088int
2089prio (Coro::State coro, int newprio = 0)
2090 ALIAS:
2091 nice = 1
2092 CODE:
2093{
2094 RETVAL = coro->prio;
2095
2096 if (items > 1)
2097 {
2098 if (ix)
2099 newprio = coro->prio - newprio;
2100
2101 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2102 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2103
2104 coro->prio = newprio;
2105 }
2106}
2107 OUTPUT:
2108 RETVAL
2109
2110SV *
2111ready (SV *self)
2112 PROTOTYPE: $
2113 CODE:
2114 RETVAL = boolSV (api_ready (self));
2115 OUTPUT:
2116 RETVAL
2117
2118int
2119nready (...)
2120 PROTOTYPE:
2121 CODE:
2122 RETVAL = coro_nready;
2123 OUTPUT:
2124 RETVAL
2125
2126# for async_pool speedup
2127void
2128_pool_1 (SV *cb)
2129 CODE:
2130{
2131 struct coro *coro = SvSTATE (coro_current);
2132 HV *hv = (HV *)SvRV (coro_current);
2133 AV *defav = GvAV (PL_defgv);
2134 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2135 AV *invoke_av;
2136 int i, len;
2137
2138 if (!invoke)
2139 {
2140 SV *old = PL_diehook;
2141 PL_diehook = 0;
2142 SvREFCNT_dec (old);
2143 croak ("\3async_pool terminate\2\n");
2144 }
2145
2146 SvREFCNT_dec (coro->saved_deffh);
2147 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2148
2149 hv_store (hv, "desc", sizeof ("desc") - 1,
2150 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2151
2152 invoke_av = (AV *)SvRV (invoke);
2153 len = av_len (invoke_av);
2154
2155 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2156
2157 if (len > 0)
2158 {
2159 av_fill (defav, len - 1);
2160 for (i = 0; i < len; ++i)
2161 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2162 }
2163
2164 SvREFCNT_dec (invoke);
2165}
2166
2167void
2168_pool_2 (SV *cb)
2169 CODE:
2170{
2171 struct coro *coro = SvSTATE (coro_current);
2172
2173 sv_setsv (cb, &PL_sv_undef);
2174
2175 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2176 coro->saved_deffh = 0;
2177
2178 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2179 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180 {
2181 SV *old = PL_diehook;
2182 PL_diehook = 0;
2183 SvREFCNT_dec (old);
2184 croak ("\3async_pool terminate\2\n");
2185 }
2186
2187 av_clear (GvAV (PL_defgv));
2188 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2189 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190
2191 coro->prio = 0;
2192
2193 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194 api_trace (coro_current, 0);
2195
2196 av_push (av_async_pool, newSVsv (coro_current));
2197}
2198
2199#if 0
2200
2201void
2202_generator_call (...)
834 PROTOTYPE: @ 2203 PROTOTYPE: @
2204 PPCODE:
2205 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206 xxxx
2207 abort ();
2208
2209SV *
2210gensub (SV *sub, ...)
2211 PROTOTYPE: &;@
835 CODE: 2212 CODE:
836 static SV *returnstk; 2213{
2214 struct coro *coro;
2215 MAGIC *mg;
837 SV *sv; 2216 CV *xcv;
2217 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2218 int i;
2219
2220 CvGV (ncv) = CvGV (cv);
2221 CvFILE (ncv) = CvFILE (cv);
2222
2223 Newz (0, coro, 1, struct coro);
2224 coro->args = newAV ();
2225 coro->flags = CF_NEW;
2226
2227 av_extend (coro->args, items - 1);
2228 for (i = 1; i < items; i++)
2229 av_push (coro->args, newSVsv (ST (i)));
2230
2231 CvISXSUB_on (ncv);
2232 CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236 CvXSUB (ncv) = CvXSUB (xcv);
2237 CvANON_on (ncv);
2238
2239 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2240 RETVAL = newRV_noinc ((SV *)ncv);
2241}
2242 OUTPUT:
2243 RETVAL
2244
2245#endif
2246
2247
2248MODULE = Coro::State PACKAGE = Coro::AIO
2249
2250void
2251_get_state (SV *self)
2252 PPCODE:
2253{
838 AV *defav = GvAV (PL_defgv); 2254 AV *defav = GvAV (PL_defgv);
839 struct coro *prev, *next; 2255 AV *av = newAV ();
2256 int i;
2257 SV *data_sv = newSV (sizeof (struct io_state));
2258 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2259 SvCUR_set (data_sv, sizeof (struct io_state));
2260 SvPOK_only (data_sv);
840 2261
841 if (!returnstk) 2262 data->errorno = errno;
842 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2263 data->laststype = PL_laststype;
2264 data->laststatval = PL_laststatval;
2265 data->statcache = PL_statcache;
843 2266
844 /* set up @_ -- ugly */ 2267 av_extend (av, AvFILLp (defav) + 1 + 1);
845 av_clear (defav);
846 av_fill (defav, items - 1);
847 while (items--)
848 av_store (defav, items, SvREFCNT_inc (ST(items)));
849 2268
850 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2269 for (i = 0; i <= AvFILLp (defav); ++i)
851 sv = av_pop ((AV *)SvRV (returnstk)); 2270 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
852 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
853 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
854 SvREFCNT_dec (sv);
855 2271
856 transfer(aTHX_ prev, next, 0); 2272 av_push (av, data_sv);
857 2273
2274 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2275
2276 api_ready (self);
2277}
2278
2279void
2280_set_state (SV *state)
2281 PROTOTYPE: $
2282 PPCODE:
2283{
2284 AV *av = (AV *)SvRV (state);
2285 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2286 int i;
2287
2288 errno = data->errorno;
2289 PL_laststype = data->laststype;
2290 PL_laststatval = data->laststatval;
2291 PL_statcache = data->statcache;
2292
2293 EXTEND (SP, AvFILLp (av));
2294 for (i = 0; i < AvFILLp (av); ++i)
2295 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2296}
2297
2298
2299MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300
2301BOOT:
2302 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303
2304SV *
2305_schedule (...)
2306 PROTOTYPE: @
2307 CODE:
2308{
2309 static int incede;
2310
2311 api_cede_notself ();
2312
2313 ++incede;
2314 while (coro_nready >= incede && api_cede ())
2315 ;
2316
2317 sv_setsv (sv_activity, &PL_sv_undef);
2318 if (coro_nready >= incede)
2319 {
2320 PUSHMARK (SP);
2321 PUTBACK;
2322 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2323 SPAGAIN;
2324 }
2325
2326 --incede;
2327}
2328
2329
2330MODULE = Coro::State PACKAGE = PerlIO::cede
2331
2332BOOT:
2333 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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