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Comparing Coro/Coro/State.xs (file contents):
Revision 1.12 by root, Sun Jul 22 03:24:10 2001 UTC vs.
Revision 1.247 by root, Wed Sep 24 21:31:29 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#if 1 11#include "patchlevel.h"
6# define CHK(x) (void *)0 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
7#else 22#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
9#endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
10 48
11#define MAY_FLUSH /* increases codesize */ 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
12 55
13#define SUB_INIT "Coro::State::initialize" 56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
14 58
15#define TRANSFER_SAVE_DEFAV 0x00000001 59#define PERL_VERSION_ATLEAST(a,b,c) \
16#define TRANSFER_SAVE_DEFSV 0x00000002 60 (PERL_REVISION > (a) \
17#define TRANSFER_SAVE_ERRSV 0x00000004 61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18 64
19#define TRANSFER_SAVE_ALL -1 65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
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
20 85
86/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */
100#ifndef SvRV_set
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
120#define STACKLEVEL ((void *)&stacklevel)
121
122#define IN_DESTRUCT (PL_main_cv == Nullcv)
123
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 int errorno;
154 I32 laststype;
155 int laststatval;
156 Stat_t statcache;
157};
158
159static double (*nvtime)(); /* so why doesn't it take void? */
160
161static size_t coro_stacksize = CORO_STACKSIZE;
162static struct CoroAPI coroapi;
163static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env;
165static HV *coro_state_stash, *coro_stash;
166static volatile SV *coro_mortal; /* will be freed after next transfer */
167
168static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook;
171static SV *rv_warnhook;
172static HV *hv_sig; /* %SIG */
173
174/* async_pool helper stuff */
175static SV *sv_pool_rss;
176static SV *sv_pool_size;
177static AV *av_async_pool;
178
179/* Coro::AnyEvent */
180static SV *sv_activity;
181
182static struct coro_cctx *cctx_first;
183static int cctx_count, cctx_idle;
184
185enum {
186 CC_MAPPED = 0x01,
187 CC_NOREUSE = 0x02, /* throw this away after tracing */
188 CC_TRACE = 0x04,
189 CC_TRACE_SUB = 0x08, /* trace sub calls */
190 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192};
193
194/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx {
196 struct coro_cctx *next;
197
198 /* the stack */
199 void *sptr;
200 size_t ssize;
201
202 /* cpu state */
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env;
206 coro_context cctx;
207
208#if CORO_USE_VALGRIND
209 int valgrind_id;
210#endif
211 unsigned char flags;
212} coro_cctx;
213
214enum {
215 CF_RUNNING = 0x0001, /* coroutine is running */
216 CF_READY = 0x0002, /* coroutine is ready */
217 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct {
223 SV *defsv;
224 AV *defav;
225 SV *errsv;
226 SV *irsgv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
231
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233
234/* this is a structure representing a perl-level coroutine */
21struct coro { 235struct coro {
22 /* optionally saved, might be zero */ 236 /* the c coroutine allocated to this perl coroutine, if any */
23 AV *defav; 237 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 238
30 /* the stacks and related info (callchain etc..) */ 239 /* process data */
31 PERL_SI *curstackinfo;
32 AV *curstack;
33 AV *mainstack; 240 AV *mainstack;
34 SV **stack_sp; 241 perl_slots *slot; /* basically the saved sp */
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 242
57 /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247
248 /* statistics */
249 int usecount; /* number of transfers to this coro */
250
251 /* coro process data */
252 int prio;
253 SV *throw; /* exception to be thrown */
254
255 /* async_pool */
256 SV *saved_deffh;
257
258 /* linked list */
259 struct coro *next, *prev;
59}; 260};
60 261
61typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
63 264
64static AV *main_mainstack; /* used to differentiate between $main and others */ 265/** Coro ********************************************************************/
65 266
66static HV *padlist_cache; 267#define PRIO_MAX 3
268#define PRIO_HIGH 1
269#define PRIO_NORMAL 0
270#define PRIO_LOW -1
271#define PRIO_IDLE -3
272#define PRIO_MIN -4
67 273
68/* mostly copied from op.c:cv_clone2 */ 274/* for Coro.pm */
69STATIC AV * 275static SV *coro_current;
70clone_padlist (AV *protopadlist) 276static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
278static int coro_nready;
279static struct coro *coro_first;
280
281/** lowlevel stuff **********************************************************/
282
283static SV *
284coro_get_sv (pTHX_ const char *name, int create)
71{ 285{
72 AV *av; 286#if PERL_VERSION_ATLEAST (5,10,0)
73 I32 ix; 287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
74 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 288 get_sv (name, create);
75 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 289#endif
76 SV **pname = AvARRAY (protopad_name); 290 return get_sv (name, create);
77 SV **ppad = AvARRAY (protopad); 291}
78 I32 fname = AvFILLp (protopad_name); 292
79 I32 fpad = AvFILLp (protopad); 293static AV *
294coro_get_av (pTHX_ const char *name, int create)
295{
296#if PERL_VERSION_ATLEAST (5,10,0)
297 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
298 get_av (name, create);
299#endif
300 return get_av (name, create);
301}
302
303static HV *
304coro_get_hv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_hv (name, create);
309#endif
310 return get_hv (name, create);
311}
312
313static AV *
314coro_clone_padlist (pTHX_ CV *cv)
315{
316 AV *padlist = CvPADLIST (cv);
80 AV *newpadlist, *newpad_name, *newpad; 317 AV *newpadlist, *newpad;
81 SV **npad;
82
83 newpad_name = newAV ();
84 for (ix = fname; ix >= 0; ix--)
85 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
86
87 newpad = newAV ();
88 av_fill (newpad, AvFILLp (protopad));
89 npad = AvARRAY (newpad);
90 318
91 newpadlist = newAV (); 319 newpadlist = newAV ();
92 AvREAL_off (newpadlist); 320 AvREAL_off (newpadlist);
93 av_store (newpadlist, 0, (SV *) newpad_name); 321#if PERL_VERSION_ATLEAST (5,10,0)
322 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
323#else
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist);
328
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
94 av_store (newpadlist, 1, (SV *) newpad); 330 av_store (newpadlist, 1, (SV *)newpad);
95 331
96 av = newAV (); /* will be @_ */ 332 return newpadlist;
97 av_extend (av, 0); 333}
98 av_store (newpad, 0, (SV *) av);
99 AvFLAGS (av) = AVf_REIFY;
100 334
101 for (ix = fpad; ix > 0; ix--) 335static void
336free_padlist (pTHX_ AV *padlist)
337{
338 /* may be during global destruction */
339 if (SvREFCNT (padlist))
102 { 340 {
103 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 341 I32 i = AvFILLp (padlist);
104 if (namesv && namesv != &PL_sv_undef) 342 while (i >= 0)
105 { 343 {
106 char *name = SvPVX (namesv); /* XXX */ 344 SV **svp = av_fetch (padlist, i--, FALSE);
107 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 345 if (svp)
108 { /* lexical from outside? */
109 npad[ix] = SvREFCNT_inc (ppad[ix]);
110 } 346 {
111 else
112 { /* our own lexical */
113 SV *sv; 347 SV *sv;
114 if (*name == '&') 348 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
115 sv = SvREFCNT_inc (ppad[ix]); 349 SvREFCNT_dec (sv);
116 else if (*name == '@') 350
117 sv = (SV *) newAV (); 351 SvREFCNT_dec (*svp);
118 else if (*name == '%')
119 sv = (SV *) newHV ();
120 else
121 sv = NEWSV (0, 0);
122 if (!SvPADBUSY (sv))
123 SvPADMY_on (sv);
124 npad[ix] = sv;
125 } 352 }
126 } 353 }
127 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
128 {
129 npad[ix] = SvREFCNT_inc (ppad[ix]);
130 }
131 else
132 {
133 SV *sv = NEWSV (0, 0);
134 SvPADTMP_on (sv);
135 npad[ix] = sv;
136 }
137 }
138 354
139#if 0 /* return -ENOTUNDERSTOOD */
140 /* Now that vars are all in place, clone nested closures. */
141
142 for (ix = fpad; ix > 0; ix--) {
143 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
144 if (namesv
145 && namesv != &PL_sv_undef
146 && !(SvFLAGS(namesv) & SVf_FAKE)
147 && *SvPVX(namesv) == '&'
148 && CvCLONE(ppad[ix]))
149 {
150 CV *kid = cv_clone((CV*)ppad[ix]);
151 SvREFCNT_dec(ppad[ix]);
152 CvCLONE_on(kid);
153 SvPADMY_on(kid);
154 npad[ix] = (SV*)kid;
155 }
156 }
157#endif
158
159 return newpadlist;
160}
161
162#ifdef MAY_FLUSH
163STATIC AV *
164free_padlist (AV *padlist)
165{
166 /* may be during global destruction */
167 if (SvREFCNT(padlist))
168 {
169 I32 i = AvFILLp(padlist);
170 while (i >= 0)
171 {
172 SV **svp = av_fetch(padlist, i--, FALSE);
173 SV *sv = svp ? *svp : Nullsv;
174 if (sv)
175 SvREFCNT_dec(sv);
176 }
177
178 SvREFCNT_dec((SV*)padlist); 355 SvREFCNT_dec ((SV*)padlist);
179 } 356 }
180} 357}
181#endif 358
359static int
360coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
361{
362 AV *padlist;
363 AV *av = (AV *)mg->mg_obj;
364
365 /* casting is fun. */
366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
367 free_padlist (aTHX_ padlist);
368
369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
370
371 return 0;
372}
373
374#define CORO_MAGIC_type_cv PERL_MAGIC_ext
375#define CORO_MAGIC_type_state PERL_MAGIC_ext
376
377static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0,
379 coro_cv_free
380};
381
382#define CORO_MAGIC(sv,type) \
383 SvMAGIC (sv) \
384 ? SvMAGIC (sv)->mg_type == type \
385 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \
387 : 0
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391
392static struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
182 417
183/* the next two functions merely cache the padlists */ 418/* the next two functions merely cache the padlists */
184STATIC void 419static void
185get_padlist (CV *cv) 420get_padlist (pTHX_ CV *cv)
186{ 421{
187 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
188 424
189 if (he && AvFILLp ((AV *)*he) >= 0) 425 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
190 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 426 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
191 else 427 else
192 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
193}
194
195STATIC void
196put_padlist (CV *cv)
197{
198 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
199
200 if (SvTYPE (*he) != SVt_PVAV)
201 { 428 {
429#if CORO_PREFER_PERL_FUNCTIONS
430 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */
432 CV *cp = Perl_cv_clone (cv);
433 CvPADLIST (cv) = CvPADLIST (cp);
434 CvPADLIST (cp) = 0;
202 SvREFCNT_dec (*he); 435 SvREFCNT_dec (cp);
203 *he = (SV *)newAV (); 436#else
437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
438#endif
204 } 439 }
205
206 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
207} 440}
208
209#ifdef MAY_FLUSH
210STATIC void
211flush_padlist_cache ()
212{
213 HV *hv = padlist_cache;
214 padlist_cache = newHV ();
215
216 if (hv_iterinit (hv))
217 {
218 HE *he;
219 AV *padlist;
220
221 while (!!(he = hv_iternext (hv)))
222 {
223 AV *av = (AV *)HeVAL(he);
224
225 /* casting is fun. */
226 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
227 free_padlist (padlist);
228 }
229 }
230
231 SvREFCNT_dec (hv);
232}
233#endif
234
235#define SB do {
236#define SE } while (0)
237
238#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
239#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
240
241#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
242 441
243static void 442static void
443put_padlist (pTHX_ CV *cv)
444{
445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
447
448 if (expect_false (!mg))
449 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
450
451 av = (AV *)mg->mg_obj;
452
453 if (expect_false (AvFILLp (av) >= AvMAX (av)))
454 av_extend (av, AvMAX (av) + 1);
455
456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
457}
458
459/** load & save, init *******************************************************/
460
461static void
244load_state(pTHX_ Coro__State c) 462load_perl (pTHX_ Coro__State c)
245{ 463{
246 PL_dowarn = c->dowarn; 464 perl_slots *slot = c->slot;
465 c->slot = 0;
247 466
248 PL_curstackinfo = c->curstackinfo;
249 PL_curstack = c->curstack;
250 PL_mainstack = c->mainstack; 467 PL_mainstack = c->mainstack;
251 PL_stack_sp = c->stack_sp;
252 PL_op = c->op;
253 PL_curpad = c->curpad;
254 PL_stack_base = c->stack_base;
255 PL_stack_max = c->stack_max;
256 PL_tmps_stack = c->tmps_stack;
257 PL_tmps_floor = c->tmps_floor;
258 PL_tmps_ix = c->tmps_ix;
259 PL_tmps_max = c->tmps_max;
260 PL_markstack = c->markstack;
261 PL_markstack_ptr = c->markstack_ptr;
262 PL_markstack_max = c->markstack_max;
263 PL_scopestack = c->scopestack;
264 PL_scopestack_ix = c->scopestack_ix;
265 PL_scopestack_max = c->scopestack_max;
266 PL_savestack = c->savestack;
267 PL_savestack_ix = c->savestack_ix;
268 PL_savestack_max = c->savestack_max;
269 PL_retstack = c->retstack;
270 PL_retstack_ix = c->retstack_ix;
271 PL_retstack_max = c->retstack_max;
272 PL_curcop = c->curcop;
273 468
274 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 469 GvSV (PL_defgv) = slot->defsv;
275 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 470 GvAV (PL_defgv) = slot->defav;
276 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 471 GvSV (PL_errgv) = slot->errsv;
472 GvSV (irsgv) = slot->irsgv;
473
474 #define VAR(name,type) PL_ ## name = slot->name;
475 # include "state.h"
476 #undef VAR
277 477
278 { 478 {
279 dSP; 479 dSP;
480
280 CV *cv; 481 CV *cv;
281 482
282 /* now do the ugly restore mess */ 483 /* now do the ugly restore mess */
283 while ((cv = (CV *)POPs)) 484 while (expect_true (cv = (CV *)POPs))
284 { 485 {
285 AV *padlist = (AV *)POPs;
286
287 if (padlist)
288 {
289 put_padlist (cv); /* mark this padlist as available */ 486 put_padlist (aTHX_ cv); /* mark this padlist as available */
290 CvPADLIST(cv) = padlist; 487 CvDEPTH (cv) = PTR2IV (POPs);
291#ifdef USE_THREADS 488 CvPADLIST (cv) = (AV *)POPs;
292 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
293#endif
294 }
295
296 ++CvDEPTH(cv);
297 } 489 }
298 490
299 PUTBACK; 491 PUTBACK;
300 } 492 }
301} 493}
302 494
303static void 495static void
304save_state(pTHX_ Coro__State c, int flags) 496save_perl (pTHX_ Coro__State c)
305{ 497{
306 { 498 {
307 dSP; 499 dSP;
308 I32 cxix = cxstack_ix; 500 I32 cxix = cxstack_ix;
309 PERL_CONTEXT *ccstk = cxstack; 501 PERL_CONTEXT *ccstk = cxstack;
… …
312 /* 504 /*
313 * the worst thing you can imagine happens first - we have to save 505 * the worst thing you can imagine happens first - we have to save
314 * (and reinitialize) all cv's in the whole callchain :( 506 * (and reinitialize) all cv's in the whole callchain :(
315 */ 507 */
316 508
317 PUSHs (Nullsv); 509 XPUSHs (Nullsv);
318 /* this loop was inspired by pp_caller */ 510 /* this loop was inspired by pp_caller */
319 for (;;) 511 for (;;)
320 { 512 {
321 do 513 while (expect_true (cxix >= 0))
322 { 514 {
323 PERL_CONTEXT *cx = &ccstk[cxix--]; 515 PERL_CONTEXT *cx = &ccstk[cxix--];
324 516
325 if (CxTYPE(cx) == CXt_SUB) 517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
326 { 518 {
327 CV *cv = cx->blk_sub.cv; 519 CV *cv = cx->blk_sub.cv;
520
328 if (CvDEPTH(cv)) 521 if (expect_true (CvDEPTH (cv)))
329 { 522 {
330#ifdef USE_THREADS
331 /*XPUSHs ((SV *)CvOWNER(cv));*/
332 /*CvOWNER(cv) = 0;*/
333 /*error must unlock this cv etc.. etc...*/
334#endif
335 EXTEND (SP, CvDEPTH(cv)*2); 523 EXTEND (SP, 3);
336
337 while (--CvDEPTH(cv))
338 {
339 /* this tells the restore code to increment CvDEPTH */
340 PUSHs (Nullsv);
341 PUSHs ((SV *)cv);
342 }
343
344 PUSHs ((SV *)CvPADLIST(cv)); 524 PUSHs ((SV *)CvPADLIST (cv));
525 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
345 PUSHs ((SV *)cv); 526 PUSHs ((SV *)cv);
346 527
347 get_padlist (cv); /* this is a monster */ 528 CvDEPTH (cv) = 0;
529 get_padlist (aTHX_ cv);
348 } 530 }
349 } 531 }
350 else if (CxTYPE(cx) == CXt_FORMAT) 532 }
533
534 if (expect_true (top_si->si_type == PERLSI_MAIN))
535 break;
536
537 top_si = top_si->si_prev;
538 ccstk = top_si->si_cxstack;
539 cxix = top_si->si_cxix;
540 }
541
542 PUTBACK;
543 }
544
545 /* allocate some space on the context stack for our purposes */
546 /* we manually unroll here, as usually 2 slots is enough */
547 if (SLOT_COUNT >= 1) CXINC;
548 if (SLOT_COUNT >= 2) CXINC;
549 if (SLOT_COUNT >= 3) CXINC;
550 {
551 int i;
552 for (i = 3; i < SLOT_COUNT; ++i)
553 CXINC;
554 }
555 cxstack_ix -= SLOT_COUNT; /* undo allocation */
556
557 c->mainstack = PL_mainstack;
558
559 {
560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
561
562 slot->defav = GvAV (PL_defgv);
563 slot->defsv = DEFSV;
564 slot->errsv = ERRSV;
565 slot->irsgv = GvSV (irsgv);
566
567 #define VAR(name,type) slot->name = PL_ ## name;
568 # include "state.h"
569 #undef VAR
570 }
571}
572
573/*
574 * allocate various perl stacks. This is an exact copy
575 * of perl.c:init_stacks, except that it uses less memory
576 * on the (sometimes correct) assumption that coroutines do
577 * not usually need a lot of stackspace.
578 */
579#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks
581#else
582static void
583coro_init_stacks (pTHX)
584{
585 PL_curstackinfo = new_stackinfo(32, 8);
586 PL_curstackinfo->si_type = PERLSI_MAIN;
587 PL_curstack = PL_curstackinfo->si_stack;
588 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
589
590 PL_stack_base = AvARRAY(PL_curstack);
591 PL_stack_sp = PL_stack_base;
592 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
593
594 New(50,PL_tmps_stack,32,SV*);
595 PL_tmps_floor = -1;
596 PL_tmps_ix = -1;
597 PL_tmps_max = 32;
598
599 New(54,PL_markstack,16,I32);
600 PL_markstack_ptr = PL_markstack;
601 PL_markstack_max = PL_markstack + 16;
602
603#ifdef SET_MARK_OFFSET
604 SET_MARK_OFFSET;
605#endif
606
607 New(54,PL_scopestack,8,I32);
608 PL_scopestack_ix = 0;
609 PL_scopestack_max = 8;
610
611 New(54,PL_savestack,24,ANY);
612 PL_savestack_ix = 0;
613 PL_savestack_max = 24;
614
615#if !PERL_VERSION_ATLEAST (5,10,0)
616 New(54,PL_retstack,4,OP*);
617 PL_retstack_ix = 0;
618 PL_retstack_max = 4;
619#endif
620}
621#endif
622
623/*
624 * destroy the stacks, the callchain etc...
625 */
626static void
627coro_destroy_stacks (pTHX)
628{
629 while (PL_curstackinfo->si_next)
630 PL_curstackinfo = PL_curstackinfo->si_next;
631
632 while (PL_curstackinfo)
633 {
634 PERL_SI *p = PL_curstackinfo->si_prev;
635
636 if (!IN_DESTRUCT)
637 SvREFCNT_dec (PL_curstackinfo->si_stack);
638
639 Safefree (PL_curstackinfo->si_cxstack);
640 Safefree (PL_curstackinfo);
641 PL_curstackinfo = p;
642 }
643
644 Safefree (PL_tmps_stack);
645 Safefree (PL_markstack);
646 Safefree (PL_scopestack);
647 Safefree (PL_savestack);
648#if !PERL_VERSION_ATLEAST (5,10,0)
649 Safefree (PL_retstack);
650#endif
651}
652
653static size_t
654coro_rss (pTHX_ struct coro *coro)
655{
656 size_t rss = sizeof (*coro);
657
658 if (coro->mainstack)
659 {
660 perl_slots tmp_slot;
661 perl_slots *slot;
662
663 if (coro->flags & CF_RUNNING)
664 {
665 slot = &tmp_slot;
666
667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR
670 }
671 else
672 slot = coro->slot;
673
674 if (slot)
675 {
676 rss += sizeof (slot->curstackinfo);
677 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
678 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
679 rss += slot->tmps_max * sizeof (SV *);
680 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
681 rss += slot->scopestack_max * sizeof (I32);
682 rss += slot->savestack_max * sizeof (ANY);
683
684#if !PERL_VERSION_ATLEAST (5,10,0)
685 rss += slot->retstack_max * sizeof (OP *);
686#endif
687 }
688 }
689
690 return rss;
691}
692
693/** coroutine stack handling ************************************************/
694
695static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
696static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
698
699/* apparently < 5.8.8 */
700#ifndef MgPV_nolen_const
701#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
702 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
703 (const char*)(mg)->mg_ptr)
704#endif
705
706/*
707 * This overrides the default magic get method of %SIG elements.
708 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
709 * and instead of tryign to save and restore the hash elements, we just provide
710 * readback here.
711 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
712 * not expecting this to actually change the hook. This is a potential problem
713 * when a schedule happens then, but we ignore this.
714 */
715static int
716coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
717{
718 const char *s = MgPV_nolen_const (mg);
719
720 if (*s == '_')
721 {
722 SV **svp = 0;
723
724 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
725 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
726
727 if (svp)
728 {
729 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
730 return 0;
731 }
732 }
733
734 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
735}
736
737static int
738coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
739{
740 const char *s = MgPV_nolen_const (mg);
741
742 if (*s == '_')
743 {
744 SV **svp = 0;
745
746 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
747 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
748
749 if (svp)
750 {
751 SV *old = *svp;
752 *svp = 0;
753 SvREFCNT_dec (old);
754 return 0;
755 }
756 }
757
758 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
759}
760
761static int
762coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
763{
764 const char *s = MgPV_nolen_const (mg);
765
766 if (*s == '_')
767 {
768 SV **svp = 0;
769
770 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
771 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
772
773 if (svp)
774 {
775 SV *old = *svp;
776 *svp = newSVsv (sv);
777 SvREFCNT_dec (old);
778 return 0;
779 }
780 }
781
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783}
784
785static void
786coro_setup (pTHX_ struct coro *coro)
787{
788 /*
789 * emulate part of the perl startup here.
790 */
791 coro_init_stacks (aTHX);
792
793 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL;
796 PL_comppad = 0;
797 PL_curpm = 0;
798 PL_curpad = 0;
799 PL_localizing = 0;
800 PL_dirty = 0;
801 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0;
804#endif
805
806 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809
810 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
816
817 {
818 dSP;
819 LOGOP myop;
820
821 Zero (&myop, 1, LOGOP);
822 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID;
824
825 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
827 PUTBACK;
828 PL_op = (OP *)&myop;
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN;
831 }
832
833 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */
838 ENTER;
839}
840
841static void
842coro_destroy (pTHX_ struct coro *coro)
843{
844 if (!IN_DESTRUCT)
845 {
846 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0);
848 assert (PL_tmps_floor == -1);
849
850 /* free all temporaries */
851 FREETMPS;
852 assert (PL_tmps_ix == -1);
853
854 /* unwind all extra stacks */
855 POPSTACK_TO (PL_mainstack);
856
857 /* unwind main stack */
858 dounwind (-1);
859 }
860
861 SvREFCNT_dec (GvSV (PL_defgv));
862 SvREFCNT_dec (GvAV (PL_defgv));
863 SvREFCNT_dec (GvSV (PL_errgv));
864 SvREFCNT_dec (PL_defoutgv);
865 SvREFCNT_dec (PL_rs);
866 SvREFCNT_dec (GvSV (irsgv));
867
868 SvREFCNT_dec (PL_diehook);
869 SvREFCNT_dec (PL_warnhook);
870
871 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw);
873
874 coro_destroy_stacks (aTHX);
875}
876
877static void
878free_coro_mortal (pTHX)
879{
880 if (expect_true (coro_mortal))
881 {
882 SvREFCNT_dec (coro_mortal);
883 coro_mortal = 0;
884 }
885}
886
887static int
888runops_trace (pTHX)
889{
890 COP *oldcop = 0;
891 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx;
894
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 {
897 PERL_ASYNC_CHECK ();
898
899 if (cctx->flags & CC_TRACE_ALL)
900 {
901 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
902 {
903 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
904 SV **bot, **top;
905 AV *av = newAV (); /* return values */
906 SV **cb;
907 dSP;
908
909 GV *gv = CvGV (cx->blk_sub.cv);
910 SV *fullname = sv_2mortal (newSV (0));
911 if (isGV (gv))
912 gv_efullname3 (fullname, gv, 0);
913
914 bot = PL_stack_base + cx->blk_oldsp + 1;
915 top = cx->blk_gimme == G_ARRAY ? SP + 1
916 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot;
918
919 av_extend (av, top - bot);
920 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++));
922
923 PL_runops = RUNOPS_DEFAULT;
924 ENTER;
925 SAVETMPS;
926 EXTEND (SP, 3);
927 PUSHMARK (SP);
928 PUSHs (&PL_sv_no);
929 PUSHs (fullname);
930 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
931 PUTBACK;
932 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
933 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
934 SPAGAIN;
935 FREETMPS;
936 LEAVE;
937 PL_runops = runops_trace;
938 }
939
940 if (oldcop != PL_curcop)
941 {
942 oldcop = PL_curcop;
943
944 if (PL_curcop != &PL_compiling)
945 {
946 SV **cb;
947
948 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
949 {
950 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
951
952 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
953 {
954 runops_proc_t old_runops = PL_runops;
955 dSP;
956 GV *gv = CvGV (cx->blk_sub.cv);
957 SV *fullname = sv_2mortal (newSV (0));
958
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 PL_runops = RUNOPS_DEFAULT;
963 ENTER;
964 SAVETMPS;
965 EXTEND (SP, 3);
966 PUSHMARK (SP);
967 PUSHs (&PL_sv_yes);
968 PUSHs (fullname);
969 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
970 PUTBACK;
971 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
972 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
973 SPAGAIN;
974 FREETMPS;
975 LEAVE;
976 PL_runops = runops_trace;
977 }
978
979 oldcxix = cxstack_ix;
980 }
981
982 if (cctx->flags & CC_TRACE_LINE)
983 {
984 dSP;
985
986 PL_runops = RUNOPS_DEFAULT;
987 ENTER;
988 SAVETMPS;
989 EXTEND (SP, 3);
990 PL_runops = RUNOPS_DEFAULT;
991 PUSHMARK (SP);
992 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
993 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
994 PUTBACK;
995 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
996 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
997 SPAGAIN;
998 FREETMPS;
999 LEAVE;
1000 PL_runops = runops_trace;
1001 }
1002 }
1003 }
1004 }
1005 }
1006
1007 TAINT_NOT;
1008 return 0;
1009}
1010
1011/* inject a fake call to Coro::State::_cctx_init into the execution */
1012/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */
1014static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx)
1016{
1017 dSP;
1018 LOGOP myop;
1019
1020 PL_top_env = &PL_start_env;
1021
1022 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace;
1024
1025 Zero (&myop, 1, LOGOP);
1026 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028
1029 PUSHMARK (SP);
1030 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK;
1034 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN;
1037}
1038
1039/*
1040 * this is a _very_ stripped down perl interpreter ;)
1041 */
1042static void
1043cctx_run (void *arg)
1044{
1045 dTHX;
1046
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1048 UNLOCK;
1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next;
1052
1053 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055
1056 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op;
1058 perl_run (PL_curinterp);
1059
1060 /*
1061 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept
1066 */
1067 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1069}
1070
1071static coro_cctx *
1072cctx_new ()
1073{
1074 coro_cctx *cctx;
1075 void *stack_start;
1076 size_t stack_size;
1077
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */
1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086
1087 if (cctx->sptr != (void *)-1)
1088 {
1089# if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED;
1095 }
1096 else
1097#endif
1098 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long);
1101
1102 if (!cctx->sptr)
1103 {
1104 perror ("FATAL: unable to allocate stack for coroutine");
1105 _exit (EXIT_FAILURE);
1106 }
1107
1108 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize;
1110 }
1111
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114
1115 return cctx;
1116}
1117
1118static void
1119cctx_destroy (coro_cctx *cctx)
1120{
1121 if (!cctx)
1122 return;
1123
1124 --cctx_count;
1125
1126#if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif
1129
1130#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize);
1133 else
1134#endif
1135 Safefree (cctx->sptr);
1136
1137 Safefree (cctx);
1138}
1139
1140/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1142
1143static coro_cctx *
1144cctx_get (pTHX)
1145{
1146 while (expect_true (cctx_first))
1147 {
1148 coro_cctx *cctx = cctx_first;
1149 cctx_first = cctx->next;
1150 --cctx_idle;
1151
1152 if (expect_true (!CCTX_EXPIRED (cctx)))
1153 return cctx;
1154
1155 cctx_destroy (cctx);
1156 }
1157
1158 return cctx_new ();
1159}
1160
1161static void
1162cctx_put (coro_cctx *cctx)
1163{
1164 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1166 {
1167 coro_cctx *first = cctx_first;
1168 cctx_first = first->next;
1169 --cctx_idle;
1170
1171 cctx_destroy (first);
1172 }
1173
1174 ++cctx_idle;
1175 cctx->next = cctx_first;
1176 cctx_first = cctx;
1177}
1178
1179/** coroutine switching *****************************************************/
1180
1181static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{
1184 if (expect_true (prev != next))
1185 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1188
1189 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1191
1192 if (expect_false (next->flags & CF_DESTROYED))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1194
1195#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1198#endif
1199 }
1200}
1201
1202/* always use the TRANSFER macro */
1203static void NOINLINE
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{
1206 dSTACKLEVEL;
1207 static volatile int has_throw;
1208
1209 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next))
1211 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 }
1215 else if (expect_true (prev != next))
1216 {
1217 coro_cctx *prev__cctx;
1218
1219 if (expect_false (prev->flags & CF_NEW))
1220 {
1221 /* create a new empty context */
1222 Newz (0, prev->cctx, 1, coro_cctx);
1223 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING;
1225 }
1226
1227 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231
1232 /* first get rid of the old state */
1233 save_perl (aTHX_ prev);
1234
1235 if (expect_false (next->flags & CF_NEW))
1236 {
1237 /* need to start coroutine */
1238 next->flags &= ~CF_NEW;
1239 /* setup coroutine call */
1240 coro_setup (aTHX_ next);
1241 }
1242 else
1243 load_perl (aTHX_ next);
1244
1245 prev__cctx = prev->cctx;
1246
1247 /* possibly "free" the cctx */
1248 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL
1250 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx
1252 ))
1253 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1256
1257 prev->cctx = 0;
1258
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1261 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1262 if (!next->cctx)
1263 next->cctx = cctx_get (aTHX);
1264
1265 cctx_put (prev__cctx);
1266 }
1267
1268 ++next->usecount;
1269
1270 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX);
1272
1273 has_throw = !!next->throw;
1274
1275 if (expect_false (prev__cctx != next->cctx))
1276 {
1277 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 }
1281
1282 free_coro_mortal (aTHX);
1283 UNLOCK;
1284
1285 if (expect_false (has_throw))
1286 {
1287 struct coro *coro = SvSTATE (coro_current);
1288
1289 if (coro->throw)
1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
1294 croak (0);
1295 }
1296 }
1297 }
1298}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307
1308/** high level stuff ********************************************************/
1309
1310static int
1311coro_state_destroy (pTHX_ struct coro *coro)
1312{
1313 if (coro->flags & CF_DESTROYED)
1314 return 0;
1315
1316 coro->flags |= CF_DESTROYED;
1317
1318 if (coro->flags & CF_READY)
1319 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready;
1324 UNLOCK;
1325 }
1326 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328
1329 if (coro->mainstack && coro->mainstack != main_mainstack)
1330 {
1331 struct coro temp;
1332
1333 if (coro->flags & CF_RUNNING)
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335
1336 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro);
1338
1339 coro_destroy (aTHX_ coro);
1340
1341 load_perl (aTHX_ &temp);
1342
1343 coro->slot = 0;
1344 }
1345
1346 cctx_destroy (coro->cctx);
1347 SvREFCNT_dec (coro->args);
1348
1349 if (coro->next) coro->next->prev = coro->prev;
1350 if (coro->prev) coro->prev->next = coro->next;
1351 if (coro == coro_first) coro_first = coro->next;
1352
1353 return 1;
1354}
1355
1356static int
1357coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1358{
1359 struct coro *coro = (struct coro *)mg->mg_ptr;
1360 mg->mg_ptr = 0;
1361
1362 coro->hv = 0;
1363
1364 if (--coro->refcnt < 0)
1365 {
1366 coro_state_destroy (aTHX_ coro);
1367 Safefree (coro);
1368 }
1369
1370 return 0;
1371}
1372
1373static int
1374coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1375{
1376 struct coro *coro = (struct coro *)mg->mg_ptr;
1377
1378 ++coro->refcnt;
1379
1380 return 0;
1381}
1382
1383static MGVTBL coro_state_vtbl = {
1384 0, 0, 0, 0,
1385 coro_state_free,
1386 0,
1387#ifdef MGf_DUP
1388 coro_state_dup,
1389#else
1390# define MGf_DUP 0
1391#endif
1392};
1393
1394static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{
1397 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta);
1400}
1401
1402static void
1403api_transfer (SV *prev_sv, SV *next_sv)
1404{
1405 dTHX;
1406 struct transfer_args ta;
1407
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1);
1410}
1411
1412/** Coro ********************************************************************/
1413
1414static void
1415coro_enq (pTHX_ SV *coro_sv)
1416{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1418}
1419
1420static SV *
1421coro_deq (pTHX)
1422{
1423 int prio;
1424
1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1426 if (AvFILLp (coro_ready [prio]) >= 0)
1427 return av_shift (coro_ready [prio]);
1428
1429 return 0;
1430}
1431
1432static int
1433api_ready (SV *coro_sv)
1434{
1435 dTHX;
1436 struct coro *coro;
1437 SV *sv_hook;
1438 void (*xs_hook)(void);
1439
1440 if (SvROK (coro_sv))
1441 coro_sv = SvRV (coro_sv);
1442
1443 coro = SvSTATE (coro_sv);
1444
1445 if (coro->flags & CF_READY)
1446 return 0;
1447
1448 coro->flags |= CF_READY;
1449
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1456 ++coro_nready;
1457
1458 UNLOCK;
1459
1460 if (sv_hook)
1461 {
1462 dSP;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (sv_hook, G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 }
1475
1476 if (xs_hook)
1477 xs_hook ();
1478
1479 return 1;
1480}
1481
1482static int
1483api_is_ready (SV *coro_sv)
1484{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487}
1488
1489static void
1490prepare_schedule (pTHX_ struct transfer_args *ta)
1491{
1492 SV *prev_sv, *next_sv;
1493
1494 for (;;)
1495 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX);
1498
1499 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv))
1501 {
1502 dSP;
1503 UNLOCK;
1504
1505 ENTER;
1506 SAVETMPS;
1507
1508 PUSHMARK (SP);
1509 PUTBACK;
1510 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1511 SPAGAIN;
1512
1513 FREETMPS;
1514 LEAVE;
1515 continue;
1516 }
1517
1518 ta->next = SvSTATE (next_sv);
1519
1520 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */
1526 continue;
1527 }
1528
1529 --coro_nready;
1530 UNLOCK;
1531 break;
1532 }
1533
1534 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv);
1537 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY);
1539 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv);
1541
1542 LOCK;
1543 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv;
1545 UNLOCK;
1546}
1547
1548static void
1549prepare_cede (pTHX_ struct transfer_args *ta)
1550{
1551 api_ready (coro_current);
1552 prepare_schedule (aTHX_ ta);
1553}
1554
1555static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta)
1557{
1558 if (coro_nready)
1559 {
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta);
1562 api_ready (prev);
1563 return 1;
1564 }
1565 else
1566 return 0;
1567}
1568
1569static void
1570api_schedule (void)
1571{
1572 dTHX;
1573 struct transfer_args ta;
1574
1575 prepare_schedule (aTHX_ &ta);
1576 TRANSFER (ta, 1);
1577}
1578
1579static int
1580api_cede (void)
1581{
1582 dTHX;
1583 struct transfer_args ta;
1584
1585 prepare_cede (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1);
1590 return 1;
1591 }
1592 else
1593 return 0;
1594}
1595
1596static int
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
1603 {
1604 TRANSFER (ta, 1);
1605 return 1;
1606 }
1607 else
1608 return 0;
1609}
1610
1611static void
1612api_trace (SV *coro_sv, int flags)
1613{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv);
1616
1617 if (flags & CC_TRACE)
1618 {
1619 if (!coro->cctx)
1620 coro->cctx = cctx_new ();
1621 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack");
1623
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 {
1628 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1629
1630 if (coro->flags & CF_RUNNING)
1631 PL_runops = RUNOPS_DEFAULT;
1632 else
1633 coro->slot->runops = RUNOPS_DEFAULT;
1634 }
1635}
1636
1637static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 AV *padlist;
1641 AV *av = (AV *)mg->mg_obj;
1642
1643 abort ();
1644
1645 return 0;
1646}
1647
1648static MGVTBL coro_gensub_vtbl = {
1649 0, 0, 0, 0,
1650 coro_gensub_free
1651};
1652
1653/*****************************************************************************/
1654/* PerlIO::cede */
1655
1656typedef struct
1657{
1658 PerlIOBuf base;
1659 NV next, every;
1660} PerlIOCede;
1661
1662static IV
1663PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1664{
1665 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1666
1667 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1668 self->next = nvtime () + self->every;
1669
1670 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1671}
1672
1673static SV *
1674PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1675{
1676 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1677
1678 return newSVnv (self->every);
1679}
1680
1681static IV
1682PerlIOCede_flush (pTHX_ PerlIO *f)
1683{
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime ();
1686
1687 if (now >= self->next)
1688 {
1689 api_cede ();
1690 self->next = now + self->every;
1691 }
1692
1693 return PerlIOBuf_flush (f);
1694}
1695
1696static PerlIO_funcs PerlIO_cede =
1697{
1698 sizeof(PerlIO_funcs),
1699 "cede",
1700 sizeof(PerlIOCede),
1701 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1702 PerlIOCede_pushed,
1703 PerlIOBuf_popped,
1704 PerlIOBuf_open,
1705 PerlIOBase_binmode,
1706 PerlIOCede_getarg,
1707 PerlIOBase_fileno,
1708 PerlIOBuf_dup,
1709 PerlIOBuf_read,
1710 PerlIOBuf_unread,
1711 PerlIOBuf_write,
1712 PerlIOBuf_seek,
1713 PerlIOBuf_tell,
1714 PerlIOBuf_close,
1715 PerlIOCede_flush,
1716 PerlIOBuf_fill,
1717 PerlIOBase_eof,
1718 PerlIOBase_error,
1719 PerlIOBase_clearerr,
1720 PerlIOBase_setlinebuf,
1721 PerlIOBuf_get_base,
1722 PerlIOBuf_bufsiz,
1723 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt,
1726};
1727
1728
1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1730
1731PROTOTYPES: DISABLE
1732
1733BOOT:
1734{
1735#ifdef USE_ITHREADS
1736 MUTEX_INIT (&coro_mutex);
1737#endif
1738 BOOT_PAGESIZE;
1739
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1742
1743 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1744 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1745 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1746
1747 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1748 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1749 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1750
1751 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1752
1753 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1754 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1755 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1756 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1757
1758 main_mainstack = PL_mainstack;
1759 main_top_env = PL_top_env;
1760
1761 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev;
1763
1764 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION;
1766 coroapi.transfer = api_transfer;
1767
1768 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770
1771 if (!svp) croak ("Time::HiRes is required");
1772 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1773
1774 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1775 }
1776
1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1778}
1779
1780SV *
1781new (char *klass, ...)
1782 CODE:
1783{
1784 struct coro *coro;
1785 MAGIC *mg;
1786 HV *hv;
1787 int i;
1788
1789 Newz (0, coro, 1, struct coro);
1790 coro->args = newAV ();
1791 coro->flags = CF_NEW;
1792
1793 if (coro_first) coro_first->prev = coro;
1794 coro->next = coro_first;
1795 coro_first = coro;
1796
1797 coro->hv = hv = newHV ();
1798 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1799 mg->mg_flags |= MGf_DUP;
1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1801
1802 av_extend (coro->args, items - 1);
1803 for (i = 1; i < items; i++)
1804 av_push (coro->args, newSVsv (ST (i)));
1805}
1806 OUTPUT:
1807 RETVAL
1808
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
1812void
1813_set_stacklevel (...)
1814 ALIAS:
1815 Coro::State::transfer = 1
1816 Coro::schedule = 2
1817 Coro::cede = 3
1818 Coro::cede_notself = 4
1819 CODE:
1820{
1821 struct transfer_args ta;
1822
1823 PUTBACK;
1824 switch (ix)
1825 {
1826 case 0:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1828 ta.next = 0;
1829 break;
1830
1831 case 1:
1832 if (items != 2)
1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1834
1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1836 break;
1837
1838 case 2:
1839 prepare_schedule (aTHX_ &ta);
1840 break;
1841
1842 case 3:
1843 prepare_cede (aTHX_ &ta);
1844 break;
1845
1846 case 4:
1847 if (!prepare_cede_notself (aTHX_ &ta))
1848 XSRETURN_EMPTY;
1849
1850 break;
1851 }
1852 SPAGAIN;
1853
1854 BARRIER;
1855 PUTBACK;
1856 TRANSFER (ta, 0);
1857 SPAGAIN; /* might be the sp of a different coroutine now */
1858 /* be extra careful not to ever do anything after TRANSFER */
1859}
1860
1861bool
1862_destroy (SV *coro_sv)
1863 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1865 OUTPUT:
1866 RETVAL
1867
1868void
1869_exit (int code)
1870 PROTOTYPE: $
1871 CODE:
1872 _exit (code);
1873
1874int
1875cctx_stacksize (int new_stacksize = 0)
1876 CODE:
1877 RETVAL = coro_stacksize;
1878 if (new_stacksize)
1879 coro_stacksize = new_stacksize;
1880 OUTPUT:
1881 RETVAL
1882
1883int
1884cctx_count ()
1885 CODE:
1886 RETVAL = cctx_count;
1887 OUTPUT:
1888 RETVAL
1889
1890int
1891cctx_idle ()
1892 CODE:
1893 RETVAL = cctx_idle;
1894 OUTPUT:
1895 RETVAL
1896
1897void
1898list ()
1899 PPCODE:
1900{
1901 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv)
1904 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1905}
1906
1907void
1908call (Coro::State coro, SV *coderef)
1909 ALIAS:
1910 eval = 1
1911 CODE:
1912{
1913 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1914 {
1915 struct coro temp;
1916
1917 if (!(coro->flags & CF_RUNNING))
351 { 1918 {
352 /* I never used formats, so how should I know how these are implemented? */ 1919 PUTBACK;
353 /* my bold guess is as a simple, plain sub... */ 1920 save_perl (aTHX_ &temp);
354 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 1921 load_perl (aTHX_ coro);
1922 }
1923
1924 {
1925 dSP;
1926 ENTER;
1927 SAVETMPS;
1928 PUTBACK;
1929 PUSHSTACK;
1930 PUSHMARK (SP);
1931
1932 if (ix)
1933 eval_sv (coderef, 0);
1934 else
1935 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1936
1937 POPSTACK;
1938 SPAGAIN;
1939 FREETMPS;
1940 LEAVE;
1941 PUTBACK;
1942 }
1943
1944 if (!(coro->flags & CF_RUNNING))
1945 {
1946 save_perl (aTHX_ coro);
1947 load_perl (aTHX_ &temp);
1948 SPAGAIN;
355 } 1949 }
356 } 1950 }
357 while (cxix >= 0); 1951}
358 1952
359 if (top_si->si_type == PERLSI_MAIN) 1953SV *
360 break; 1954is_ready (Coro::State coro)
1955 PROTOTYPE: $
1956 ALIAS:
1957 is_ready = CF_READY
1958 is_running = CF_RUNNING
1959 is_new = CF_NEW
1960 is_destroyed = CF_DESTROYED
1961 CODE:
1962 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT:
1964 RETVAL
361 1965
362 top_si = top_si->si_prev; 1966void
363 ccstk = top_si->si_cxstack; 1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
364 cxix = top_si->si_cxix; 1968
1969SV *
1970has_cctx (Coro::State coro)
1971 PROTOTYPE: $
1972 CODE:
1973 RETVAL = boolSV (!!coro->cctx);
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978is_traced (Coro::State coro)
1979 PROTOTYPE: $
1980 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT:
1983 RETVAL
1984
1985IV
1986rss (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 usecount = 1
1990 CODE:
1991 switch (ix)
1992 {
1993 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1994 case 1: RETVAL = coro->usecount; break;
365 } 1995 }
1996 OUTPUT:
1997 RETVAL
366 1998
367 PUTBACK; 1999void
368 } 2000force_cctx ()
2001 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0;
369 2004
370 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 2005void
371 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 2006throw (Coro::State self, SV *throw = &PL_sv_undef)
372 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 2007 PROTOTYPE: $;$
2008 CODE:
2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
373 2011
374 /* I have not the slightest idea of why av_reify is necessary */ 2012void
375 /* but if it's missing the defav contents magically get replaced sometimes */ 2013swap_defsv (Coro::State self)
376 if (c->defav) 2014 PROTOTYPE: $
377 av_reify (c->defav); 2015 ALIAS:
378 2016 swap_defav = 1
379 c->dowarn = PL_dowarn; 2017 CODE:
380 2018 if (!self->slot)
381 c->curstackinfo = PL_curstackinfo; 2019 croak ("cannot swap state with coroutine that has no saved state");
382 c->curstack = PL_curstack; 2020 else
383 c->mainstack = PL_mainstack;
384 c->stack_sp = PL_stack_sp;
385 c->op = PL_op;
386 c->curpad = PL_curpad;
387 c->stack_base = PL_stack_base;
388 c->stack_max = PL_stack_max;
389 c->tmps_stack = PL_tmps_stack;
390 c->tmps_floor = PL_tmps_floor;
391 c->tmps_ix = PL_tmps_ix;
392 c->tmps_max = PL_tmps_max;
393 c->markstack = PL_markstack;
394 c->markstack_ptr = PL_markstack_ptr;
395 c->markstack_max = PL_markstack_max;
396 c->scopestack = PL_scopestack;
397 c->scopestack_ix = PL_scopestack_ix;
398 c->scopestack_max = PL_scopestack_max;
399 c->savestack = PL_savestack;
400 c->savestack_ix = PL_savestack_ix;
401 c->savestack_max = PL_savestack_max;
402 c->retstack = PL_retstack;
403 c->retstack_ix = PL_retstack_ix;
404 c->retstack_max = PL_retstack_max;
405 c->curcop = PL_curcop;
406}
407
408/*
409 * destroy the stacks, the callchain etc...
410 * still there is a memleak of 128 bytes...
411 */
412STATIC void
413destroy_stacks(pTHX)
414{
415 /* is this ugly, I ask? */
416 while (PL_scopestack_ix)
417 LEAVE;
418
419 /* sure it is, but more important: is it correct?? :/ */
420 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
421 FREETMPS;
422
423 while (PL_curstackinfo->si_next)
424 PL_curstackinfo = PL_curstackinfo->si_next;
425
426 while (PL_curstackinfo)
427 {
428 PERL_SI *p = PL_curstackinfo->si_prev;
429
430 { 2021 {
431 dSP; 2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
432 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
433 PUTBACK; /* possibly superfluous */ 2024
2025 SV *tmp = *src; *src = *dst; *dst = tmp;
434 } 2026 }
435 2027
436 dounwind(-1); 2028MODULE = Coro::State PACKAGE = Coro
437 2029
438 SvREFCNT_dec(PL_curstackinfo->si_stack); 2030BOOT:
439 Safefree(PL_curstackinfo->si_cxstack);
440 Safefree(PL_curstackinfo);
441 PL_curstackinfo = p;
442 }
443
444 Safefree(PL_tmps_stack);
445 Safefree(PL_markstack);
446 Safefree(PL_scopestack);
447 Safefree(PL_savestack);
448 Safefree(PL_retstack);
449}
450
451STATIC void
452transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
453{ 2031{
454 dSP; 2032 int i;
455 2033
456 if (prev != next) 2034 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
457 { 2035 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
458 /* 2036 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
459 * this could be done in newprocess which would lead to 2037
460 * extremely elegant and fast (just SAVE/LOAD) 2038 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
461 * code here, but lazy allocation of stacks has also 2039 SvREADONLY_on (coro_current);
462 * some virtues and the overhead of the if() is nil. 2040
463 */ 2041 coro_stash = gv_stashpv ("Coro", TRUE);
464 if (next->mainstack) 2042
2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2049
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV ();
2052
465 { 2053 {
466 SAVE (prev, flags); 2054 SV *sv = perl_get_sv ("Coro::API", TRUE);
467 LOAD (next); 2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
468 /* mark this state as in-use */ 2056
469 next->mainstack = 0; 2057 coroapi.schedule = api_schedule;
470 next->tmps_ix = -2; 2058 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready;
2063 coroapi.current = coro_current;
2064
2065 GCoroAPI = &coroapi;
2066 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv);
471 } 2068 }
472 else if (next->tmps_ix == -2) 2069}
2070
2071void
2072_set_current (SV *current)
2073 PROTOTYPE: $
2074 CODE:
2075 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
2077
2078void
2079_set_readyhook (SV *hook)
2080 PROTOTYPE: $
2081 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086
2087int
2088prio (Coro::State coro, int newprio = 0)
2089 ALIAS:
2090 nice = 1
2091 CODE:
2092{
2093 RETVAL = coro->prio;
2094
2095 if (items > 1)
473 { 2096 {
474 croak ("tried to transfer to running coroutine"); 2097 if (ix)
2098 newprio = coro->prio - newprio;
2099
2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2102
2103 coro->prio = newprio;
475 } 2104 }
476 else 2105}
2106 OUTPUT:
2107 RETVAL
2108
2109SV *
2110ready (SV *self)
2111 PROTOTYPE: $
2112 CODE:
2113 RETVAL = boolSV (api_ready (self));
2114 OUTPUT:
2115 RETVAL
2116
2117int
2118nready (...)
2119 PROTOTYPE:
2120 CODE:
2121 RETVAL = coro_nready;
2122 OUTPUT:
2123 RETVAL
2124
2125# for async_pool speedup
2126void
2127_pool_1 (SV *cb)
2128 CODE:
2129{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current);
2132 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av;
2135 int i, len;
2136
2137 if (!invoke)
477 { 2138 {
478 /* 2139 SV *old = PL_diehook;
479 * emulate part of the perl startup here. 2140 PL_diehook = 0;
480 */
481 UNOP myop;
482
483 SAVE (prev, -1); /* first get rid of the old state */
484
485 init_stacks (); /* from perl.c */
486 SPAGAIN;
487
488 PL_op = (OP *)&myop;
489 /*PL_curcop = 0;*/
490 SvREFCNT_dec (GvAV (PL_defgv)); 2141 SvREFCNT_dec (old);
491 GvAV (PL_defgv) = next->args; 2142 croak ("\3async_pool terminate\2\n");
492
493 Zero(&myop, 1, UNOP);
494 myop.op_next = Nullop;
495 myop.op_flags = OPf_WANT_VOID;
496
497 PUSHMARK(SP);
498 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
499 /*
500 * the next line is slightly wrong, as PL_op->op_next
501 * is actually being executed so we skip the first op.
502 * that doesn't matter, though, since it is only
503 * pp_nextstate and we never return...
504 * ah yes, and I don't care anyways ;)
505 */
506 PUTBACK;
507 PL_op = pp_entersub(aTHX);
508 SPAGAIN;
509
510 ENTER; /* necessary e.g. for dounwind */
511 } 2143 }
512 }
513}
514 2144
2145 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2147
2148 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150
2151 invoke_av = (AV *)SvRV (invoke);
2152 len = av_len (invoke_av);
2153
2154 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2155
2156 if (len > 0)
2157 {
2158 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2161 }
2162
2163 SvREFCNT_dec (invoke);
2164}
2165
2166void
2167_pool_2 (SV *cb)
2168 CODE:
2169{
2170 struct coro *coro = SvSTATE (coro_current);
2171
2172 sv_setsv (cb, &PL_sv_undef);
2173
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0;
2176
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 {
2180 SV *old = PL_diehook;
2181 PL_diehook = 0;
2182 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n");
2184 }
2185
2186 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189
2190 coro->prio = 0;
2191
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0);
2194
2195 av_push (av_async_pool, newSVsv (coro_current));
2196}
2197
2198#if 0
2199
2200void
2201_generator_call (...)
2202 PROTOTYPE: @
2203 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
2208SV *
2209gensub (SV *sub, ...)
2210 PROTOTYPE: &;@
2211 CODE:
2212{
2213 struct coro *coro;
2214 MAGIC *mg;
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i;
2218
2219 CvGV (ncv) = CvGV (cv);
2220 CvFILE (ncv) = CvFILE (cv);
2221
2222 Newz (0, coro, 1, struct coro);
2223 coro->args = newAV ();
2224 coro->flags = CF_NEW;
2225
2226 av_extend (coro->args, items - 1);
2227 for (i = 1; i < items; i++)
2228 av_push (coro->args, newSVsv (ST (i)));
2229
2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
2240}
2241 OUTPUT:
2242 RETVAL
2243
2244#endif
2245
2246
515MODULE = Coro::State PACKAGE = Coro::State 2247MODULE = Coro::State PACKAGE = Coro::AIO
516 2248
517PROTOTYPES: ENABLE 2249SV *
2250_get_state ()
2251 CODE:
2252{
2253 struct io_state *data;
2254
2255 RETVAL = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL);
2257 SvCUR_set (RETVAL, sizeof (struct io_state));
2258 SvPOK_only (RETVAL);
2259
2260 data->errorno = errno;
2261 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache;
2264}
2265 OUTPUT:
2266 RETVAL
2267
2268void
2269_set_state (char *data_)
2270 PROTOTYPE: $
2271 CODE:
2272{
2273 struct io_state *data = (void *)data_;
2274
2275 errno = data->errorno;
2276 PL_laststype = data->laststype;
2277 PL_laststatval = data->laststatval;
2278 PL_statcache = data->statcache;
2279}
2280
2281
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent
518 2283
519BOOT: 2284BOOT:
520{ /* {} necessary for stoopid perl-5.6.x */ 2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
521 HV * stash = gv_stashpvn("Coro::State", 10, TRUE);
522 2286
523 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2287SV *
524 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2288_schedule (...)
525 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2289 PROTOTYPE: @
2290 CODE:
2291{
2292 static int incede;
526 2293
527 if (!padlist_cache) 2294 api_cede_notself ();
528 padlist_cache = newHV ();
529 2295
530 main_mainstack = PL_mainstack; 2296 ++incede;
531} 2297 while (coro_nready >= incede && api_cede ())
532
533Coro::State
534_newprocess(args)
535 SV * args
536 PROTOTYPE: $
537 CODE:
538 Coro__State coro;
539
540 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
541 croak ("Coro::State::_newprocess expects an arrayref");
542 2298 ;
543 New (0, coro, 1, struct coro);
544 2299
545 coro->mainstack = 0; /* actual work is done inside transfer */ 2300 sv_setsv (sv_activity, &PL_sv_undef);
546 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2301 if (coro_nready >= incede)
547
548 RETVAL = coro;
549 OUTPUT:
550 RETVAL
551
552void
553transfer(prev, next, flags = TRANSFER_SAVE_ALL)
554 Coro::State_or_hashref prev
555 Coro::State_or_hashref next
556 int flags
557 PROTOTYPE: @
558 CODE:
559
560 transfer (aTHX_ prev, next, flags);
561
562void
563DESTROY(coro)
564 Coro::State coro
565 CODE:
566
567 if (coro->mainstack && coro->mainstack != main_mainstack)
568 { 2302 {
569 struct coro temp; 2303 PUSHMARK (SP);
570 2304 PUTBACK;
571 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2305 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
572 LOAD(aTHX_ coro); 2306 SPAGAIN;
573
574 destroy_stacks ();
575
576 LOAD((&temp)); /* this will get rid of defsv etc.. */
577 } 2307 }
578 2308
579 Safefree (coro); 2309 --incede;
2310}
580 2311
581 /*
582 * there is one problematic case left (remember _recurse?)
583 * consider the case when we
584 *
585 * 1. start a coroutine
586 * 2. inside it descend into some xs functions
587 * 3. xs function calls a callback
588 * 4. callback switches to $main
589 * 5. $main ends - we will end inside the xs function
590 * 6. xs function returns and perl executes - what?
591 *
592 * to avoid this case we recurse in this function
593 * and simply call my_exit(0), skipping other xs functions
594 */
595 2312
596#if 0
597void
598_recurse()
599 CODE:
600 LEAVE;
601 PL_stack_sp = PL_stack_base + ax - 1;
602 PL_op = PL_op->op_next;
603 CALLRUNOPS(aTHX);
604 printf ("my_exit\n");
605 my_exit (0);
606
607#endif
608
609void
610flush()
611 CODE:
612#ifdef MAY_FLUSH
613 flush_padlist_cache ();
614#endif
615
616MODULE = Coro::State PACKAGE = Coro::Cont 2313MODULE = Coro::State PACKAGE = PerlIO::cede
617 2314
618# this is dirty (do you hear me?) and should be in it's own .xs 2315BOOT:
619 2316 PerlIO_define_layer (aTHX_ &PerlIO_cede);
620void
621result(...)
622 PROTOTYPE: @
623 CODE:
624 static SV *returnstk;
625 SV *sv;
626 AV *defav = GvAV (PL_defgv);
627 struct coro *prev, *next;
628
629 if (!returnstk)
630 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
631
632 /* set up @_ -- ugly */
633 av_clear (defav);
634 av_fill (defav, items - 1);
635 while (items--)
636 av_store (defav, items, SvREFCNT_inc (ST(items)));
637
638 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
639 sv = av_pop ((AV *)SvRV (returnstk));
640 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
641 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
642 SvREFCNT_dec (sv);
643 transfer(prev, next, 0);
644

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