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Comparing Coro/Coro/State.xs (file contents):
Revision 1.16 by root, Wed Jul 25 04:26:55 2001 UTC vs.
Revision 1.209 by root, Wed Oct 10 02:58:17 2007 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"
4 9
5#include "libcoro/coro.c" 10#include "patchlevel.h"
11
12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
6 16
7#ifdef HAVE_MMAP 17#ifdef HAVE_MMAP
8# include <unistd.h> 18# include <unistd.h>
9# include <sys/mman.h> 19# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 20# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
13# else 23# else
14# undef HAVE_MMAP 24# undef HAVE_MMAP
15# endif 25# endif
16# endif 26# endif
27# include <limits.h>
28# ifndef PAGESIZE
29# define PAGESIZE pagesize
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
31static long pagesize;
32# else
33# define BOOT_PAGESIZE (void)0
17#endif 34# 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 35#else
30# define TRANSFER_LAZY_STACK 0x00000000 36# define PAGESIZE 0
37# define BOOT_PAGESIZE (void)0
38#endif
39
40#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif
46
47/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8
49
50#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
31#endif 59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
32 76
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 77/* 5.8.7 */
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
35 81
36#define SUB_INIT "Coro::State::initialize" 82/* 5.8.8 */
37#define UCORO_STATE "_coro_state" 83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
38 89
39/* The next macro should delcare a variable stacklevel that contains and approximation 90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40 * to the current C stack pointer. It's property is that it changes with each call 91# undef CORO_STACKGUARD
41 * and should be unique. */ 92#endif
93
94#ifndef CORO_STACKGUARD
95# define CORO_STACKGUARD 0
96#endif
97
98/* prefer perl internal functions over our own? */
99#ifndef CORO_PREFER_PERL_FUNCTIONS
100# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif
102
103/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */
105#define dSTACKLEVEL volatile char stacklevel
42#define dSTACKLEVEL void *stacklevel = &stacklevel 106#define STACKLEVEL ((void *)&stacklevel)
43 107
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 108#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 109
46/* this is actually not only the c stack but also c registers etc... */ 110#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value))
114#else
115# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr)
118#endif
119
120#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1)
122
123#define NOINLINE attribute ((noinline))
124
125#include "CoroAPI.h"
126
127#ifdef USE_ITHREADS
128static perl_mutex coro_mutex;
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif
135
136#define strpair(const) const, sizeof (const) - 1
137
138/* helper storage struct for Coro::AIO */
139struct io_state
140{
141 int errorno;
142 I32 laststype;
143 int laststatval;
144 Stat_t statcache;
145};
146
147static size_t coro_stacksize = CORO_STACKSIZE;
148static struct CoroAPI coroapi;
149static AV *main_mainstack; /* used to differentiate between $main and others */
150static JMPENV *main_top_env;
151static HV *coro_state_stash, *coro_stash;
152static SV *coro_mortal; /* will be freed after next transfer */
153
154static GV *irsgv; /* $/ */
155static GV *stdoutgv; /* *STDOUT */
156
157static HV *hv_sig; /* %SIG */
158static SV *sv_diehook;
159static SV *sv_warnhook;
160
161/* async_pool helper stuff */
162static SV *sv_pool_rss;
163static SV *sv_pool_size;
164static AV *av_async_pool;
165
166static struct coro_cctx *cctx_first[3]; /* index by GIMME_V type, void, scalar, array */
167static int cctx_count, cctx_idle[3];
168
169enum {
170 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176};
177
178/* this is a structure representing a c-level coroutine */
179typedef struct coro_cctx {
180 struct coro_cctx *next;
181
182 /* the stack */
183 void *sptr;
184 size_t ssize;
185
186 /* cpu state */
187 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
188 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
189 JMPENV *top_env;
190 coro_context cctx;
191
192#if CORO_USE_VALGRIND
193 int valgrind_id;
194#endif
195 unsigned char flags;
196} coro_cctx;
197
198enum {
199 CF_RUNNING = 0x0001, /* coroutine is running */
200 CF_READY = 0x0002, /* coroutine is ready */
201 CF_NEW = 0x0004, /* has never been switched to */
202 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
203};
204
205/* the structure where most of the perl state is stored, overlaid on the cxstack */
47typedef struct { 206typedef struct {
48 int refcnt; /* pointer reference counter */ 207 SV *defsv;
49 int usecnt; /* shared by how many coroutines */ 208 AV *defav;
50 int gencnt; /* generation counter */ 209 SV *errsv;
210 SV *irsgv;
211#define VAR(name,type) type name;
212# include "state.h"
213#undef VAR
214} perl_slots;
51 215
52 coro_context cctx; 216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53 217
54 void *sptr; 218/* 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 { 219struct coro {
61 /* the optional C context */ 220 /* the c coroutine allocated to this perl coroutine, if any */
62 coro_stack *stack; 221 coro_cctx *cctx;
63 void *cursp; 222 int gimme;
64 int gencnt;
65 223
66 /* optionally saved, might be zero */ 224 /* 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; 225 AV *mainstack;
78 SV **stack_sp; 226 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;
102 227
103 /* data associated with this coroutine (initial args) */ 228 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 229 int refcnt; /* coroutines are refcounted, yes */
230 int flags; /* CF_ flags */
231 HV *hv; /* the perl hash associated with this coro, if any */
232
233 /* statistics */
234 int usecount; /* number of transfers to this coro */
235
236 /* coro process data */
237 int prio;
238 SV *throw; /* exception to be thrown */
239
240 /* async_pool */
241 SV *saved_deffh;
242
243 /* linked list */
244 struct coro *next, *prev;
105}; 245};
106 246
107typedef struct coro *Coro__State; 247typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 248typedef struct coro *Coro__State_or_hashref;
109 249
110static AV *main_mainstack; /* used to differentiate between $main and others */ 250/** Coro ********************************************************************/
111static HV *coro_state_stash;
112static SV *ucoro_state_sv;
113static U32 ucoro_state_hash;
114static HV *padlist_cache;
115 251
116/* mostly copied from op.c:cv_clone2 */ 252#define PRIO_MAX 3
117STATIC AV * 253#define PRIO_HIGH 1
118clone_padlist (AV *protopadlist) 254#define PRIO_NORMAL 0
255#define PRIO_LOW -1
256#define PRIO_IDLE -3
257#define PRIO_MIN -4
258
259/* for Coro.pm */
260static SV *coro_current;
261static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
262static int coro_nready;
263static struct coro *coro_first;
264
265/** lowlevel stuff **********************************************************/
266
267static SV *
268coro_get_sv (const char *name, int create)
119{ 269{
120 AV *av; 270#if PERL_VERSION_ATLEAST (5,9,0)
121 I32 ix; 271 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
122 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 272 get_sv (name, create);
123 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 273#endif
124 SV **pname = AvARRAY (protopad_name); 274 return get_sv (name, create);
125 SV **ppad = AvARRAY (protopad); 275}
126 I32 fname = AvFILLp (protopad_name); 276
127 I32 fpad = AvFILLp (protopad); 277static AV *
278coro_get_av (const char *name, int create)
279{
280#if PERL_VERSION_ATLEAST (5,9,0)
281 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
282 get_av (name, create);
283#endif
284 return get_av (name, create);
285}
286
287static HV *
288coro_get_hv (const char *name, int create)
289{
290#if PERL_VERSION_ATLEAST (5,9,0)
291 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
292 get_hv (name, create);
293#endif
294 return get_hv (name, create);
295}
296
297static AV *
298coro_clone_padlist (pTHX_ CV *cv)
299{
300 AV *padlist = CvPADLIST (cv);
128 AV *newpadlist, *newpad_name, *newpad; 301 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);
138 302
139 newpadlist = newAV (); 303 newpadlist = newAV ();
140 AvREAL_off (newpadlist); 304 AvREAL_off (newpadlist);
141 av_store (newpadlist, 0, (SV *) newpad_name); 305#if PERL_VERSION_ATLEAST (5,9,0)
306 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
307#else
308 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
309#endif
310 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
311 --AvFILLp (padlist);
312
313 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
142 av_store (newpadlist, 1, (SV *) newpad); 314 av_store (newpadlist, 1, (SV *)newpad);
143 315
144 av = newAV (); /* will be @_ */ 316 return newpadlist;
145 av_extend (av, 0); 317}
146 av_store (newpad, 0, (SV *) av);
147 AvFLAGS (av) = AVf_REIFY;
148 318
149 for (ix = fpad; ix > 0; ix--) 319static void
320free_padlist (pTHX_ AV *padlist)
321{
322 /* may be during global destruction */
323 if (SvREFCNT (padlist))
150 { 324 {
151 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 325 I32 i = AvFILLp (padlist);
152 if (namesv && namesv != &PL_sv_undef) 326 while (i >= 0)
153 { 327 {
154 char *name = SvPVX (namesv); /* XXX */ 328 SV **svp = av_fetch (padlist, i--, FALSE);
155 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 329 if (svp)
156 { /* lexical from outside? */
157 npad[ix] = SvREFCNT_inc (ppad[ix]);
158 } 330 {
159 else
160 { /* our own lexical */
161 SV *sv; 331 SV *sv;
162 if (*name == '&') 332 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163 sv = SvREFCNT_inc (ppad[ix]); 333 SvREFCNT_dec (sv);
164 else if (*name == '@') 334
165 sv = (SV *) newAV (); 335 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 } 336 }
174 } 337 }
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 }
186 338
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); 339 SvREFCNT_dec ((SV*)padlist);
227 } 340 }
228} 341}
229#endif 342
343static int
344coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
345{
346 AV *padlist;
347 AV *av = (AV *)mg->mg_obj;
348
349 /* casting is fun. */
350 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
351 free_padlist (aTHX_ padlist);
352
353 SvREFCNT_dec (av);
354
355 return 0;
356}
357
358#define PERL_MAGIC_coro PERL_MAGIC_ext
359
360static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
361
362#define CORO_MAGIC(cv) \
363 SvMAGIC (cv) \
364 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
365 ? SvMAGIC (cv) \
366 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
367 : 0
368
369static struct coro *
370SvSTATE_ (pTHX_ SV *coro)
371{
372 HV *stash;
373 MAGIC *mg;
374
375 if (SvROK (coro))
376 coro = SvRV (coro);
377
378 if (expect_false (SvTYPE (coro) != SVt_PVHV))
379 croak ("Coro::State object required");
380
381 stash = SvSTASH (coro);
382 if (expect_false (stash != coro_stash && stash != coro_state_stash))
383 {
384 /* very slow, but rare, check */
385 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
386 croak ("Coro::State object required");
387 }
388
389 mg = CORO_MAGIC (coro);
390 return (struct coro *)mg->mg_ptr;
391}
392
393#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
230 394
231/* the next two functions merely cache the padlists */ 395/* the next two functions merely cache the padlists */
232STATIC void 396static void
233get_padlist (CV *cv) 397get_padlist (pTHX_ CV *cv)
234{ 398{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 399 MAGIC *mg = CORO_MAGIC (cv);
400 AV *av;
236 401
237 if (he && AvFILLp ((AV *)*he) >= 0) 402 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 403 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239 else 404 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 { 405 {
406#if CORO_PREFER_PERL_FUNCTIONS
407 /* this is probably cleaner, but also slower? */
408 CV *cp = Perl_cv_clone (cv);
409 CvPADLIST (cv) = CvPADLIST (cp);
410 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (*he); 411 SvREFCNT_dec (cp);
251 *he = (SV *)newAV (); 412#else
413 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
414#endif
252 } 415 }
253
254 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255} 416}
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
290 417
291static void 418static void
419put_padlist (pTHX_ CV *cv)
420{
421 MAGIC *mg = CORO_MAGIC (cv);
422 AV *av;
423
424 if (expect_false (!mg))
425 {
426 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
427 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
428 mg->mg_virtual = &vtbl_coro;
429 mg->mg_obj = (SV *)newAV ();
430 }
431
432 av = (AV *)mg->mg_obj;
433
434 if (expect_false (AvFILLp (av) >= AvMAX (av)))
435 av_extend (av, AvMAX (av) + 1);
436
437 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
438}
439
440/** load & save, init *******************************************************/
441
442static void
292load_state(pTHX_ Coro__State c) 443load_perl (pTHX_ Coro__State c)
293{ 444{
294 PL_dowarn = c->dowarn; 445 perl_slots *slot = c->slot;
446 c->slot = 0;
295 447
296 PL_curstackinfo = c->curstackinfo;
297 PL_curstack = c->curstack;
298 PL_mainstack = c->mainstack; 448 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;
323 449
324 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 450 GvSV (PL_defgv) = slot->defsv;
325 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 451 GvAV (PL_defgv) = slot->defav;
326 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 452 GvSV (PL_errgv) = slot->errsv;
453 GvSV (irsgv) = slot->irsgv;
454
455 #define VAR(name,type) PL_ ## name = slot->name;
456 # include "state.h"
457 #undef VAR
458
459 /*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
460 /*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
327 461
328 { 462 {
329 dSP; 463 dSP;
464
330 CV *cv; 465 CV *cv;
331 466
332 /* now do the ugly restore mess */ 467 /* now do the ugly restore mess */
333 while ((cv = (CV *)POPs)) 468 while (expect_true (cv = (CV *)POPs))
334 { 469 {
335 AV *padlist = (AV *)POPs;
336
337 if (padlist)
338 {
339 put_padlist (cv); /* mark this padlist as available */ 470 put_padlist (aTHX_ cv); /* mark this padlist as available */
340 CvPADLIST(cv) = padlist; 471 CvDEPTH (cv) = PTR2IV (POPs);
341#ifdef USE_THREADS 472 CvPADLIST (cv) = (AV *)POPs;
342 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343#endif
344 }
345
346 ++CvDEPTH(cv);
347 } 473 }
348 474
349 PUTBACK; 475 PUTBACK;
350 } 476 }
351} 477}
352 478
353static void 479static void
354save_state(pTHX_ Coro__State c, int flags) 480save_perl (pTHX_ Coro__State c)
355{ 481{
356 { 482 {
357 dSP; 483 dSP;
358 I32 cxix = cxstack_ix; 484 I32 cxix = cxstack_ix;
359 PERL_CONTEXT *ccstk = cxstack; 485 PERL_CONTEXT *ccstk = cxstack;
… …
362 /* 488 /*
363 * the worst thing you can imagine happens first - we have to save 489 * the worst thing you can imagine happens first - we have to save
364 * (and reinitialize) all cv's in the whole callchain :( 490 * (and reinitialize) all cv's in the whole callchain :(
365 */ 491 */
366 492
367 PUSHs (Nullsv); 493 XPUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 494 /* this loop was inspired by pp_caller */
369 for (;;) 495 for (;;)
370 { 496 {
371 do 497 while (expect_true (cxix >= 0))
372 { 498 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 499 PERL_CONTEXT *cx = &ccstk[cxix--];
374 500
375 if (CxTYPE(cx) == CXt_SUB) 501 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376 { 502 {
377 CV *cv = cx->blk_sub.cv; 503 CV *cv = cx->blk_sub.cv;
504
378 if (CvDEPTH(cv)) 505 if (expect_true (CvDEPTH (cv)))
379 { 506 {
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); 507 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)); 508 PUSHs ((SV *)CvPADLIST (cv));
509 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 510 PUSHs ((SV *)cv);
396 511
397 get_padlist (cv); /* this is a monster */ 512 CvDEPTH (cv) = 0;
513 get_padlist (aTHX_ cv);
398 } 514 }
399 } 515 }
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 } 516 }
407 while (cxix >= 0);
408 517
409 if (top_si->si_type == PERLSI_MAIN) 518 if (expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 519 break;
411 520
412 top_si = top_si->si_prev; 521 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 522 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 523 cxix = top_si->si_cxix;
415 } 524 }
416 525
417 PUTBACK; 526 PUTBACK;
418 } 527 }
419 528
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 529 /* allocate some space on the context stack for our purposes */
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 530 /* we manually unroll here, as usually 2 slots is enough */
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 531 if (SLOT_COUNT >= 1) CXINC;
532 if (SLOT_COUNT >= 2) CXINC;
533 if (SLOT_COUNT >= 3) CXINC;
534 {
535 int i;
536 for (i = 3; i < SLOT_COUNT; ++i)
537 CXINC;
538 }
539 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 540
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; 541 c->mainstack = PL_mainstack;
434 c->stack_sp = PL_stack_sp; 542
435 c->op = PL_op; 543 {
436 c->curpad = PL_curpad; 544 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
437 c->stack_base = PL_stack_base; 545
438 c->stack_max = PL_stack_max; 546 slot->defav = GvAV (PL_defgv);
439 c->tmps_stack = PL_tmps_stack; 547 slot->defsv = DEFSV;
440 c->tmps_floor = PL_tmps_floor; 548 slot->errsv = ERRSV;
441 c->tmps_ix = PL_tmps_ix; 549 slot->irsgv = GvSV (irsgv);
442 c->tmps_max = PL_tmps_max; 550
443 c->markstack = PL_markstack; 551 #define VAR(name,type) slot->name = PL_ ## name;
444 c->markstack_ptr = PL_markstack_ptr; 552 # include "state.h"
445 c->markstack_max = PL_markstack_max; 553 #undef VAR
446 c->scopestack = PL_scopestack; 554 }
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} 555}
459 556
460/* 557/*
461 * allocate various perl stacks. This is an exact copy 558 * allocate various perl stacks. This is an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 559 * of perl.c:init_stacks, except that it uses less memory
463 * on the assumption that coroutines do not usually need 560 * on the (sometimes correct) assumption that coroutines do
464 * a lot of stackspace. 561 * not usually need a lot of stackspace.
465 */ 562 */
466STATIC void 563#if CORO_PREFER_PERL_FUNCTIONS
564# define coro_init_stacks init_stacks
565#else
566static void
467coro_init_stacks (pTHX) 567coro_init_stacks (pTHX)
468{ 568{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 569 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 570 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 571 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 572 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 573
474 PL_stack_base = AvARRAY(PL_curstack); 574 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 575 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 576 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 577
478 New(50,PL_tmps_stack,96,SV*); 578 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 579 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 580 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 581 PL_tmps_max = 32;
482 582
483 New(54,PL_markstack,16,I32); 583 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 584 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 585 PL_markstack_max = PL_markstack + 16;
486 586
587#ifdef SET_MARK_OFFSET
487 SET_MARK_OFFSET; 588 SET_MARK_OFFSET;
589#endif
488 590
489 New(54,PL_scopestack,16,I32); 591 New(54,PL_scopestack,8,I32);
490 PL_scopestack_ix = 0; 592 PL_scopestack_ix = 0;
491 PL_scopestack_max = 16; 593 PL_scopestack_max = 8;
492 594
493 New(54,PL_savestack,96,ANY); 595 New(54,PL_savestack,24,ANY);
494 PL_savestack_ix = 0; 596 PL_savestack_ix = 0;
495 PL_savestack_max = 96; 597 PL_savestack_max = 24;
496 598
599#if !PERL_VERSION_ATLEAST (5,9,0)
497 New(54,PL_retstack,8,OP*); 600 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 601 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 602 PL_retstack_max = 4;
603#endif
500} 604}
605#endif
501 606
502/* 607/*
503 * destroy the stacks, the callchain etc... 608 * destroy the stacks, the callchain etc...
504 * still there is a memleak of 128 bytes...
505 */ 609 */
506STATIC void 610static void
507destroy_stacks(pTHX) 611coro_destroy_stacks (pTHX)
508{ 612{
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) 613 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 614 PL_curstackinfo = PL_curstackinfo->si_next;
519 615
520 while (PL_curstackinfo) 616 while (PL_curstackinfo)
521 { 617 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 618 PERL_SI *p = PL_curstackinfo->si_prev;
523 619
524 { 620 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); 621 SvREFCNT_dec (PL_curstackinfo->si_stack);
622
533 Safefree(PL_curstackinfo->si_cxstack); 623 Safefree (PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 624 Safefree (PL_curstackinfo);
535 PL_curstackinfo = p; 625 PL_curstackinfo = p;
536 } 626 }
537 627
538 Safefree(PL_tmps_stack); 628 Safefree (PL_tmps_stack);
539 Safefree(PL_markstack); 629 Safefree (PL_markstack);
540 Safefree(PL_scopestack); 630 Safefree (PL_scopestack);
541 Safefree(PL_savestack); 631 Safefree (PL_savestack);
632#if !PERL_VERSION_ATLEAST (5,9,0)
542 Safefree(PL_retstack); 633 Safefree (PL_retstack);
634#endif
543} 635}
636
637static size_t
638coro_rss (pTHX_ struct coro *coro)
639{
640 size_t rss = sizeof (*coro);
641
642 if (coro->mainstack)
643 {
644 perl_slots tmp_slot;
645 perl_slots *slot;
646
647 if (coro->flags & CF_RUNNING)
648 {
649 slot = &tmp_slot;
650
651 #define VAR(name,type) slot->name = PL_ ## name;
652 # include "state.h"
653 #undef VAR
654 }
655 else
656 slot = coro->slot;
657
658 rss += sizeof (slot->curstackinfo);
659 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
660 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
661 rss += slot->tmps_max * sizeof (SV *);
662 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
663 rss += slot->scopestack_max * sizeof (I32);
664 rss += slot->savestack_max * sizeof (ANY);
665
666#if !PERL_VERSION_ATLEAST (5,9,0)
667 rss += slot->retstack_max * sizeof (OP *);
668#endif
669 }
670
671 return rss;
672}
673
674/** coroutine stack handling ************************************************/
544 675
545static void 676static void
546allocate_stack (Coro__State ctx, int alloc) 677coro_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 */
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{ 678{
602 /* 679 /*
603 * emulate part of the perl startup here. 680 * emulate part of the perl startup here.
604 */ 681 */
682 coro_init_stacks (aTHX);
683
684 PL_runops = RUNOPS_DEFAULT;
685 PL_curcop = &PL_compiling;
686 PL_in_eval = EVAL_NULL;
687 PL_comppad = 0;
688 PL_curpm = 0;
689 PL_curpad = 0;
690 PL_localizing = 0;
691 PL_dirty = 0;
692 PL_restartop = 0;
693 PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
694 PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
695
696 GvSV (PL_defgv) = newSV (0);
697 GvAV (PL_defgv) = coro->args; coro->args = 0;
698 GvSV (PL_errgv) = newSV (0);
699 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
700 PL_rs = newSVsv (GvSV (irsgv));
701 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
702
703 {
704 dSP;
705 LOGOP myop;
706
707 Zero (&myop, 1, LOGOP);
708 myop.op_next = Nullop;
709 myop.op_flags = OPf_WANT_VOID;
710
711 PUSHMARK (SP);
712 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
713 PUTBACK;
714 PL_op = (OP *)&myop;
715 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
716 SPAGAIN;
717
718 /*
719 * now its very tricky. the "tail" of the next transfer might end up
720 * either in a new cctx, or an existing one.
721 * in case of an existing one we have to take care of whatever
722 * entersub and transfer do to the perl stack.
723 */
724 ENTER;
725 EXTEND (SP, 4);
726 PUSHs ((SV *)0); /* items */
727 PUSHs ((SV *)0); /* ix, set_stacklevel */
728 PUSHs ((SV *)(sp - PL_stack_base + 1)); /* ax */
729 PUSHs ((SV *)0); /* again */
730 PUTBACK;
731 }
732}
733
734static void
735coro_destroy (pTHX_ struct coro *coro)
736{
737 if (!IN_DESTRUCT)
738 {
739 /* restore all saved variables and stuff */
740 LEAVE_SCOPE (0);
741 assert (PL_tmps_floor == -1);
742
743 /* free all temporaries */
744 FREETMPS;
745 assert (PL_tmps_ix == -1);
746
747 /* unwind all extra stacks */
748 POPSTACK_TO (PL_mainstack);
749
750 /* unwind main stack */
751 dounwind (-1);
752 }
753
754 SvREFCNT_dec (GvSV (PL_defgv));
755 SvREFCNT_dec (GvAV (PL_defgv));
756 SvREFCNT_dec (GvSV (PL_errgv));
757 SvREFCNT_dec (PL_defoutgv);
758 SvREFCNT_dec (PL_rs);
759 SvREFCNT_dec (GvSV (irsgv));
760
761 SvREFCNT_dec (PL_diehook);
762 SvREFCNT_dec (PL_warnhook);
763
764 SvREFCNT_dec (coro->saved_deffh);
765 SvREFCNT_dec (coro->throw);
766
767 coro_destroy_stacks (aTHX);
768}
769
770static void
771free_coro_mortal (pTHX)
772{
773 if (expect_true (coro_mortal))
774 {
775 SvREFCNT_dec (coro_mortal);
776 coro_mortal = 0;
777 }
778}
779
780static int
781runops_trace (pTHX)
782{
783 COP *oldcop = 0;
784 int oldcxix = -2;
785 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
786 coro_cctx *cctx = coro->cctx;
787
788 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
789 {
790 PERL_ASYNC_CHECK ();
791
792 if (cctx->flags & CC_TRACE_ALL)
793 {
794 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
795 {
796 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
797 SV **bot, **top;
798 AV *av = newAV (); /* return values */
799 SV **cb;
800 dSP;
801
802 GV *gv = CvGV (cx->blk_sub.cv);
803 SV *fullname = sv_2mortal (newSV (0));
804 if (isGV (gv))
805 gv_efullname3 (fullname, gv, 0);
806
807 bot = PL_stack_base + cx->blk_oldsp + 1;
808 top = cx->blk_gimme == G_ARRAY ? SP + 1
809 : cx->blk_gimme == G_SCALAR ? bot + 1
810 : bot;
811
812 av_extend (av, top - bot);
813 while (bot < top)
814 av_push (av, SvREFCNT_inc (*bot++));
815
816 PL_runops = RUNOPS_DEFAULT;
817 ENTER;
818 SAVETMPS;
819 EXTEND (SP, 3);
820 PUSHMARK (SP);
821 PUSHs (&PL_sv_no);
822 PUSHs (fullname);
823 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
824 PUTBACK;
825 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
826 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
827 SPAGAIN;
828 FREETMPS;
829 LEAVE;
830 PL_runops = runops_trace;
831 }
832
833 if (oldcop != PL_curcop)
834 {
835 oldcop = PL_curcop;
836
837 if (PL_curcop != &PL_compiling)
838 {
839 SV **cb;
840
841 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
842 {
843 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
844
845 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
846 {
847 runops_proc_t old_runops = PL_runops;
848 dSP;
849 GV *gv = CvGV (cx->blk_sub.cv);
850 SV *fullname = sv_2mortal (newSV (0));
851
852 if (isGV (gv))
853 gv_efullname3 (fullname, gv, 0);
854
855 PL_runops = RUNOPS_DEFAULT;
856 ENTER;
857 SAVETMPS;
858 EXTEND (SP, 3);
859 PUSHMARK (SP);
860 PUSHs (&PL_sv_yes);
861 PUSHs (fullname);
862 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
863 PUTBACK;
864 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
865 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
866 SPAGAIN;
867 FREETMPS;
868 LEAVE;
869 PL_runops = runops_trace;
870 }
871
872 oldcxix = cxstack_ix;
873 }
874
875 if (cctx->flags & CC_TRACE_LINE)
876 {
877 dSP;
878
879 PL_runops = RUNOPS_DEFAULT;
880 ENTER;
881 SAVETMPS;
882 EXTEND (SP, 3);
883 PL_runops = RUNOPS_DEFAULT;
884 PUSHMARK (SP);
885 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
886 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
887 PUTBACK;
888 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
889 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
890 SPAGAIN;
891 FREETMPS;
892 LEAVE;
893 PL_runops = runops_trace;
894 }
895 }
896 }
897 }
898 }
899
900 TAINT_NOT;
901 return 0;
902}
903
904/* inject a fake call to Coro::State::_cctx_init into the execution */
905/* _cctx_init should be careful, as it could be called at almost any time */
906/* during execution of a perl program */
907static void NOINLINE
908cctx_prepare (pTHX_ coro_cctx *cctx)
909{
605 dSP; 910 dSP;
606 Coro__State ctx = (Coro__State)arg; 911 LOGOP myop;
607 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608 912
609 coro_init_stacks (aTHX); 913 PL_top_env = &PL_start_env;
610 JMPENV_BOOTSTRAP; 914
915 if (cctx->flags & CC_TRACE)
916 PL_runops = runops_trace;
917
918 Zero (&myop, 1, LOGOP);
919 myop.op_next = PL_op;
920 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
921
922 PUSHMARK (SP);
923 EXTEND (SP, 2);
924 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
925 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
926 PUTBACK;
927 PL_op = (OP *)&myop;
928 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611 SPAGAIN; 929 SPAGAIN;
930}
612 931
613 /*PL_curcop = 0;*/ 932/*
614 SvREFCNT_dec (GvAV (PL_defgv)); 933 * this is a _very_ stripped down perl interpreter ;)
615 GvAV (PL_defgv) = ctx->args; 934 */
935static void
936cctx_run (void *arg)
937{
938 dTHX;
616 939
617 if (ctx->stack) 940 /* cctx_run is the alternative tail of transfer(), so unlock here. */
618 { 941 UNLOCK;
619 ctx->cursp = 0;
620 942
621 PUSHMARK(SP); 943 /* we now skip the entersub that lead to transfer() */
622 PUTBACK; 944 PL_op = PL_op->op_next;
623 (void) call_sv (sub_init, G_VOID|G_NOARGS); 945
624 croak ("FATAL: CCTXT coroutine returned!"); 946 /* inject a fake subroutine call to cctx_init */
947 cctx_prepare (aTHX_ (coro_cctx *)arg);
948
949 /* somebody or something will hit me for both perl_run and PL_restartop */
950 PL_restartop = PL_op;
951 perl_run (PL_curinterp);
952
953 /*
954 * If perl-run returns we assume exit() was being called or the coro
955 * fell off the end, which seems to be the only valid (non-bug)
956 * reason for perl_run to return. We try to exit by jumping to the
957 * bootstrap-time "top" top_env, as we cannot restore the "main"
958 * coroutine as Coro has no such concept
959 */
960 PL_top_env = main_top_env;
961 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
962}
963
964static coro_cctx *
965cctx_new ()
966{
967 coro_cctx *cctx;
968 void *stack_start;
969 size_t stack_size;
970
971 ++cctx_count;
972
973 Newz (0, cctx, 1, coro_cctx);
974
975#if HAVE_MMAP
976 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
977 /* mmap supposedly does allocate-on-write for us */
978 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
979
980 if (cctx->sptr != (void *)-1)
981 {
982# if CORO_STACKGUARD
983 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
984# endif
985 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
986 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
987 cctx->flags |= CC_MAPPED;
625 } 988 }
626 else 989 else
627 { 990#endif
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 } 991 {
992 cctx->ssize = coro_stacksize * (long)sizeof (long);
993 New (0, cctx->sptr, coro_stacksize, long);
994
995 if (!cctx->sptr)
996 {
997 perror ("FATAL: unable to allocate stack for coroutine");
998 _exit (EXIT_FAILURE);
999 }
1000
1001 stack_start = cctx->sptr;
1002 stack_size = cctx->ssize;
1003 }
1004
1005 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1006 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1007
1008 return cctx;
651} 1009}
652 1010
653static void 1011static void
654continue_coro (void *arg) 1012cctx_destroy (coro_cctx *cctx)
655{ 1013{
656 /* 1014 if (!cctx)
657 * this is a _very_ stripped down perl interpreter ;) 1015 return;
658 */
659 Coro__State ctx = (Coro__State)arg;
660 1016
661 ctx->cursp = 0; 1017 --cctx_count;
662 PL_op = PL_op->op_next;
663 CALLRUNOPS(aTHX);
664 /*NORETURN*/
665 abort ();
666}
667 1018
668STATIC void 1019#if CORO_USE_VALGRIND
1020 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1021#endif
1022
1023#if HAVE_MMAP
1024 if (cctx->flags & CC_MAPPED)
1025 munmap (cctx->sptr, cctx->ssize);
1026 else
1027#endif
1028 Safefree (cctx->sptr);
1029
1030 Safefree (cctx);
1031}
1032
1033/* wether this cctx should be destructed */
1034#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1035
1036static coro_cctx *
1037cctx_get (pTHX_ int gimme)
1038{
1039 while (expect_true (cctx_first[gimme]))
1040 {
1041 coro_cctx *cctx = cctx_first[gimme];
1042 cctx_first[gimme] = cctx->next;
1043 --cctx_idle[gimme];
1044
1045 if (expect_true (!CCTX_EXPIRED (cctx)))
1046 return cctx;
1047
1048 cctx_destroy (cctx);
1049 }
1050
1051 assert (!gimme);
1052 return cctx_new ();
1053}
1054
1055static void
1056cctx_put (coro_cctx *cctx, int gimme)
1057{
1058 /* free another cctx if overlimit */
1059 if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
1060 {
1061 coro_cctx *first = cctx_first[gimme];
1062 cctx_first[gimme] = first->next;
1063 --cctx_idle[gimme];
1064
1065 cctx_destroy (first);
1066 }
1067
1068 ++cctx_idle[gimme];
1069 cctx->next = cctx_first[gimme];
1070 cctx_first[gimme] = cctx;
1071}
1072
1073/** coroutine switching *****************************************************/
1074
1075static void
1076transfer_check (pTHX_ struct coro *prev, struct coro *next)
1077{
1078 if (expect_true (prev != next))
1079 {
1080 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1081 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1082
1083 if (expect_false (next->flags & CF_RUNNING))
1084 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1085
1086 if (expect_false (next->flags & CF_DESTROYED))
1087 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1088
1089 if (
1090#if PERL_VERSION_ATLEAST (5,9,0)
1091 expect_false (PL_parser)
1092#else
1093 expect_false (PL_lex_state != LEX_NOTPARSING)
1094#endif
1095 )
1096 croak ("Coro::State::transfer called while parsing, but this is not supported");
1097 }
1098}
1099
1100/* always use the TRANSFER macro */
1101static void NOINLINE
669transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 1102transfer (pTHX_ struct coro *prev, struct coro *next)
670{ 1103{
671 dSP;
672 dSTACKLEVEL; 1104 dSTACKLEVEL;
673 1105
674 if (prev != next) 1106 /* sometimes transfer is only called to set idle_sp */
1107 if (expect_false (!next))
1108 {
1109 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1110 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
675 { 1111 }
676 if (next->mainstack) 1112 else if (expect_true (prev != next))
1113 {
1114 coro_cctx *prev__cctx;
1115
1116 if (expect_false (prev->flags & CF_NEW))
677 { 1117 {
678 SAVE (prev, flags); 1118 /* create a new empty context */
679 LOAD (next); 1119 Newz (0, prev->cctx, 1, coro_cctx);
680 1120 prev->flags &= ~CF_NEW;
681 /* mark this state as in-use */ 1121 prev->flags |= CF_RUNNING;
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 {
688 if (!prev->stack)
689 allocate_stack (prev, 0);
690 else if (prev->cursp != stacklevel
691 && prev->stack->usecnt > 1)
692 {
693 prev->gencnt = ++prev->stack->gencnt;
694 prev->stack->usecnt = 1;
695 }
696
697 /* has our stack been invalidated? */
698 if (next->stack && next->stack->gencnt != next->gencnt)
699 {
700 deallocate_stack (next);
701 allocate_stack (next, 1);
702 coro_create (&(next->stack->cctx),
703 continue_coro, (void *)next,
704 next->stack->sptr, labs (next->stack->ssize));
705 }
706
707 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
708 }
709
710 } 1122 }
711 else if (next->tmps_ix == -2) 1123
712 croak ("tried to transfer to running coroutine"); 1124 prev->flags &= ~CF_RUNNING;
1125 next->flags |= CF_RUNNING;
1126
1127 LOCK;
1128
1129 if (expect_false (next->flags & CF_NEW))
1130 {
1131 /* need to start coroutine */
1132 next->flags &= ~CF_NEW;
1133 /* first get rid of the old state */
1134 save_perl (aTHX_ prev);
1135 /* setup coroutine call */
1136 coro_setup (aTHX_ next);
1137 }
713 else 1138 else
714 { 1139 {
715 SAVE (prev, -1); /* first get rid of the old state */ 1140 /* coroutine already started */
1141 save_perl (aTHX_ prev);
1142 load_perl (aTHX_ next);
1143 }
716 1144
717 if (flags & TRANSFER_SAVE_CCTXT) 1145 prev__cctx = prev->cctx;
1146
1147 /* possibly "free" the cctx */
1148 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1149 {
1150 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1151 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1152
1153 prev->cctx = 0;
1154
1155 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1156 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1157 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1158 if (!next->cctx)
1159 next->cctx = cctx_get (aTHX_ next->gimme);
1160
1161 cctx_put (prev__cctx, prev->gimme);
1162 }
1163
1164 ++next->usecount;
1165
1166 if (expect_true (!next->cctx))
1167 next->cctx = cctx_get (aTHX_ next->gimme);
1168
1169 if (expect_false (prev__cctx != next->cctx))
1170 {
1171 prev__cctx->top_env = PL_top_env;
1172 PL_top_env = next->cctx->top_env;
1173 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1174 }
1175
1176 free_coro_mortal (aTHX);
1177 UNLOCK;
1178
1179 if (expect_false (prev->throw || next->throw))
1180 {
1181 struct coro *coro = SvSTATE (coro_current);
1182
1183 if (coro->throw)
718 { 1184 {
719 if (!prev->stack) 1185 SV *exception = coro->throw;
720 allocate_stack (prev, 0); 1186 coro->throw = 0;
721 1187 sv_setsv (ERRSV, exception);
722 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1188 croak (0);
723 {
724 setup_coro (next);
725
726 prev->stack->refcnt++;
727 prev->stack->usecnt++;
728 next->stack = prev->stack;
729 next->gencnt = prev->gencnt;
730 }
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 }
739 } 1189 }
740 else
741 setup_coro (next);
742 } 1190 }
743 } 1191 }
744
745 next->cursp = stacklevel;
746} 1192}
747 1193
1194struct transfer_args
1195{
1196 struct coro *prev, *next;
1197};
1198
1199#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1200#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1201
1202/** high level stuff ********************************************************/
1203
1204static int
1205coro_state_destroy (pTHX_ struct coro *coro)
1206{
1207 if (coro->flags & CF_DESTROYED)
1208 return 0;
1209
1210 coro->flags |= CF_DESTROYED;
1211
1212 if (coro->flags & CF_READY)
1213 {
1214 /* reduce nready, as destroying a ready coro effectively unreadies it */
1215 /* alternative: look through all ready queues and remove the coro */
1216 LOCK;
1217 --coro_nready;
1218 UNLOCK;
1219 }
1220 else
1221 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1222
1223 if (coro->mainstack && coro->mainstack != main_mainstack)
1224 {
1225 struct coro temp;
1226
1227 if (coro->flags & CF_RUNNING)
1228 croak ("FATAL: tried to destroy currently running coroutine");
1229
1230 save_perl (aTHX_ &temp);
1231 load_perl (aTHX_ coro);
1232
1233 coro_destroy (aTHX_ coro);
1234
1235 load_perl (aTHX_ &temp);
1236
1237 coro->slot = 0;
1238 }
1239
1240 cctx_destroy (coro->cctx);
1241 SvREFCNT_dec (coro->args);
1242
1243 if (coro->next) coro->next->prev = coro->prev;
1244 if (coro->prev) coro->prev->next = coro->next;
1245 if (coro == coro_first) coro_first = coro->next;
1246
1247 return 1;
1248}
1249
1250static int
1251coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1252{
1253 struct coro *coro = (struct coro *)mg->mg_ptr;
1254 mg->mg_ptr = 0;
1255
1256 coro->hv = 0;
1257
1258 if (--coro->refcnt < 0)
1259 {
1260 coro_state_destroy (aTHX_ coro);
1261 Safefree (coro);
1262 }
1263
1264 return 0;
1265}
1266
1267static int
1268coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1269{
1270 struct coro *coro = (struct coro *)mg->mg_ptr;
1271
1272 ++coro->refcnt;
1273
1274 return 0;
1275}
1276
1277static MGVTBL coro_state_vtbl = {
1278 0, 0, 0, 0,
1279 coro_state_free,
1280 0,
1281#ifdef MGf_DUP
1282 coro_state_dup,
1283#else
1284# define MGf_DUP 0
1285#endif
1286};
1287
1288static void
1289prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1290{
1291 ta->prev = SvSTATE (prev_sv);
1292 ta->next = SvSTATE (next_sv);
1293 TRANSFER_CHECK (*ta);
1294}
1295
1296static void
1297api_transfer (SV *prev_sv, SV *next_sv)
1298{
1299 dTHX;
1300 struct transfer_args ta;
1301
1302 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1303 TRANSFER (ta);
1304}
1305
1306/** Coro ********************************************************************/
1307
1308static void
1309coro_enq (pTHX_ SV *coro_sv)
1310{
1311 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1312}
1313
1314static SV *
1315coro_deq (pTHX_ int min_prio)
1316{
1317 int prio = PRIO_MAX - PRIO_MIN;
1318
1319 min_prio -= PRIO_MIN;
1320 if (min_prio < 0)
1321 min_prio = 0;
1322
1323 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1324 if (AvFILLp (coro_ready [prio]) >= 0)
1325 return av_shift (coro_ready [prio]);
1326
1327 return 0;
1328}
1329
1330static int
1331api_ready (SV *coro_sv)
1332{
1333 dTHX;
1334 struct coro *coro;
1335
1336 if (SvROK (coro_sv))
1337 coro_sv = SvRV (coro_sv);
1338
1339 coro = SvSTATE (coro_sv);
1340
1341 if (coro->flags & CF_READY)
1342 return 0;
1343
1344 coro->flags |= CF_READY;
1345
1346 LOCK;
1347 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1348 ++coro_nready;
1349 UNLOCK;
1350
1351 return 1;
1352}
1353
1354static int
1355api_is_ready (SV *coro_sv)
1356{
1357 dTHX;
1358 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1359}
1360
1361static void
1362prepare_schedule (pTHX_ struct transfer_args *ta)
1363{
1364 SV *prev_sv, *next_sv;
1365
1366 for (;;)
1367 {
1368 LOCK;
1369 next_sv = coro_deq (aTHX_ PRIO_MIN);
1370
1371 /* nothing to schedule: call the idle handler */
1372 if (expect_false (!next_sv))
1373 {
1374 dSP;
1375 UNLOCK;
1376
1377 ENTER;
1378 SAVETMPS;
1379
1380 PUSHMARK (SP);
1381 PUTBACK;
1382 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1383
1384 FREETMPS;
1385 LEAVE;
1386 continue;
1387 }
1388
1389 ta->next = SvSTATE (next_sv);
1390
1391 /* cannot transfer to destroyed coros, skip and look for next */
1392 if (expect_false (ta->next->flags & CF_DESTROYED))
1393 {
1394 UNLOCK;
1395 SvREFCNT_dec (next_sv);
1396 /* coro_nready is already taken care of by destroy */
1397 continue;
1398 }
1399
1400 --coro_nready;
1401 UNLOCK;
1402 break;
1403 }
1404
1405 /* free this only after the transfer */
1406 prev_sv = SvRV (coro_current);
1407 ta->prev = SvSTATE (prev_sv);
1408 TRANSFER_CHECK (*ta);
1409 assert (ta->next->flags & CF_READY);
1410 ta->next->flags &= ~CF_READY;
1411 SvRV_set (coro_current, next_sv);
1412
1413 LOCK;
1414 free_coro_mortal (aTHX);
1415 coro_mortal = prev_sv;
1416 UNLOCK;
1417}
1418
1419static void
1420prepare_cede (pTHX_ struct transfer_args *ta)
1421{
1422 api_ready (coro_current);
1423 prepare_schedule (aTHX_ ta);
1424}
1425
1426static int
1427prepare_cede_notself (pTHX_ struct transfer_args *ta)
1428{
1429 if (coro_nready)
1430 {
1431 SV *prev = SvRV (coro_current);
1432 prepare_schedule (aTHX_ ta);
1433 api_ready (prev);
1434 return 1;
1435 }
1436 else
1437 return 0;
1438}
1439
1440static void
1441api_schedule (void)
1442{
1443 dTHX;
1444 struct transfer_args ta;
1445
1446 prepare_schedule (aTHX_ &ta);
1447 TRANSFER (ta);
1448}
1449
1450static int
1451api_cede (void)
1452{
1453 dTHX;
1454 struct transfer_args ta;
1455
1456 prepare_cede (aTHX_ &ta);
1457
1458 if (expect_true (ta.prev != ta.next))
1459 {
1460 TRANSFER (ta);
1461 return 1;
1462 }
1463 else
1464 return 0;
1465}
1466
1467static int
1468api_cede_notself (void)
1469{
1470 dTHX;
1471 struct transfer_args ta;
1472
1473 if (prepare_cede_notself (aTHX_ &ta))
1474 {
1475 TRANSFER (ta);
1476 return 1;
1477 }
1478 else
1479 return 0;
1480}
1481
1482static void
1483api_trace (SV *coro_sv, int flags)
1484{
1485 dTHX;
1486 struct coro *coro = SvSTATE (coro_sv);
1487
1488 if (flags & CC_TRACE)
1489 {
1490 if (!coro->cctx)
1491 coro->cctx = cctx_new ();
1492 else if (!(coro->cctx->flags & CC_TRACE))
1493 croak ("cannot enable tracing on coroutine with custom stack");
1494
1495 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1496 }
1497 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1498 {
1499 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1500
1501 if (coro->flags & CF_RUNNING)
1502 PL_runops = RUNOPS_DEFAULT;
1503 else
1504 coro->slot->runops = RUNOPS_DEFAULT;
1505 }
1506}
1507
748MODULE = Coro::State PACKAGE = Coro::State 1508MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749 1509
750PROTOTYPES: ENABLE 1510PROTOTYPES: DISABLE
751 1511
752BOOT: 1512BOOT:
753{ /* {} necessary for stoopid perl-5.6.x */ 1513{
754 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1514#ifdef USE_ITHREADS
755 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1515 MUTEX_INIT (&coro_mutex);
1516#endif
1517 BOOT_PAGESIZE;
1518
1519 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1520 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1521
1522 hv_sig = coro_get_hv ("SIG", TRUE);
1523 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
1524 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
1525
1526 if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
1527 if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
1528
756 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1529 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757 1530
758 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1531 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1532 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1533 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1534 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763 if (!padlist_cache)
764 padlist_cache = newHV ();
765 1535
766 main_mainstack = PL_mainstack; 1536 main_mainstack = PL_mainstack;
767} 1537 main_top_env = PL_top_env;
768 1538
769Coro::State 1539 while (main_top_env->je_prev)
770_newprocess(args) 1540 main_top_env = main_top_env->je_prev;
771 SV * args 1541
772 PROTOTYPE: $ 1542 coroapi.ver = CORO_API_VERSION;
1543 coroapi.transfer = api_transfer;
1544
1545 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1546}
1547
1548SV *
1549new (char *klass, ...)
773 CODE: 1550 CODE:
774 Coro__State coro; 1551{
1552 struct coro *coro;
1553 HV *hv;
1554 int i;
775 1555
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); 1556 Newz (0, coro, 1, struct coro);
1557 coro->args = newAV ();
1558 coro->flags = CF_NEW;
780 1559
781 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1560 if (coro_first) coro_first->prev = coro;
782 coro->mainstack = 0; /* actual work is done inside transfer */ 1561 coro->next = coro_first;
783 coro->stack = 0; 1562 coro_first = coro;
784 1563
785 RETVAL = coro; 1564 coro->hv = hv = newHV ();
1565 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1566 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1567
1568 av_extend (coro->args, items - 1);
1569 for (i = 1; i < items; i++)
1570 av_push (coro->args, newSVsv (ST (i)));
1571}
786 OUTPUT: 1572 OUTPUT:
787 RETVAL 1573 RETVAL
788 1574
1575# these not obviously related functions are all rolled into the same xs
1576# function to increase chances that they all will call transfer with the same
1577# stack offset
789void 1578void
790transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1579_set_stacklevel (...)
791 Coro::State_or_hashref prev 1580 ALIAS:
792 Coro::State_or_hashref next 1581 Coro::State::transfer = 1
793 int flags 1582 Coro::schedule = 2
794 PROTOTYPE: @ 1583 Coro::cede = 3
1584 Coro::cede_notself = 4
1585 Coro::Event::next = 5
1586 Coro::Event::next_cancel = 6
795 CODE: 1587 PPCODE:
796 transfer (aTHX_ prev, next, flags); 1588{
1589 struct transfer_args ta;
1590 int again = 0;
1591
1592 do
1593 {
1594 switch (ix)
1595 {
1596 case 0:
1597 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1598 ta.next = 0;
1599 break;
1600
1601 case 1:
1602 if (items != 2)
1603 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1604
1605 prepare_transfer (aTHX_ &ta, ST(0), ST(1));
1606 break;
1607
1608 case 2:
1609 prepare_schedule (aTHX_ &ta);
1610 break;
1611
1612 case 3:
1613 prepare_cede (aTHX_ &ta);
1614 break;
1615
1616 case 4:
1617 if (!prepare_cede_notself (aTHX_ &ta))
1618 XSRETURN_EMPTY;
1619
1620 break;
1621
1622 case 5:
1623 case 6:
1624 if (items != 1)
1625 croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
1626
1627 {
1628 SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
1629
1630 if (ev)
1631 {
1632 if (GIMME_V != G_VOID)
1633 {
1634 XPUSHs (ev);
1635 XSRETURN (1);
1636 }
1637 else
1638 XSRETURN_EMPTY;
1639 }
1640 }
1641
1642 prepare_schedule (aTHX_ &ta);
1643 again = 1;
1644 break;
1645 }
1646
1647 /* our caller, entersub, caches *only* this value */
1648 ta.prev->gimme = GIMME_V == G_VOID ? 0
1649 : GIMME_V == G_SCALAR ? 1
1650 : 2;
1651
1652 /* we need to save all local variables, as we might execute a different coroutine when transfer returns */
1653 sp += 2; /* save args */
1654 EXTEND (SP, 4);
1655 PUSHs ((SV *)(intptr_t)items);
1656 PUSHs ((SV *)(intptr_t)ix);
1657 PUSHs ((SV *)(intptr_t)ax);
1658 PUSHs ((SV *)(intptr_t)again);
1659 PUTBACK;
1660 BARRIER;
1661 TRANSFER (ta);
1662 BARRIER;
1663 SPAGAIN;
1664 again = (intptr_t)POPs;
1665 ax = (intptr_t)POPs;
1666 ix = (intptr_t)POPs;
1667 items = (intptr_t)POPs;
1668 sp -= 2; /* restore args */
1669 }
1670 while (again);
1671
1672 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1673 XSRETURN_YES;
1674
1675 XSRETURN_EMPTY; /* not understood why this is necessary, likely some stack handling bug */
1676}
1677
1678bool
1679_destroy (SV *coro_sv)
1680 CODE:
1681 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1682 OUTPUT:
1683 RETVAL
797 1684
798void 1685void
799DESTROY(coro) 1686_exit (code)
800 Coro::State coro 1687 int code
801 CODE: 1688 PROTOTYPE: $
1689 CODE:
1690 _exit (code);
802 1691
803 if (coro->mainstack && coro->mainstack != main_mainstack) 1692int
1693cctx_stacksize (int new_stacksize = 0)
1694 CODE:
1695 RETVAL = coro_stacksize;
1696 if (new_stacksize)
1697 coro_stacksize = new_stacksize;
1698 OUTPUT:
1699 RETVAL
1700
1701int
1702cctx_count ()
1703 CODE:
1704 RETVAL = cctx_count;
1705 OUTPUT:
1706 RETVAL
1707
1708int
1709cctx_idle ()
1710 CODE:
1711 RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
1712 OUTPUT:
1713 RETVAL
1714
1715void
1716list ()
1717 PPCODE:
1718{
1719 struct coro *coro;
1720 for (coro = coro_first; coro; coro = coro->next)
1721 if (coro->hv)
1722 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1723}
1724
1725void
1726call (Coro::State coro, SV *coderef)
1727 ALIAS:
1728 eval = 1
1729 CODE:
1730{
1731 if (coro->mainstack)
804 { 1732 {
805 struct coro temp; 1733 struct coro temp;
806 1734
807 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1735 if (!(coro->flags & CF_RUNNING))
808 LOAD(aTHX_ coro); 1736 {
1737 save_perl (aTHX_ &temp);
1738 load_perl (aTHX_ coro);
1739 }
809 1740
810 destroy_stacks (aTHX); 1741 {
1742 dSP;
1743 ENTER;
1744 SAVETMPS;
1745 PUTBACK;
1746 PUSHSTACK;
1747 PUSHMARK (SP);
811 1748
812 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1749 if (ix)
1750 eval_sv (coderef, 0);
1751 else
1752 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
813 1753
814 coro->mainstack = 0; 1754 POPSTACK;
1755 FREETMPS;
1756 LEAVE;
1757 }
1758
1759 if (!(coro->flags & CF_RUNNING))
1760 {
1761 save_perl (aTHX_ coro);
1762 load_perl (aTHX_ &temp);
1763 }
815 } 1764 }
1765}
816 1766
817 deallocate_stack (coro); 1767SV *
818 1768is_ready (Coro::State coro)
819 Safefree (coro); 1769 PROTOTYPE: $
1770 ALIAS:
1771 is_ready = CF_READY
1772 is_running = CF_RUNNING
1773 is_new = CF_NEW
1774 is_destroyed = CF_DESTROYED
1775 CODE:
1776 RETVAL = boolSV (coro->flags & ix);
1777 OUTPUT:
1778 RETVAL
820 1779
821void 1780void
822flush() 1781api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1782
1783SV *
1784has_stack (Coro::State coro)
1785 PROTOTYPE: $
823 CODE: 1786 CODE:
824#ifdef MAY_FLUSH 1787 RETVAL = boolSV (!!coro->cctx);
825 flush_padlist_cache (); 1788 OUTPUT:
826#endif 1789 RETVAL
827 1790
1791int
1792is_traced (Coro::State coro)
1793 PROTOTYPE: $
1794 CODE:
1795 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1796 OUTPUT:
1797 RETVAL
1798
1799IV
1800rss (Coro::State coro)
1801 PROTOTYPE: $
1802 ALIAS:
1803 usecount = 1
1804 CODE:
1805 switch (ix)
1806 {
1807 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1808 case 1: RETVAL = coro->usecount; break;
1809 }
1810 OUTPUT:
1811 RETVAL
1812
1813
828MODULE = Coro::State PACKAGE = Coro::Cont 1814MODULE = Coro::State PACKAGE = Coro
829 1815
830# this is slightly dirty 1816BOOT:
1817{
1818 int i;
1819
1820 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
1821 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
1822 av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
1823
1824 coro_current = coro_get_sv ("Coro::current", FALSE);
1825 SvREADONLY_on (coro_current);
1826
1827 coro_stash = gv_stashpv ("Coro", TRUE);
1828
1829 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1830 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1831 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1832 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1833 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1834 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1835
1836 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1837 coro_ready[i] = newAV ();
1838
1839 {
1840 SV *sv = perl_get_sv ("Coro::API", TRUE);
1841 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1842
1843 coroapi.schedule = api_schedule;
1844 coroapi.cede = api_cede;
1845 coroapi.cede_notself = api_cede_notself;
1846 coroapi.ready = api_ready;
1847 coroapi.is_ready = api_is_ready;
1848 coroapi.nready = &coro_nready;
1849 coroapi.current = coro_current;
1850
1851 GCoroAPI = &coroapi;
1852 sv_setiv (sv, (IV)&coroapi);
1853 SvREADONLY_on (sv);
1854 }
1855}
831 1856
832void 1857void
833yield(...) 1858_set_current (SV *current)
834 PROTOTYPE: @ 1859 PROTOTYPE: $
1860 CODE:
1861 SvREFCNT_dec (SvRV (coro_current));
1862 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1863
1864int
1865prio (Coro::State coro, int newprio = 0)
1866 ALIAS:
1867 nice = 1
835 CODE: 1868 CODE:
836 static SV *returnstk; 1869{
837 SV *sv; 1870 RETVAL = coro->prio;
1871
1872 if (items > 1)
1873 {
1874 if (ix)
1875 newprio = coro->prio - newprio;
1876
1877 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1878 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1879
1880 coro->prio = newprio;
1881 }
1882}
1883 OUTPUT:
1884 RETVAL
1885
1886SV *
1887ready (SV *self)
1888 PROTOTYPE: $
1889 CODE:
1890 RETVAL = boolSV (api_ready (self));
1891 OUTPUT:
1892 RETVAL
1893
1894int
1895nready (...)
1896 PROTOTYPE:
1897 CODE:
1898 RETVAL = coro_nready;
1899 OUTPUT:
1900 RETVAL
1901
1902void
1903throw (Coro::State self, SV *throw = &PL_sv_undef)
1904 PROTOTYPE: $;$
1905 CODE:
1906 SvREFCNT_dec (self->throw);
1907 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1908
1909# for async_pool speedup
1910void
1911_pool_1 (SV *cb)
1912 CODE:
1913{
1914 struct coro *coro = SvSTATE (coro_current);
1915 HV *hv = (HV *)SvRV (coro_current);
838 AV *defav = GvAV (PL_defgv); 1916 AV *defav = GvAV (PL_defgv);
839 struct coro *prev, *next; 1917 SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
1918 AV *invoke_av;
1919 int i, len;
840 1920
841 if (!returnstk) 1921 if (!invoke)
842 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1922 croak ("\3async_pool terminate\2\n");
843 1923
844 /* set up @_ -- ugly */ 1924 SvREFCNT_dec (coro->saved_deffh);
845 av_clear (defav); 1925 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1926
1927 hv_store (hv, "desc", sizeof ("desc") - 1,
1928 newSVpvn (strpair ("[async_pool]")), 0);
1929
1930 invoke_av = (AV *)SvRV (invoke);
1931 len = av_len (invoke_av);
1932
1933 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1934
1935 if (len > 0)
1936 {
846 av_fill (defav, items - 1); 1937 av_fill (defav, len - 1);
847 while (items--) 1938 for (i = 0; i < len; ++i)
848 av_store (defav, items, SvREFCNT_inc (ST(items))); 1939 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1940 }
849 1941
850 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
851 sv = av_pop ((AV *)SvRV (returnstk));
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); 1942 SvREFCNT_dec (invoke);
1943}
855 1944
856 transfer(aTHX_ prev, next, 0); 1945void
1946_pool_2 (SV *cb)
1947 CODE:
1948{
1949 struct coro *coro = SvSTATE (coro_current);
857 1950
1951 sv_setsv (cb, &PL_sv_undef);
1952
1953 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1954 coro->saved_deffh = 0;
1955
1956 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1957 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1958 croak ("\3async_pool terminate\2\n");
1959
1960 av_clear (GvAV (PL_defgv));
1961 hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
1962 newSVpvn (strpair ("[async_pool idle]")), 0);
1963
1964 coro->prio = 0;
1965
1966 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1967 api_trace (coro_current, 0);
1968
1969 av_push (av_async_pool, newSVsv (coro_current));
1970}
1971
1972
1973MODULE = Coro::State PACKAGE = Coro::AIO
1974
1975SV *
1976_get_state ()
1977 CODE:
1978{
1979 struct io_state *data;
1980
1981 RETVAL = newSV (sizeof (struct io_state));
1982 data = (struct io_state *)SvPVX (RETVAL);
1983 SvCUR_set (RETVAL, sizeof (struct io_state));
1984 SvPOK_only (RETVAL);
1985
1986 data->errorno = errno;
1987 data->laststype = PL_laststype;
1988 data->laststatval = PL_laststatval;
1989 data->statcache = PL_statcache;
1990}
1991 OUTPUT:
1992 RETVAL
1993
1994void
1995_set_state (char *data_)
1996 PROTOTYPE: $
1997 CODE:
1998{
1999 struct io_state *data = (void *)data_;
2000
2001 errno = data->errorno;
2002 PL_laststype = data->laststype;
2003 PL_laststatval = data->laststatval;
2004 PL_statcache = data->statcache;
2005}
2006

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