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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.210 by root, Wed Oct 10 03:24:40 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>
20# ifndef MAP_ANONYMOUS
21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
23# else
24# undef HAVE_MMAP
25# endif
10#endif 26# endif
11 27# include <limits.h>
12#define MAY_FLUSH /* increases codesize */ 28# ifndef PAGESIZE
13 29# define PAGESIZE pagesize
14/* perl-related */ 30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
15#define TRANSFER_SAVE_DEFAV 0x00000001 31static long pagesize;
16#define TRANSFER_SAVE_DEFSV 0x00000002 32# else
17#define TRANSFER_SAVE_ERRSV 0x00000004 33# define BOOT_PAGESIZE (void)0
18/* c-related */ 34# endif
19#define TRANSFER_SAVE_CCTXT 0x00000008
20#ifdef CORO_LAZY_STACK
21# define TRANSFER_LAZY_STACK 0x00000010
22#else 35#else
23# 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
24#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
25 76
26#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 77/* 5.8.7 */
27 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
28 81
29#define SUB_INIT "Coro::State::initialize" 82/* 5.8.8 */
30#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
31 89
32/* The next macro should delcare a variable stacklevel that contains and approximation 90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
33 * to the current C stack pointer. It's property is that it changes with each call 91# undef CORO_STACKGUARD
34 * 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
35#define dSTACKLEVEL void *stacklevel = &stacklevel 106#define STACKLEVEL ((void *)&stacklevel)
36 107
37#define labs(l) ((l) >= 0 ? (l) : -(l)) 108#define IN_DESTRUCT (PL_main_cv == Nullcv)
38 109
39/* 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 */
40typedef struct { 206typedef struct {
41 int refcnt; /* pointer reference counter */ 207 SV *defsv;
42 int usecnt; /* shared by how many coroutines */ 208 AV *defav;
43 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;
44 215
45 coro_context cctx; 216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46 217
47 void *sptr; 218/* this is a structure representing a perl-level coroutine */
48 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
50
51static coro_stack main_stack = { 1, 0, 0 };
52
53struct coro { 219struct coro {
54 /* the optional C context */ 220 /* the c coroutine allocated to this perl coroutine, if any */
55 coro_stack *stack; 221 coro_cctx *cctx;
56 void *cursp; 222 int gimme;
57 int gencnt;
58 223
59 /* optionally saved, might be zero */ 224 /* process data */
60 AV *defav;
61 SV *defsv;
62 SV *errsv;
63
64 /* saved global state not related to stacks */
65 U8 dowarn;
66
67 /* the stacks and related info (callchain etc..) */
68 PERL_SI *curstackinfo;
69 AV *curstack;
70 AV *mainstack; 225 AV *mainstack;
71 SV **stack_sp; 226 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV start_env;
94 JMPENV *top_env;
95 227
96 /* data associated with this coroutine (initial args) */ 228 AV *args; /* data associated with this coroutine (initial args) */
97 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;
98}; 245};
99 246
100typedef struct coro *Coro__State; 247typedef struct coro *Coro__State;
101typedef struct coro *Coro__State_or_hashref; 248typedef struct coro *Coro__State_or_hashref;
102 249
103static AV *main_mainstack; /* used to differentiate between $main and others */ 250/** Coro ********************************************************************/
104static HV *coro_state_stash;
105static SV *ucoro_state_sv;
106static U32 ucoro_state_hash;
107static HV *padlist_cache;
108 251
109/* mostly copied from op.c:cv_clone2 */ 252#define PRIO_MAX 3
110STATIC AV * 253#define PRIO_HIGH 1
111clone_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)
112{ 269{
113 AV *av; 270#if PERL_VERSION_ATLEAST (5,9,0)
114 I32 ix; 271 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 272 get_sv (name, create);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 273#endif
117 SV **pname = AvARRAY (protopad_name); 274 return get_sv (name, create);
118 SV **ppad = AvARRAY (protopad); 275}
119 I32 fname = AvFILLp (protopad_name); 276
120 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);
121 AV *newpadlist, *newpad_name, *newpad; 301 AV *newpadlist, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 302
132 newpadlist = newAV (); 303 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 304 AvREAL_off (newpadlist);
134 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)));
135 av_store (newpadlist, 1, (SV *) newpad); 314 av_store (newpadlist, 1, (SV *)newpad);
136 315
137 av = newAV (); /* will be @_ */ 316 return newpadlist;
138 av_extend (av, 0); 317}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 318
142 for (ix = fpad; ix > 0; ix--) 319static void
320free_padlist (pTHX_ AV *padlist)
321{
322 /* may be during global destruction */
323 if (SvREFCNT (padlist))
143 { 324 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 325 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 326 while (i >= 0)
146 { 327 {
147 char *name = SvPVX (namesv); /* XXX */ 328 SV **svp = av_fetch (padlist, i--, FALSE);
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 329 if (svp)
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 330 {
152 else
153 { /* our own lexical */
154 SV *sv; 331 SV *sv;
155 if (*name == '&') 332 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156 sv = SvREFCNT_inc (ppad[ix]); 333 SvREFCNT_dec (sv);
157 else if (*name == '@') 334
158 sv = (SV *) newAV (); 335 SvREFCNT_dec (*svp);
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 } 336 }
167 } 337 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179 338
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC AV *
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist); 339 SvREFCNT_dec ((SV*)padlist);
220 } 340 }
221} 341}
222#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))
223 394
224/* the next two functions merely cache the padlists */ 395/* the next two functions merely cache the padlists */
225STATIC void 396static void
226get_padlist (CV *cv) 397get_padlist (pTHX_ CV *cv)
227{ 398{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 399 MAGIC *mg = CORO_MAGIC (cv);
400 AV *av;
229 401
230 if (he && AvFILLp ((AV *)*he) >= 0) 402 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 403 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232 else 404 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 { 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;
243 SvREFCNT_dec (*he); 411 SvREFCNT_dec (cp);
244 *he = (SV *)newAV (); 412#else
413 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
414#endif
245 } 415 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248} 416}
249 417
250#ifdef MAY_FLUSH 418static void
251STATIC void 419put_padlist (pTHX_ CV *cv)
252flush_padlist_cache ()
253{ 420{
254 HV *hv = padlist_cache; 421 MAGIC *mg = CORO_MAGIC (cv);
255 padlist_cache = newHV (); 422 AV *av;
256 423
257 if (hv_iterinit (hv)) 424 if (expect_false (!mg))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 } 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 }
271 431
272 SvREFCNT_dec (hv); 432 av = (AV *)mg->mg_obj;
273}
274#endif
275 433
276#define SB do { 434 if (expect_false (AvFILLp (av) >= AvMAX (av)))
277#define SE } while (0) 435 av_extend (av, AvMAX (av) + 1);
278 436
279#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 437 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 438}
281 439
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 440/** load & save, init *******************************************************/
283 441
284static void 442static void
285load_state(pTHX_ Coro__State c) 443load_perl (pTHX_ Coro__State c)
286{ 444{
287 PL_dowarn = c->dowarn; 445 perl_slots *slot = c->slot;
446 c->slot = 0;
288 447
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 448 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_start_env = c->start_env;
315 PL_top_env = c->top_env;
316 449
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 450 GvSV (PL_defgv) = slot->defsv;
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 451 GvAV (PL_defgv) = slot->defav;
319 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);*/
320 461
321 { 462 {
322 dSP; 463 dSP;
464
323 CV *cv; 465 CV *cv;
324 466
325 /* now do the ugly restore mess */ 467 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 468 while (expect_true (cv = (CV *)POPs))
327 { 469 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 470 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 471 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 472 CvPADLIST (cv) = (AV *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 473 }
341 474
342 PUTBACK; 475 PUTBACK;
343 } 476 }
344} 477}
345 478
346static void 479static void
347save_state(pTHX_ Coro__State c, int flags) 480save_perl (pTHX_ Coro__State c)
348{ 481{
349 { 482 {
350 dSP; 483 dSP;
351 I32 cxix = cxstack_ix; 484 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 485 PERL_CONTEXT *ccstk = cxstack;
… …
355 /* 488 /*
356 * 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
357 * (and reinitialize) all cv's in the whole callchain :( 490 * (and reinitialize) all cv's in the whole callchain :(
358 */ 491 */
359 492
360 PUSHs (Nullsv); 493 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 494 /* this loop was inspired by pp_caller */
362 for (;;) 495 for (;;)
363 { 496 {
364 do 497 while (expect_true (cxix >= 0))
365 { 498 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 499 PERL_CONTEXT *cx = &ccstk[cxix--];
367 500
368 if (CxTYPE(cx) == CXt_SUB) 501 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
369 { 502 {
370 CV *cv = cx->blk_sub.cv; 503 CV *cv = cx->blk_sub.cv;
504
371 if (CvDEPTH(cv)) 505 if (expect_true (CvDEPTH (cv)))
372 { 506 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 507 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 508 PUSHs ((SV *)CvPADLIST (cv));
509 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 510 PUSHs ((SV *)cv);
389 511
390 get_padlist (cv); /* this is a monster */ 512 CvDEPTH (cv) = 0;
513 get_padlist (aTHX_ cv);
391 } 514 }
392 } 515 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 516 }
400 while (cxix >= 0);
401 517
402 if (top_si->si_type == PERLSI_MAIN) 518 if (expect_true (top_si->si_type == PERLSI_MAIN))
403 break; 519 break;
404 520
405 top_si = top_si->si_prev; 521 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 522 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 523 cxix = top_si->si_cxix;
408 } 524 }
409 525
410 PUTBACK; 526 PUTBACK;
411 } 527 }
412 528
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 529 /* allocate some space on the context stack for our purposes */
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 530 /* we manually unroll here, as usually 2 slots is enough */
415 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 */
416 540
417 /* I have not the slightest idea of why av_reify is necessary */
418 /* but if it's missing the defav contents magically get replaced sometimes */
419 if (c->defav)
420 av_reify (c->defav);
421
422 c->dowarn = PL_dowarn;
423
424 c->curstackinfo = PL_curstackinfo;
425 c->curstack = PL_curstack;
426 c->mainstack = PL_mainstack; 541 c->mainstack = PL_mainstack;
427 c->stack_sp = PL_stack_sp; 542
428 c->op = PL_op; 543 {
429 c->curpad = PL_curpad; 544 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
430 c->stack_base = PL_stack_base; 545
431 c->stack_max = PL_stack_max; 546 slot->defav = GvAV (PL_defgv);
432 c->tmps_stack = PL_tmps_stack; 547 slot->defsv = DEFSV;
433 c->tmps_floor = PL_tmps_floor; 548 slot->errsv = ERRSV;
434 c->tmps_ix = PL_tmps_ix; 549 slot->irsgv = GvSV (irsgv);
435 c->tmps_max = PL_tmps_max; 550
436 c->markstack = PL_markstack; 551 #define VAR(name,type) slot->name = PL_ ## name;
437 c->markstack_ptr = PL_markstack_ptr; 552 # include "state.h"
438 c->markstack_max = PL_markstack_max; 553 #undef VAR
439 c->scopestack = PL_scopestack; 554 }
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->start_env = PL_start_env;
450 c->top_env = PL_top_env;
451} 555}
452 556
453/* 557/*
454 * allocate various perl stacks. This is an exact copy 558 * allocate various perl stacks. This is an exact copy
455 * of perl.c:init_stacks, except that it uses less memory 559 * of perl.c:init_stacks, except that it uses less memory
456 * on the assumption that coroutines do not usually need 560 * on the (sometimes correct) assumption that coroutines do
457 * a lot of stackspace. 561 * not usually need a lot of stackspace.
458 */ 562 */
459STATIC void 563#if CORO_PREFER_PERL_FUNCTIONS
564# define coro_init_stacks init_stacks
565#else
566static void
460coro_init_stacks (pTHX) 567coro_init_stacks (pTHX)
461{ 568{
462 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 569 PL_curstackinfo = new_stackinfo(32, 8);
463 PL_curstackinfo->si_type = PERLSI_MAIN; 570 PL_curstackinfo->si_type = PERLSI_MAIN;
464 PL_curstack = PL_curstackinfo->si_stack; 571 PL_curstack = PL_curstackinfo->si_stack;
465 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 572 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466 573
467 PL_stack_base = AvARRAY(PL_curstack); 574 PL_stack_base = AvARRAY(PL_curstack);
468 PL_stack_sp = PL_stack_base; 575 PL_stack_sp = PL_stack_base;
469 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 576 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470 577
471 New(50,PL_tmps_stack,96,SV*); 578 New(50,PL_tmps_stack,32,SV*);
472 PL_tmps_floor = -1; 579 PL_tmps_floor = -1;
473 PL_tmps_ix = -1; 580 PL_tmps_ix = -1;
474 PL_tmps_max = 96; 581 PL_tmps_max = 32;
475 582
476 New(54,PL_markstack,16,I32); 583 New(54,PL_markstack,16,I32);
477 PL_markstack_ptr = PL_markstack; 584 PL_markstack_ptr = PL_markstack;
478 PL_markstack_max = PL_markstack + 16; 585 PL_markstack_max = PL_markstack + 16;
479 586
587#ifdef SET_MARK_OFFSET
480 SET_MARK_OFFSET; 588 SET_MARK_OFFSET;
589#endif
481 590
482 New(54,PL_scopestack,16,I32); 591 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 592 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 593 PL_scopestack_max = 8;
485 594
486 New(54,PL_savestack,96,ANY); 595 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 596 PL_savestack_ix = 0;
488 PL_savestack_max = 96; 597 PL_savestack_max = 24;
489 598
599#if !PERL_VERSION_ATLEAST (5,9,0)
490 New(54,PL_retstack,8,OP*); 600 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 601 PL_retstack_ix = 0;
492 PL_retstack_max = 8; 602 PL_retstack_max = 4;
603#endif
493} 604}
605#endif
494 606
495/* 607/*
496 * destroy the stacks, the callchain etc... 608 * destroy the stacks, the callchain etc...
497 * still there is a memleak of 128 bytes...
498 */ 609 */
499STATIC void 610static void
500destroy_stacks(pTHX) 611coro_destroy_stacks (pTHX)
501{ 612{
502 /* is this ugly, I ask? */
503 while (PL_scopestack_ix)
504 LEAVE;
505
506 /* sure it is, but more important: is it correct?? :/ */
507 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508 FREETMPS;
509
510 while (PL_curstackinfo->si_next) 613 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 614 PL_curstackinfo = PL_curstackinfo->si_next;
512 615
513 while (PL_curstackinfo) 616 while (PL_curstackinfo)
514 { 617 {
515 PERL_SI *p = PL_curstackinfo->si_prev; 618 PERL_SI *p = PL_curstackinfo->si_prev;
516 619
517 { 620 if (!IN_DESTRUCT)
518 dSP;
519 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520 PUTBACK; /* possibly superfluous */
521 }
522
523 dounwind(-1);
524
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 621 SvREFCNT_dec (PL_curstackinfo->si_stack);
622
526 Safefree(PL_curstackinfo->si_cxstack); 623 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 624 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 625 PL_curstackinfo = p;
529 } 626 }
530 627
531 Safefree(PL_tmps_stack); 628 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 629 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 630 Safefree (PL_scopestack);
534 Safefree(PL_savestack); 631 Safefree (PL_savestack);
632#if !PERL_VERSION_ATLEAST (5,9,0)
535 Safefree(PL_retstack); 633 Safefree (PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#ifdef HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif 634#endif
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)
555 { 648 {
556 /*FIXME*//*D*//* reasonable stack size! */ 649 slot = &tmp_slot;
557 stack->ssize = -4096 * sizeof (long); 650
558 New (0, stack->sptr, 4096, long); 651 #define VAR(name,type) slot->name = PL_ ## name;
652 # include "state.h"
653 #undef VAR
559 } 654 }
560 }
561 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 {
578#ifdef HAVE_MMAP
579 if (stack->ssize > 0 && stack->sptr)
580 munmap (stack->sptr, stack->ssize);
581 else 655 else
582#else 656 slot = coro->slot;
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 }
587 else if (ctx->gencnt == stack->gencnt)
588 --stack->usecnt;
589 }
590}
591 657
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 ************************************************/
675
592static void 676static void
593setup_coro (void *arg) 677coro_setup (pTHX_ struct coro *coro)
594{ 678{
595 /* 679 /*
596 * emulate part of the perl startup here. 680 * emulate part of the perl startup here.
597 */ 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 /* this newly created coroutine might be run on an existing cctx which most
734 * likely was suspended in set_stacklevel, called from entersub.
735 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
736 * so we ENTER here for symmetry
737 */
738 ENTER;
739}
740
741static void
742coro_destroy (pTHX_ struct coro *coro)
743{
744 if (!IN_DESTRUCT)
745 {
746 /* restore all saved variables and stuff */
747 LEAVE_SCOPE (0);
748 assert (PL_tmps_floor == -1);
749
750 /* free all temporaries */
751 FREETMPS;
752 assert (PL_tmps_ix == -1);
753
754 /* unwind all extra stacks */
755 POPSTACK_TO (PL_mainstack);
756
757 /* unwind main stack */
758 dounwind (-1);
759 }
760
761 SvREFCNT_dec (GvSV (PL_defgv));
762 SvREFCNT_dec (GvAV (PL_defgv));
763 SvREFCNT_dec (GvSV (PL_errgv));
764 SvREFCNT_dec (PL_defoutgv);
765 SvREFCNT_dec (PL_rs);
766 SvREFCNT_dec (GvSV (irsgv));
767
768 SvREFCNT_dec (PL_diehook);
769 SvREFCNT_dec (PL_warnhook);
770
771 SvREFCNT_dec (coro->saved_deffh);
772 SvREFCNT_dec (coro->throw);
773
774 coro_destroy_stacks (aTHX);
775}
776
777static void
778free_coro_mortal (pTHX)
779{
780 if (expect_true (coro_mortal))
781 {
782 SvREFCNT_dec (coro_mortal);
783 coro_mortal = 0;
784 }
785}
786
787static int
788runops_trace (pTHX)
789{
790 COP *oldcop = 0;
791 int oldcxix = -2;
792 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
793 coro_cctx *cctx = coro->cctx;
794
795 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
796 {
797 PERL_ASYNC_CHECK ();
798
799 if (cctx->flags & CC_TRACE_ALL)
800 {
801 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
802 {
803 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
804 SV **bot, **top;
805 AV *av = newAV (); /* return values */
806 SV **cb;
807 dSP;
808
809 GV *gv = CvGV (cx->blk_sub.cv);
810 SV *fullname = sv_2mortal (newSV (0));
811 if (isGV (gv))
812 gv_efullname3 (fullname, gv, 0);
813
814 bot = PL_stack_base + cx->blk_oldsp + 1;
815 top = cx->blk_gimme == G_ARRAY ? SP + 1
816 : cx->blk_gimme == G_SCALAR ? bot + 1
817 : bot;
818
819 av_extend (av, top - bot);
820 while (bot < top)
821 av_push (av, SvREFCNT_inc (*bot++));
822
823 PL_runops = RUNOPS_DEFAULT;
824 ENTER;
825 SAVETMPS;
826 EXTEND (SP, 3);
827 PUSHMARK (SP);
828 PUSHs (&PL_sv_no);
829 PUSHs (fullname);
830 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
831 PUTBACK;
832 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
833 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
834 SPAGAIN;
835 FREETMPS;
836 LEAVE;
837 PL_runops = runops_trace;
838 }
839
840 if (oldcop != PL_curcop)
841 {
842 oldcop = PL_curcop;
843
844 if (PL_curcop != &PL_compiling)
845 {
846 SV **cb;
847
848 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
849 {
850 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
851
852 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
853 {
854 runops_proc_t old_runops = PL_runops;
855 dSP;
856 GV *gv = CvGV (cx->blk_sub.cv);
857 SV *fullname = sv_2mortal (newSV (0));
858
859 if (isGV (gv))
860 gv_efullname3 (fullname, gv, 0);
861
862 PL_runops = RUNOPS_DEFAULT;
863 ENTER;
864 SAVETMPS;
865 EXTEND (SP, 3);
866 PUSHMARK (SP);
867 PUSHs (&PL_sv_yes);
868 PUSHs (fullname);
869 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
870 PUTBACK;
871 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
872 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
873 SPAGAIN;
874 FREETMPS;
875 LEAVE;
876 PL_runops = runops_trace;
877 }
878
879 oldcxix = cxstack_ix;
880 }
881
882 if (cctx->flags & CC_TRACE_LINE)
883 {
884 dSP;
885
886 PL_runops = RUNOPS_DEFAULT;
887 ENTER;
888 SAVETMPS;
889 EXTEND (SP, 3);
890 PL_runops = RUNOPS_DEFAULT;
891 PUSHMARK (SP);
892 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
893 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
894 PUTBACK;
895 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
896 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
897 SPAGAIN;
898 FREETMPS;
899 LEAVE;
900 PL_runops = runops_trace;
901 }
902 }
903 }
904 }
905 }
906
907 TAINT_NOT;
908 return 0;
909}
910
911/* inject a fake call to Coro::State::_cctx_init into the execution */
912/* _cctx_init should be careful, as it could be called at almost any time */
913/* during execution of a perl program */
914static void NOINLINE
915cctx_prepare (pTHX_ coro_cctx *cctx)
916{
598 dSP; 917 dSP;
599 Coro__State ctx = (Coro__State)arg; 918 LOGOP myop;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601 919
602 coro_init_stacks (aTHX); 920 PL_top_env = &PL_start_env;
603 JMPENV_BOOTSTRAP; 921
922 if (cctx->flags & CC_TRACE)
923 PL_runops = runops_trace;
924
925 Zero (&myop, 1, LOGOP);
926 myop.op_next = PL_op;
927 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
928
929 PUSHMARK (SP);
930 EXTEND (SP, 2);
931 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
932 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
933 PUTBACK;
934 PL_op = (OP *)&myop;
935 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
604 SPAGAIN; 936 SPAGAIN;
937}
605 938
606 /*PL_curcop = 0;*/ 939/*
607 SvREFCNT_dec (GvAV (PL_defgv)); 940 * this is a _very_ stripped down perl interpreter ;)
608 GvAV (PL_defgv) = ctx->args; 941 */
942static void
943cctx_run (void *arg)
944{
945 dTHX;
609 946
610 if (ctx->stack) 947 /* cctx_run is the alternative tail of transfer(), so unlock here. */
611 { 948 UNLOCK;
612 ctx->cursp = 0;
613 949
614 PUSHMARK(SP); 950 /* we now skip the entersub that lead to transfer() */
615 PUTBACK; 951 PL_op = PL_op->op_next;
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 952
617 croak ("FATAL: CCTXT coroutine returned!"); 953 /* inject a fake subroutine call to cctx_init */
954 cctx_prepare (aTHX_ (coro_cctx *)arg);
955
956 /* somebody or something will hit me for both perl_run and PL_restartop */
957 PL_restartop = PL_op;
958 perl_run (PL_curinterp);
959
960 /*
961 * If perl-run returns we assume exit() was being called or the coro
962 * fell off the end, which seems to be the only valid (non-bug)
963 * reason for perl_run to return. We try to exit by jumping to the
964 * bootstrap-time "top" top_env, as we cannot restore the "main"
965 * coroutine as Coro has no such concept
966 */
967 PL_top_env = main_top_env;
968 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
969}
970
971static coro_cctx *
972cctx_new ()
973{
974 coro_cctx *cctx;
975 void *stack_start;
976 size_t stack_size;
977
978 ++cctx_count;
979
980 Newz (0, cctx, 1, coro_cctx);
981
982#if HAVE_MMAP
983 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
984 /* mmap supposedly does allocate-on-write for us */
985 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
986
987 if (cctx->sptr != (void *)-1)
988 {
989# if CORO_STACKGUARD
990 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
991# endif
992 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
993 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
994 cctx->flags |= CC_MAPPED;
618 } 995 }
619 else 996 else
620 { 997#endif
621 UNOP myop;
622
623 PL_op = (OP *)&myop;
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 } 998 {
644} 999 cctx->ssize = coro_stacksize * (long)sizeof (long);
1000 New (0, cctx->sptr, coro_stacksize, long);
645 1001
646static void 1002 if (!cctx->sptr)
647continue_coro (void *arg) 1003 {
648{ 1004 perror ("FATAL: unable to allocate stack for coroutine");
649 /* 1005 _exit (EXIT_FAILURE);
650 * this is a _very_ stripped down perl interpreter ;) 1006 }
651 */
652 Coro__State ctx = (Coro__State)arg;
653 1007
654 ctx->cursp = 0; 1008 stack_start = cctx->sptr;
655 PL_op = PL_op->op_next; 1009 stack_size = cctx->ssize;
656 CALLRUNOPS(aTHX); 1010 }
657 /*NORETURN*/
658 abort ();
659}
660 1011
661STATIC void 1012 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1013 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1014
1015 return cctx;
1016}
1017
1018static void
1019cctx_destroy (coro_cctx *cctx)
1020{
1021 if (!cctx)
1022 return;
1023
1024 --cctx_count;
1025
1026#if CORO_USE_VALGRIND
1027 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1028#endif
1029
1030#if HAVE_MMAP
1031 if (cctx->flags & CC_MAPPED)
1032 munmap (cctx->sptr, cctx->ssize);
1033 else
1034#endif
1035 Safefree (cctx->sptr);
1036
1037 Safefree (cctx);
1038}
1039
1040/* wether this cctx should be destructed */
1041#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1042
1043static coro_cctx *
1044cctx_get (pTHX_ int gimme)
1045{
1046 while (expect_true (cctx_first[gimme]))
1047 {
1048 coro_cctx *cctx = cctx_first[gimme];
1049 cctx_first[gimme] = cctx->next;
1050 --cctx_idle[gimme];
1051
1052 if (expect_true (!CCTX_EXPIRED (cctx)))
1053 return cctx;
1054
1055 cctx_destroy (cctx);
1056 }
1057
1058 assert (!gimme);
1059 return cctx_new ();
1060}
1061
1062static void
1063cctx_put (coro_cctx *cctx, int gimme)
1064{
1065 /* free another cctx if overlimit */
1066 if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
1067 {
1068 coro_cctx *first = cctx_first[gimme];
1069 cctx_first[gimme] = first->next;
1070 --cctx_idle[gimme];
1071
1072 cctx_destroy (first);
1073 }
1074
1075 ++cctx_idle[gimme];
1076 cctx->next = cctx_first[gimme];
1077 cctx_first[gimme] = cctx;
1078}
1079
1080/** coroutine switching *****************************************************/
1081
1082static void
1083transfer_check (pTHX_ struct coro *prev, struct coro *next)
1084{
1085 if (expect_true (prev != next))
1086 {
1087 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1088 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1089
1090 if (expect_false (next->flags & CF_RUNNING))
1091 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1092
1093 if (expect_false (next->flags & CF_DESTROYED))
1094 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1095
1096 if (
1097#if PERL_VERSION_ATLEAST (5,9,0)
1098 expect_false (PL_parser)
1099#else
1100 expect_false (PL_lex_state != LEX_NOTPARSING)
1101#endif
1102 )
1103 croak ("Coro::State::transfer called while parsing, but this is not supported");
1104 }
1105}
1106
1107/* always use the TRANSFER macro */
1108static void NOINLINE
662transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 1109transfer (pTHX_ struct coro *prev, struct coro *next)
663{ 1110{
664 dSP;
665 dSTACKLEVEL; 1111 dSTACKLEVEL;
666 1112
667 if (prev != next) 1113 /* sometimes transfer is only called to set idle_sp */
1114 if (expect_false (!next))
1115 {
1116 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1117 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
668 { 1118 }
669 if (next->mainstack) 1119 else if (expect_true (prev != next))
1120 {
1121 coro_cctx *prev__cctx;
1122
1123 if (expect_false (prev->flags & CF_NEW))
670 { 1124 {
671 SAVE (prev, flags); 1125 /* create a new empty context */
672 LOAD (next); 1126 Newz (0, prev->cctx, 1, coro_cctx);
673 1127 prev->flags &= ~CF_NEW;
674 /* mark this state as in-use */ 1128 prev->flags |= CF_RUNNING;
675 next->mainstack = 0;
676 next->tmps_ix = -2;
677
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 {
681 if (!prev->stack)
682 allocate_stack (prev, 0);
683 else if (prev->cursp != stacklevel
684 && prev->stack->usecnt > 1)
685 {
686 prev->gencnt = ++prev->stack->gencnt;
687 prev->stack->usecnt = 1;
688 }
689
690 /* has our stack been invalidated? */
691 if (next->stack && next->stack->gencnt != next->gencnt)
692 {
693 deallocate_stack (next);
694 allocate_stack (next, 1);
695 coro_create (&(next->stack->cctx),
696 continue_coro, (void *)next,
697 next->stack->sptr, labs (next->stack->ssize));
698 }
699
700 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
701 }
702
703 } 1129 }
704 else if (next->tmps_ix == -2) 1130
705 croak ("tried to transfer to running coroutine"); 1131 prev->flags &= ~CF_RUNNING;
1132 next->flags |= CF_RUNNING;
1133
1134 LOCK;
1135
1136 if (expect_false (next->flags & CF_NEW))
1137 {
1138 /* need to start coroutine */
1139 next->flags &= ~CF_NEW;
1140 /* first get rid of the old state */
1141 save_perl (aTHX_ prev);
1142 /* setup coroutine call */
1143 coro_setup (aTHX_ next);
1144 }
706 else 1145 else
707 { 1146 {
708 SAVE (prev, -1); /* first get rid of the old state */ 1147 /* coroutine already started */
1148 save_perl (aTHX_ prev);
1149 load_perl (aTHX_ next);
1150 }
709 1151
710 if (flags & TRANSFER_SAVE_CCTXT) 1152 prev__cctx = prev->cctx;
1153
1154 /* possibly "free" the cctx */
1155 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1156 {
1157 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1158 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1159
1160 prev->cctx = 0;
1161
1162 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1163 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1164 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1165 if (!next->cctx)
1166 next->cctx = cctx_get (aTHX_ next->gimme);
1167
1168 cctx_put (prev__cctx, prev->gimme);
1169 }
1170
1171 ++next->usecount;
1172
1173 if (expect_true (!next->cctx))
1174 next->cctx = cctx_get (aTHX_ next->gimme);
1175
1176 if (expect_false (prev__cctx != next->cctx))
1177 {
1178 prev__cctx->top_env = PL_top_env;
1179 PL_top_env = next->cctx->top_env;
1180 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1181 }
1182
1183 free_coro_mortal (aTHX);
1184 UNLOCK;
1185
1186 if (expect_false (prev->throw || next->throw))
1187 {
1188 struct coro *coro = SvSTATE (coro_current);
1189
1190 if (coro->throw)
711 { 1191 {
712 if (!prev->stack) 1192 SV *exception = coro->throw;
713 allocate_stack (prev, 0); 1193 coro->throw = 0;
714 1194 sv_setsv (ERRSV, exception);
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1195 croak (0);
716 {
717 setup_coro (next);
718
719 prev->stack->refcnt++;
720 prev->stack->usecnt++;
721 next->stack = prev->stack;
722 next->gencnt = prev->gencnt;
723 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 }
732 } 1196 }
733 else
734 setup_coro (next);
735 } 1197 }
736 } 1198 }
737
738 next->cursp = stacklevel;
739} 1199}
740 1200
1201struct transfer_args
1202{
1203 struct coro *prev, *next;
1204};
1205
1206#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1207#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1208
1209/** high level stuff ********************************************************/
1210
1211static int
1212coro_state_destroy (pTHX_ struct coro *coro)
1213{
1214 if (coro->flags & CF_DESTROYED)
1215 return 0;
1216
1217 coro->flags |= CF_DESTROYED;
1218
1219 if (coro->flags & CF_READY)
1220 {
1221 /* reduce nready, as destroying a ready coro effectively unreadies it */
1222 /* alternative: look through all ready queues and remove the coro */
1223 LOCK;
1224 --coro_nready;
1225 UNLOCK;
1226 }
1227 else
1228 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1229
1230 if (coro->mainstack && coro->mainstack != main_mainstack)
1231 {
1232 struct coro temp;
1233
1234 if (coro->flags & CF_RUNNING)
1235 croak ("FATAL: tried to destroy currently running coroutine");
1236
1237 save_perl (aTHX_ &temp);
1238 load_perl (aTHX_ coro);
1239
1240 coro_destroy (aTHX_ coro);
1241
1242 load_perl (aTHX_ &temp);
1243
1244 coro->slot = 0;
1245 }
1246
1247 cctx_destroy (coro->cctx);
1248 SvREFCNT_dec (coro->args);
1249
1250 if (coro->next) coro->next->prev = coro->prev;
1251 if (coro->prev) coro->prev->next = coro->next;
1252 if (coro == coro_first) coro_first = coro->next;
1253
1254 return 1;
1255}
1256
1257static int
1258coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1259{
1260 struct coro *coro = (struct coro *)mg->mg_ptr;
1261 mg->mg_ptr = 0;
1262
1263 coro->hv = 0;
1264
1265 if (--coro->refcnt < 0)
1266 {
1267 coro_state_destroy (aTHX_ coro);
1268 Safefree (coro);
1269 }
1270
1271 return 0;
1272}
1273
1274static int
1275coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1276{
1277 struct coro *coro = (struct coro *)mg->mg_ptr;
1278
1279 ++coro->refcnt;
1280
1281 return 0;
1282}
1283
1284static MGVTBL coro_state_vtbl = {
1285 0, 0, 0, 0,
1286 coro_state_free,
1287 0,
1288#ifdef MGf_DUP
1289 coro_state_dup,
1290#else
1291# define MGf_DUP 0
1292#endif
1293};
1294
1295static void
1296prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1297{
1298 ta->prev = SvSTATE (prev_sv);
1299 ta->next = SvSTATE (next_sv);
1300 TRANSFER_CHECK (*ta);
1301}
1302
1303static void
1304api_transfer (SV *prev_sv, SV *next_sv)
1305{
1306 dTHX;
1307 struct transfer_args ta;
1308
1309 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1310 TRANSFER (ta);
1311}
1312
1313/** Coro ********************************************************************/
1314
1315static void
1316coro_enq (pTHX_ SV *coro_sv)
1317{
1318 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1319}
1320
1321static SV *
1322coro_deq (pTHX_ int min_prio)
1323{
1324 int prio = PRIO_MAX - PRIO_MIN;
1325
1326 min_prio -= PRIO_MIN;
1327 if (min_prio < 0)
1328 min_prio = 0;
1329
1330 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1331 if (AvFILLp (coro_ready [prio]) >= 0)
1332 return av_shift (coro_ready [prio]);
1333
1334 return 0;
1335}
1336
1337static int
1338api_ready (SV *coro_sv)
1339{
1340 dTHX;
1341 struct coro *coro;
1342
1343 if (SvROK (coro_sv))
1344 coro_sv = SvRV (coro_sv);
1345
1346 coro = SvSTATE (coro_sv);
1347
1348 if (coro->flags & CF_READY)
1349 return 0;
1350
1351 coro->flags |= CF_READY;
1352
1353 LOCK;
1354 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1355 ++coro_nready;
1356 UNLOCK;
1357
1358 return 1;
1359}
1360
1361static int
1362api_is_ready (SV *coro_sv)
1363{
1364 dTHX;
1365 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1366}
1367
1368static void
1369prepare_schedule (pTHX_ struct transfer_args *ta)
1370{
1371 SV *prev_sv, *next_sv;
1372
1373 for (;;)
1374 {
1375 LOCK;
1376 next_sv = coro_deq (aTHX_ PRIO_MIN);
1377
1378 /* nothing to schedule: call the idle handler */
1379 if (expect_false (!next_sv))
1380 {
1381 dSP;
1382 UNLOCK;
1383
1384 ENTER;
1385 SAVETMPS;
1386
1387 PUSHMARK (SP);
1388 PUTBACK;
1389 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1390
1391 FREETMPS;
1392 LEAVE;
1393 continue;
1394 }
1395
1396 ta->next = SvSTATE (next_sv);
1397
1398 /* cannot transfer to destroyed coros, skip and look for next */
1399 if (expect_false (ta->next->flags & CF_DESTROYED))
1400 {
1401 UNLOCK;
1402 SvREFCNT_dec (next_sv);
1403 /* coro_nready is already taken care of by destroy */
1404 continue;
1405 }
1406
1407 --coro_nready;
1408 UNLOCK;
1409 break;
1410 }
1411
1412 /* free this only after the transfer */
1413 prev_sv = SvRV (coro_current);
1414 ta->prev = SvSTATE (prev_sv);
1415 TRANSFER_CHECK (*ta);
1416 assert (ta->next->flags & CF_READY);
1417 ta->next->flags &= ~CF_READY;
1418 SvRV_set (coro_current, next_sv);
1419
1420 LOCK;
1421 free_coro_mortal (aTHX);
1422 coro_mortal = prev_sv;
1423 UNLOCK;
1424}
1425
1426static void
1427prepare_cede (pTHX_ struct transfer_args *ta)
1428{
1429 api_ready (coro_current);
1430 prepare_schedule (aTHX_ ta);
1431}
1432
1433static int
1434prepare_cede_notself (pTHX_ struct transfer_args *ta)
1435{
1436 if (coro_nready)
1437 {
1438 SV *prev = SvRV (coro_current);
1439 prepare_schedule (aTHX_ ta);
1440 api_ready (prev);
1441 return 1;
1442 }
1443 else
1444 return 0;
1445}
1446
1447static void
1448api_schedule (void)
1449{
1450 dTHX;
1451 struct transfer_args ta;
1452
1453 prepare_schedule (aTHX_ &ta);
1454 TRANSFER (ta);
1455}
1456
1457static int
1458api_cede (void)
1459{
1460 dTHX;
1461 struct transfer_args ta;
1462
1463 prepare_cede (aTHX_ &ta);
1464
1465 if (expect_true (ta.prev != ta.next))
1466 {
1467 TRANSFER (ta);
1468 return 1;
1469 }
1470 else
1471 return 0;
1472}
1473
1474static int
1475api_cede_notself (void)
1476{
1477 dTHX;
1478 struct transfer_args ta;
1479
1480 if (prepare_cede_notself (aTHX_ &ta))
1481 {
1482 TRANSFER (ta);
1483 return 1;
1484 }
1485 else
1486 return 0;
1487}
1488
1489static void
1490api_trace (SV *coro_sv, int flags)
1491{
1492 dTHX;
1493 struct coro *coro = SvSTATE (coro_sv);
1494
1495 if (flags & CC_TRACE)
1496 {
1497 if (!coro->cctx)
1498 coro->cctx = cctx_new ();
1499 else if (!(coro->cctx->flags & CC_TRACE))
1500 croak ("cannot enable tracing on coroutine with custom stack");
1501
1502 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1503 }
1504 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1505 {
1506 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1507
1508 if (coro->flags & CF_RUNNING)
1509 PL_runops = RUNOPS_DEFAULT;
1510 else
1511 coro->slot->runops = RUNOPS_DEFAULT;
1512 }
1513}
1514
741MODULE = Coro::State PACKAGE = Coro::State 1515MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 1516
743PROTOTYPES: ENABLE 1517PROTOTYPES: DISABLE
744 1518
745BOOT: 1519BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 1520{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1521#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1522 MUTEX_INIT (&coro_mutex);
1523#endif
1524 BOOT_PAGESIZE;
1525
1526 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1527 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1528
1529 hv_sig = coro_get_hv ("SIG", TRUE);
1530 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
1531 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
1532
1533 if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
1534 if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
1535
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1536 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 1537
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1538 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1539 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1540 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1541 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 1542
759 main_mainstack = PL_mainstack; 1543 main_mainstack = PL_mainstack;
760} 1544 main_top_env = PL_top_env;
761 1545
762Coro::State 1546 while (main_top_env->je_prev)
763_newprocess(args) 1547 main_top_env = main_top_env->je_prev;
764 SV * args 1548
765 PROTOTYPE: $ 1549 coroapi.ver = CORO_API_VERSION;
1550 coroapi.rev = CORO_API_REVISION;
1551 coroapi.transfer = api_transfer;
1552
1553 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1554}
1555
1556SV *
1557new (char *klass, ...)
766 CODE: 1558 CODE:
767 Coro__State coro; 1559{
1560 struct coro *coro;
1561 HV *hv;
1562 int i;
768 1563
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
770 croak ("Coro::State::_newprocess expects an arrayref");
771
772 New (0, coro, 1, struct coro); 1564 Newz (0, coro, 1, struct coro);
1565 coro->args = newAV ();
1566 coro->flags = CF_NEW;
773 1567
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1568 if (coro_first) coro_first->prev = coro;
775 coro->mainstack = 0; /* actual work is done inside transfer */ 1569 coro->next = coro_first;
776 coro->stack = 0; 1570 coro_first = coro;
777 1571
778 RETVAL = coro; 1572 coro->hv = hv = newHV ();
1573 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1574 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1575
1576 av_extend (coro->args, items - 1);
1577 for (i = 1; i < items; i++)
1578 av_push (coro->args, newSVsv (ST (i)));
1579}
779 OUTPUT: 1580 OUTPUT:
780 RETVAL 1581 RETVAL
781 1582
1583# these not obviously related functions are all rolled into the same xs
1584# function to increase chances that they all will call transfer with the same
1585# stack offset
782void 1586void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1587_set_stacklevel (...)
784 Coro::State_or_hashref prev 1588 ALIAS:
785 Coro::State_or_hashref next 1589 Coro::State::transfer = 1
786 int flags 1590 Coro::schedule = 2
787 PROTOTYPE: @ 1591 Coro::cede = 3
1592 Coro::cede_notself = 4
788 CODE: 1593 CODE:
789 transfer (aTHX_ prev, next, flags); 1594{
1595 struct transfer_args ta;
1596
1597 switch (ix)
1598 {
1599 case 0:
1600 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1601 ta.next = 0;
1602 break;
1603
1604 case 1:
1605 if (items != 2)
1606 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1607
1608 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1609 break;
1610
1611 case 2:
1612 prepare_schedule (aTHX_ &ta);
1613 break;
1614
1615 case 3:
1616 prepare_cede (aTHX_ &ta);
1617 break;
1618
1619 case 4:
1620 if (!prepare_cede_notself (aTHX_ &ta))
1621 XSRETURN_EMPTY;
1622
1623 break;
1624 }
1625
1626 BARRIER;
1627 PUTBACK;
1628 TRANSFER (ta);
1629 SPAGAIN; /* might be the sp of a different coroutine now */
1630 /* be extra careful not to ever do anything after TRANSFER */
1631}
1632
1633bool
1634_destroy (SV *coro_sv)
1635 CODE:
1636 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1637 OUTPUT:
1638 RETVAL
790 1639
791void 1640void
792DESTROY(coro) 1641_exit (code)
793 Coro::State coro 1642 int code
794 CODE: 1643 PROTOTYPE: $
1644 CODE:
1645 _exit (code);
795 1646
796 if (coro->mainstack && coro->mainstack != main_mainstack) 1647int
1648cctx_stacksize (int new_stacksize = 0)
1649 CODE:
1650 RETVAL = coro_stacksize;
1651 if (new_stacksize)
1652 coro_stacksize = new_stacksize;
1653 OUTPUT:
1654 RETVAL
1655
1656int
1657cctx_count ()
1658 CODE:
1659 RETVAL = cctx_count;
1660 OUTPUT:
1661 RETVAL
1662
1663int
1664cctx_idle ()
1665 CODE:
1666 RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
1667 OUTPUT:
1668 RETVAL
1669
1670void
1671list ()
1672 PPCODE:
1673{
1674 struct coro *coro;
1675 for (coro = coro_first; coro; coro = coro->next)
1676 if (coro->hv)
1677 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1678}
1679
1680void
1681call (Coro::State coro, SV *coderef)
1682 ALIAS:
1683 eval = 1
1684 CODE:
1685{
1686 if (coro->mainstack)
797 { 1687 {
798 struct coro temp; 1688 struct coro temp;
799 1689
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1690 if (!(coro->flags & CF_RUNNING))
801 LOAD(aTHX_ coro); 1691 {
1692 save_perl (aTHX_ &temp);
1693 load_perl (aTHX_ coro);
1694 }
802 1695
803 destroy_stacks (aTHX); 1696 {
1697 dSP;
1698 ENTER;
1699 SAVETMPS;
1700 PUTBACK;
1701 PUSHSTACK;
1702 PUSHMARK (SP);
804 1703
805 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1704 if (ix)
1705 eval_sv (coderef, 0);
1706 else
1707 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
806 1708
807 coro->mainstack = 0; 1709 POPSTACK;
1710 FREETMPS;
1711 LEAVE;
1712 PUTBACK;
1713 }
1714
1715 if (!(coro->flags & CF_RUNNING))
1716 {
1717 save_perl (aTHX_ coro);
1718 load_perl (aTHX_ &temp);
1719 }
808 } 1720 }
1721}
809 1722
810 deallocate_stack (coro); 1723SV *
811 1724is_ready (Coro::State coro)
812 Safefree (coro); 1725 PROTOTYPE: $
1726 ALIAS:
1727 is_ready = CF_READY
1728 is_running = CF_RUNNING
1729 is_new = CF_NEW
1730 is_destroyed = CF_DESTROYED
1731 CODE:
1732 RETVAL = boolSV (coro->flags & ix);
1733 OUTPUT:
1734 RETVAL
813 1735
814void 1736void
815flush() 1737api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1738
1739SV *
1740has_stack (Coro::State coro)
1741 PROTOTYPE: $
816 CODE: 1742 CODE:
817#ifdef MAY_FLUSH 1743 RETVAL = boolSV (!!coro->cctx);
818 flush_padlist_cache (); 1744 OUTPUT:
819#endif 1745 RETVAL
820 1746
1747int
1748is_traced (Coro::State coro)
1749 PROTOTYPE: $
1750 CODE:
1751 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1752 OUTPUT:
1753 RETVAL
1754
1755IV
1756rss (Coro::State coro)
1757 PROTOTYPE: $
1758 ALIAS:
1759 usecount = 1
1760 CODE:
1761 switch (ix)
1762 {
1763 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1764 case 1: RETVAL = coro->usecount; break;
1765 }
1766 OUTPUT:
1767 RETVAL
1768
1769
821MODULE = Coro::State PACKAGE = Coro::Cont 1770MODULE = Coro::State PACKAGE = Coro
822 1771
823# this is slightly dirty 1772BOOT:
1773{
1774 int i;
1775
1776 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
1777 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
1778 av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
1779
1780 coro_current = coro_get_sv ("Coro::current", FALSE);
1781 SvREADONLY_on (coro_current);
1782
1783 coro_stash = gv_stashpv ("Coro", TRUE);
1784
1785 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1786 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1787 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1788 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1789 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1790 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1791
1792 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1793 coro_ready[i] = newAV ();
1794
1795 {
1796 SV *sv = perl_get_sv ("Coro::API", TRUE);
1797 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1798
1799 coroapi.schedule = api_schedule;
1800 coroapi.cede = api_cede;
1801 coroapi.cede_notself = api_cede_notself;
1802 coroapi.ready = api_ready;
1803 coroapi.is_ready = api_is_ready;
1804 coroapi.nready = &coro_nready;
1805 coroapi.current = coro_current;
1806
1807 GCoroAPI = &coroapi;
1808 sv_setiv (sv, (IV)&coroapi);
1809 SvREADONLY_on (sv);
1810 }
1811}
824 1812
825void 1813void
826yield(...) 1814_set_current (SV *current)
827 PROTOTYPE: @ 1815 PROTOTYPE: $
1816 CODE:
1817 SvREFCNT_dec (SvRV (coro_current));
1818 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1819
1820int
1821prio (Coro::State coro, int newprio = 0)
1822 ALIAS:
1823 nice = 1
828 CODE: 1824 CODE:
829 static SV *returnstk; 1825{
830 SV *sv; 1826 RETVAL = coro->prio;
1827
1828 if (items > 1)
1829 {
1830 if (ix)
1831 newprio = coro->prio - newprio;
1832
1833 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1834 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1835
1836 coro->prio = newprio;
1837 }
1838}
1839 OUTPUT:
1840 RETVAL
1841
1842SV *
1843ready (SV *self)
1844 PROTOTYPE: $
1845 CODE:
1846 RETVAL = boolSV (api_ready (self));
1847 OUTPUT:
1848 RETVAL
1849
1850int
1851nready (...)
1852 PROTOTYPE:
1853 CODE:
1854 RETVAL = coro_nready;
1855 OUTPUT:
1856 RETVAL
1857
1858void
1859throw (Coro::State self, SV *throw = &PL_sv_undef)
1860 PROTOTYPE: $;$
1861 CODE:
1862 SvREFCNT_dec (self->throw);
1863 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1864
1865# for async_pool speedup
1866void
1867_pool_1 (SV *cb)
1868 CODE:
1869{
1870 struct coro *coro = SvSTATE (coro_current);
1871 HV *hv = (HV *)SvRV (coro_current);
831 AV *defav = GvAV (PL_defgv); 1872 AV *defav = GvAV (PL_defgv);
832 struct coro *prev, *next; 1873 SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
1874 AV *invoke_av;
1875 int i, len;
833 1876
834 if (!returnstk) 1877 if (!invoke)
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1878 croak ("\3async_pool terminate\2\n");
836 1879
837 /* set up @_ -- ugly */ 1880 SvREFCNT_dec (coro->saved_deffh);
838 av_clear (defav); 1881 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1882
1883 hv_store (hv, "desc", sizeof ("desc") - 1,
1884 newSVpvn (strpair ("[async_pool]")), 0);
1885
1886 invoke_av = (AV *)SvRV (invoke);
1887 len = av_len (invoke_av);
1888
1889 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1890
1891 if (len > 0)
1892 {
839 av_fill (defav, items - 1); 1893 av_fill (defav, len - 1);
840 while (items--) 1894 for (i = 0; i < len; ++i)
841 av_store (defav, items, SvREFCNT_inc (ST(items))); 1895 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1896 }
842 1897
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
844 sv = av_pop ((AV *)SvRV (returnstk));
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
847 SvREFCNT_dec (sv); 1898 SvREFCNT_dec (invoke);
1899}
848 1900
849 transfer(aTHX_ prev, next, 0); 1901void
1902_pool_2 (SV *cb)
1903 CODE:
1904{
1905 struct coro *coro = SvSTATE (coro_current);
850 1906
1907 sv_setsv (cb, &PL_sv_undef);
1908
1909 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1910 coro->saved_deffh = 0;
1911
1912 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1913 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1914 croak ("\3async_pool terminate\2\n");
1915
1916 av_clear (GvAV (PL_defgv));
1917 hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
1918 newSVpvn (strpair ("[async_pool idle]")), 0);
1919
1920 coro->prio = 0;
1921
1922 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1923 api_trace (coro_current, 0);
1924
1925 av_push (av_async_pool, newSVsv (coro_current));
1926}
1927
1928
1929MODULE = Coro::State PACKAGE = Coro::AIO
1930
1931SV *
1932_get_state ()
1933 CODE:
1934{
1935 struct io_state *data;
1936
1937 RETVAL = newSV (sizeof (struct io_state));
1938 data = (struct io_state *)SvPVX (RETVAL);
1939 SvCUR_set (RETVAL, sizeof (struct io_state));
1940 SvPOK_only (RETVAL);
1941
1942 data->errorno = errno;
1943 data->laststype = PL_laststype;
1944 data->laststatval = PL_laststatval;
1945 data->statcache = PL_statcache;
1946}
1947 OUTPUT:
1948 RETVAL
1949
1950void
1951_set_state (char *data_)
1952 PROTOTYPE: $
1953 CODE:
1954{
1955 struct io_state *data = (void *)data_;
1956
1957 errno = data->errorno;
1958 PL_laststype = data->laststype;
1959 PL_laststatval = data->laststatval;
1960 PL_statcache = data->statcache;
1961}
1962

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