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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#include "libcoro/coro.c" 9#include "patchlevel.h"
10
11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
6 14
7#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
8# include <unistd.h> 16# include <unistd.h>
9# include <sys/mman.h> 17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif
10#endif 24# endif
25# include <limits.h>
26# ifndef PAGESIZE
27# define PAGESIZE pagesize
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
29static long pagesize;
30# else
31# define BOOT_PAGESIZE (void)0
32# endif
33#else
34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
11 37
12#define MAY_FLUSH /* increases codesize */ 38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif
13 44
14#define SUB_INIT "Coro::State::initialize" 45/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8
15 47
16#define TRANSFER_SAVE_DEFAV 0x00000001 48#define PERL_VERSION_ATLEAST(a,b,c) \
17#define TRANSFER_SAVE_DEFSV 0x00000002 49 (PERL_REVISION > (a) \
18#define TRANSFER_SAVE_ERRSV 0x00000004 50 || (PERL_REVISION == (a) \
19#define TRANSFER_SAVE_CCTXT 0x00000008 51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
20 53
21#define TRANSFER_SAVE_ALL -1 54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
22 74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD
90#endif
91
92#ifndef CORO_STACKGUARD
93# define CORO_STACKGUARD 0
94#endif
95
96/* prefer perl internal functions over our own? */
97#ifndef CORO_PREFER_PERL_FUNCTIONS
98# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif
100
101/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */
103#define dSTACKLEVEL volatile char stacklevel
104#define STACKLEVEL ((void *)&stacklevel)
105
106#define IN_DESTRUCT (PL_main_cv == Nullcv)
107
108#if __GNUC__ >= 3
109# define attribute(x) __attribute__(x)
110# define BARRIER __asm__ __volatile__ ("" : : : "memory")
111# define expect(expr,value) __builtin_expect ((expr),(value))
112#else
113# define attribute(x)
114# define BARRIER
115# define expect(expr,value) (expr)
116#endif
117
118#define expect_false(expr) expect ((expr) != 0, 0)
119#define expect_true(expr) expect ((expr) != 0, 1)
120
121#define NOINLINE attribute ((noinline))
122
123#include "CoroAPI.h"
124
125#ifdef USE_ITHREADS
126static perl_mutex coro_mutex;
127# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
128# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
129#else
130# define LOCK (void)0
131# define UNLOCK (void)0
132#endif
133
134/* helper storage struct for Coro::AIO */
135struct io_state
136{
137 int errorno;
138 I32 laststype;
139 int laststatval;
140 Stat_t statcache;
141};
142
143static size_t coro_stacksize = CORO_STACKSIZE;
144static struct CoroAPI coroapi;
145static AV *main_mainstack; /* used to differentiate between $main and others */
146static JMPENV *main_top_env;
147static HV *coro_state_stash, *coro_stash;
148static SV *coro_mortal; /* will be freed after next transfer */
149
150static GV *irsgv; /* $/ */
151static GV *stdoutgv; /* *STDOUT */
152
153/* async_pool helper stuff */
154static SV *sv_pool_rss;
155static SV *sv_pool_size;
156static AV *av_async_pool;
157
158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle;
160
161enum {
162 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168};
169
170/* this is a structure representing a c-level coroutine */
171typedef struct coro_cctx {
172 struct coro_cctx *next;
173
174 /* the stack */
175 void *sptr;
176 size_t ssize;
177
178 /* cpu state */
179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
181 JMPENV *top_env;
182 coro_context cctx;
183
184#if CORO_USE_VALGRIND
185 int valgrind_id;
186#endif
187 unsigned char flags;
188} coro_cctx;
189
190enum {
191 CF_RUNNING = 0x0001, /* coroutine is running */
192 CF_READY = 0x0002, /* coroutine is ready */
193 CF_NEW = 0x0004, /* has never been switched to */
194 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
195};
196
197/* this is a structure representing a perl-level coroutine */
23struct coro { 198struct coro {
24 /* the optional C context */ 199 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 200 coro_cctx *cctx;
26 void *sptr;
27 long ssize;
28
29 /* optionally saved, might be zero */
30 AV *defav;
31 SV *defsv;
32 SV *errsv;
33
34 /* saved global state not related to stacks */
35 U8 dowarn;
36
37 /* the stacks and related info (callchain etc..) */
38 PERL_SI *curstackinfo;
39 AV *curstack;
40 AV *mainstack;
41 SV **stack_sp;
42 OP *op;
43 SV **curpad;
44 SV **stack_base;
45 SV **stack_max;
46 SV **tmps_stack;
47 I32 tmps_floor;
48 I32 tmps_ix;
49 I32 tmps_max;
50 I32 *markstack;
51 I32 *markstack_ptr;
52 I32 *markstack_max;
53 I32 *scopestack;
54 I32 scopestack_ix;
55 I32 scopestack_max;
56 ANY *savestack;
57 I32 savestack_ix;
58 I32 savestack_max;
59 OP **retstack;
60 I32 retstack_ix;
61 I32 retstack_max;
62 COP *curcop;
63 JMPENV start_env;
64 JMPENV *top_env;
65 201
66 /* data associated with this coroutine (initial args) */ 202 /* data associated with this coroutine (initial args) */
67 AV *args; 203 AV *args;
204 int refcnt;
205 int flags; /* CF_ flags */
206
207 /* optionally saved, might be zero */
208 AV *defav; /* @_ */
209 SV *defsv; /* $_ */
210 SV *errsv; /* $@ */
211 SV *deffh; /* default filehandle */
212 SV *irssv; /* $/ */
213 SV *irssv_sv; /* real $/ cache */
214
215#define VAR(name,type) type name;
216# include "state.h"
217#undef VAR
218
219 /* statistics */
220 int usecount; /* number of transfers to this coro */
221
222 /* coro process data */
223 int prio;
224 //SV *throw;
225
226 /* async_pool */
227 SV *saved_deffh;
228
229 /* linked list */
230 struct coro *next, *prev;
231 HV *hv; /* the perl hash associated with this coro, if any */
68}; 232};
69 233
70typedef struct coro *Coro__State; 234typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 235typedef struct coro *Coro__State_or_hashref;
72 236
73static AV *main_mainstack; /* used to differentiate between $main and others */ 237/** Coro ********************************************************************/
74static HV *coro_state_stash;
75static HV *padlist_cache;
76 238
77/* mostly copied from op.c:cv_clone2 */ 239#define PRIO_MAX 3
78STATIC AV * 240#define PRIO_HIGH 1
79clone_padlist (AV *protopadlist) 241#define PRIO_NORMAL 0
242#define PRIO_LOW -1
243#define PRIO_IDLE -3
244#define PRIO_MIN -4
245
246/* for Coro.pm */
247static SV *coro_current;
248static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
249static int coro_nready;
250static struct coro *coro_first;
251
252/** lowlevel stuff **********************************************************/
253
254static AV *
255coro_clone_padlist (pTHX_ CV *cv)
80{ 256{
81 AV *av; 257 AV *padlist = CvPADLIST (cv);
82 I32 ix;
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
85 SV **pname = AvARRAY (protopad_name);
86 SV **ppad = AvARRAY (protopad);
87 I32 fname = AvFILLp (protopad_name);
88 I32 fpad = AvFILLp (protopad);
89 AV *newpadlist, *newpad_name, *newpad; 258 AV *newpadlist, *newpad;
90 SV **npad;
91
92 newpad_name = newAV ();
93 for (ix = fname; ix >= 0; ix--)
94 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
95
96 newpad = newAV ();
97 av_fill (newpad, AvFILLp (protopad));
98 npad = AvARRAY (newpad);
99 259
100 newpadlist = newAV (); 260 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 261 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 262#if PERL_VERSION_ATLEAST (5,9,0)
263 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
264#else
265 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
266#endif
267 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
268 --AvFILLp (padlist);
269
270 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 271 av_store (newpadlist, 1, (SV *)newpad);
104 272
105 av = newAV (); /* will be @_ */ 273 return newpadlist;
106 av_extend (av, 0); 274}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 275
110 for (ix = fpad; ix > 0; ix--) 276static void
277free_padlist (pTHX_ AV *padlist)
278{
279 /* may be during global destruction */
280 if (SvREFCNT (padlist))
111 { 281 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 282 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 283 while (i >= 0)
114 { 284 {
115 char *name = SvPVX (namesv); /* XXX */ 285 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 286 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 287 {
120 else
121 { /* our own lexical */
122 SV *sv; 288 SV *sv;
123 if (*name == '&') 289 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 290 SvREFCNT_dec (sv);
125 else if (*name == '@') 291
126 sv = (SV *) newAV (); 292 SvREFCNT_dec (*svp);
127 else if (*name == '%')
128 sv = (SV *) newHV ();
129 else
130 sv = NEWSV (0, 0);
131 if (!SvPADBUSY (sv))
132 SvPADMY_on (sv);
133 npad[ix] = sv;
134 } 293 }
135 } 294 }
136 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
137 {
138 npad[ix] = SvREFCNT_inc (ppad[ix]);
139 }
140 else
141 {
142 SV *sv = NEWSV (0, 0);
143 SvPADTMP_on (sv);
144 npad[ix] = sv;
145 }
146 }
147 295
148#if 0 /* return -ENOTUNDERSTOOD */
149 /* Now that vars are all in place, clone nested closures. */
150
151 for (ix = fpad; ix > 0; ix--) {
152 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
153 if (namesv
154 && namesv != &PL_sv_undef
155 && !(SvFLAGS(namesv) & SVf_FAKE)
156 && *SvPVX(namesv) == '&'
157 && CvCLONE(ppad[ix]))
158 {
159 CV *kid = cv_clone((CV*)ppad[ix]);
160 SvREFCNT_dec(ppad[ix]);
161 CvCLONE_on(kid);
162 SvPADMY_on(kid);
163 npad[ix] = (SV*)kid;
164 }
165 }
166#endif
167
168 return newpadlist;
169}
170
171#ifdef MAY_FLUSH
172STATIC AV *
173free_padlist (AV *padlist)
174{
175 /* may be during global destruction */
176 if (SvREFCNT(padlist))
177 {
178 I32 i = AvFILLp(padlist);
179 while (i >= 0)
180 {
181 SV **svp = av_fetch(padlist, i--, FALSE);
182 SV *sv = svp ? *svp : Nullsv;
183 if (sv)
184 SvREFCNT_dec(sv);
185 }
186
187 SvREFCNT_dec((SV*)padlist); 296 SvREFCNT_dec ((SV*)padlist);
188 } 297 }
189} 298}
190#endif 299
300static int
301coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
302{
303 AV *padlist;
304 AV *av = (AV *)mg->mg_obj;
305
306 /* casting is fun. */
307 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
308 free_padlist (aTHX_ padlist);
309
310 SvREFCNT_dec (av);
311
312 return 0;
313}
314
315#define PERL_MAGIC_coro PERL_MAGIC_ext
316
317static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
318
319#define CORO_MAGIC(cv) \
320 SvMAGIC (cv) \
321 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
322 ? SvMAGIC (cv) \
323 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
324 : 0
325
326static struct coro *
327SvSTATE_ (pTHX_ SV *coro)
328{
329 HV *stash;
330 MAGIC *mg;
331
332 if (SvROK (coro))
333 coro = SvRV (coro);
334
335 if (expect_false (SvTYPE (coro) != SVt_PVHV))
336 croak ("Coro::State object required");
337
338 stash = SvSTASH (coro);
339 if (expect_false (stash != coro_stash && stash != coro_state_stash))
340 {
341 /* very slow, but rare, check */
342 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
343 croak ("Coro::State object required");
344 }
345
346 mg = CORO_MAGIC (coro);
347 return (struct coro *)mg->mg_ptr;
348}
349
350#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
191 351
192/* the next two functions merely cache the padlists */ 352/* the next two functions merely cache the padlists */
193STATIC void 353static void
194get_padlist (CV *cv) 354get_padlist (pTHX_ CV *cv)
195{ 355{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 356 MAGIC *mg = CORO_MAGIC (cv);
357 AV *av;
197 358
198 if (he && AvFILLp ((AV *)*he) >= 0) 359 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 360 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 361 else
201 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
202}
203
204STATIC void
205put_padlist (CV *cv)
206{
207 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
208
209 if (SvTYPE (*he) != SVt_PVAV)
210 { 362 {
363#if CORO_PREFER_PERL_FUNCTIONS
364 /* this is probably cleaner, but also slower? */
365 CV *cp = Perl_cv_clone (cv);
366 CvPADLIST (cv) = CvPADLIST (cp);
367 CvPADLIST (cp) = 0;
211 SvREFCNT_dec (*he); 368 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 369#else
370 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
371#endif
213 } 372 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 373}
217 374
218#ifdef MAY_FLUSH 375static void
219STATIC void 376put_padlist (pTHX_ CV *cv)
220flush_padlist_cache ()
221{ 377{
222 HV *hv = padlist_cache; 378 MAGIC *mg = CORO_MAGIC (cv);
223 padlist_cache = newHV (); 379 AV *av;
224 380
225 if (hv_iterinit (hv)) 381 if (expect_false (!mg))
226 {
227 HE *he;
228 AV *padlist;
229
230 while (!!(he = hv_iternext (hv)))
231 {
232 AV *av = (AV *)HeVAL(he);
233
234 /* casting is fun. */
235 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
236 free_padlist (padlist);
237 }
238 } 382 {
383 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
384 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
385 mg->mg_virtual = &vtbl_coro;
386 mg->mg_obj = (SV *)newAV ();
387 }
239 388
240 SvREFCNT_dec (hv); 389 av = (AV *)mg->mg_obj;
241}
242#endif
243 390
244#define SB do { 391 if (expect_false (AvFILLp (av) >= AvMAX (av)))
245#define SE } while (0) 392 av_extend (av, AvMAX (av) + 1);
246 393
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 394 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 395}
249 396
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 397/** load & save, init *******************************************************/
251 398
252static void 399static void
253load_state(pTHX_ Coro__State c) 400load_perl (pTHX_ Coro__State c)
254{ 401{
255 PL_dowarn = c->dowarn; 402#define VAR(name,type) PL_ ## name = c->name;
403# include "state.h"
404#undef VAR
256 405
257 PL_curstackinfo = c->curstackinfo; 406 GvSV (PL_defgv) = c->defsv;
258 PL_curstack = c->curstack; 407 GvAV (PL_defgv) = c->defav;
259 PL_mainstack = c->mainstack; 408 GvSV (PL_errgv) = c->errsv;
260 PL_stack_sp = c->stack_sp; 409 GvSV (irsgv) = c->irssv_sv;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_stack_base = c->stack_base;
264 PL_stack_max = c->stack_max;
265 PL_tmps_stack = c->tmps_stack;
266 PL_tmps_floor = c->tmps_floor;
267 PL_tmps_ix = c->tmps_ix;
268 PL_tmps_max = c->tmps_max;
269 PL_markstack = c->markstack;
270 PL_markstack_ptr = c->markstack_ptr;
271 PL_markstack_max = c->markstack_max;
272 PL_scopestack = c->scopestack;
273 PL_scopestack_ix = c->scopestack_ix;
274 PL_scopestack_max = c->scopestack_max;
275 PL_savestack = c->savestack;
276 PL_savestack_ix = c->savestack_ix;
277 PL_savestack_max = c->savestack_max;
278 PL_retstack = c->retstack;
279 PL_retstack_ix = c->retstack_ix;
280 PL_retstack_max = c->retstack_max;
281 PL_curcop = c->curcop;
282 PL_start_env = c->start_env;
283 PL_top_env = c->top_env;
284
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
288 410
289 { 411 {
290 dSP; 412 dSP;
291 CV *cv; 413 CV *cv;
292 414
293 /* now do the ugly restore mess */ 415 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 416 while (expect_true (cv = (CV *)POPs))
295 { 417 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 418 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 419 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 420 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 421 }
309 422
310 PUTBACK; 423 PUTBACK;
311 } 424 }
312} 425}
313 426
314static void 427static void
315save_state(pTHX_ Coro__State c, int flags) 428save_perl (pTHX_ Coro__State c)
316{ 429{
317 { 430 {
318 dSP; 431 dSP;
319 I32 cxix = cxstack_ix; 432 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 433 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 436 /*
324 * the worst thing you can imagine happens first - we have to save 437 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 438 * (and reinitialize) all cv's in the whole callchain :(
326 */ 439 */
327 440
328 PUSHs (Nullsv); 441 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 442 /* this loop was inspired by pp_caller */
330 for (;;) 443 for (;;)
331 { 444 {
332 do 445 while (expect_true (cxix >= 0))
333 { 446 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 447 PERL_CONTEXT *cx = &ccstk[cxix--];
335 448
336 if (CxTYPE(cx) == CXt_SUB) 449 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 450 {
338 CV *cv = cx->blk_sub.cv; 451 CV *cv = cx->blk_sub.cv;
452
339 if (CvDEPTH(cv)) 453 if (expect_true (CvDEPTH (cv)))
340 { 454 {
341#ifdef USE_THREADS
342 /*XPUSHs ((SV *)CvOWNER(cv));*/
343 /*CvOWNER(cv) = 0;*/
344 /*error must unlock this cv etc.. etc...*/
345#endif
346 EXTEND (SP, CvDEPTH(cv)*2); 455 EXTEND (SP, 3);
347
348 while (--CvDEPTH(cv))
349 {
350 /* this tells the restore code to increment CvDEPTH */
351 PUSHs (Nullsv);
352 PUSHs ((SV *)cv);
353 }
354
355 PUSHs ((SV *)CvPADLIST(cv)); 456 PUSHs ((SV *)CvPADLIST (cv));
457 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 458 PUSHs ((SV *)cv);
357 459
358 get_padlist (cv); /* this is a monster */ 460 CvDEPTH (cv) = 0;
461 get_padlist (aTHX_ cv);
359 } 462 }
360 } 463 }
361 else if (CxTYPE(cx) == CXt_FORMAT)
362 {
363 /* I never used formats, so how should I know how these are implemented? */
364 /* my bold guess is as a simple, plain sub... */
365 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366 }
367 } 464 }
368 while (cxix >= 0);
369 465
370 if (top_si->si_type == PERLSI_MAIN) 466 if (expect_true (top_si->si_type == PERLSI_MAIN))
371 break; 467 break;
372 468
373 top_si = top_si->si_prev; 469 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 470 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 471 cxix = top_si->si_cxix;
376 } 472 }
377 473
378 PUTBACK; 474 PUTBACK;
379 } 475 }
380 476
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 477 c->defav = GvAV (PL_defgv);
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 478 c->defsv = DEFSV;
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 479 c->errsv = ERRSV;
480 c->irssv_sv = GvSV (irsgv);
384 481
385 /* I have not the slightest idea of why av_reify is necessary */ 482#define VAR(name,type)c->name = PL_ ## name;
386 /* but if it's missing the defav contents magically get replaced sometimes */ 483# include "state.h"
387 if (c->defav) 484#undef VAR
388 av_reify (c->defav);
389
390 c->dowarn = PL_dowarn;
391
392 c->curstackinfo = PL_curstackinfo;
393 c->curstack = PL_curstack;
394 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp;
396 c->op = PL_op;
397 c->curpad = PL_curpad;
398 c->stack_base = PL_stack_base;
399 c->stack_max = PL_stack_max;
400 c->tmps_stack = PL_tmps_stack;
401 c->tmps_floor = PL_tmps_floor;
402 c->tmps_ix = PL_tmps_ix;
403 c->tmps_max = PL_tmps_max;
404 c->markstack = PL_markstack;
405 c->markstack_ptr = PL_markstack_ptr;
406 c->markstack_max = PL_markstack_max;
407 c->scopestack = PL_scopestack;
408 c->scopestack_ix = PL_scopestack_ix;
409 c->scopestack_max = PL_scopestack_max;
410 c->savestack = PL_savestack;
411 c->savestack_ix = PL_savestack_ix;
412 c->savestack_max = PL_savestack_max;
413 c->retstack = PL_retstack;
414 c->retstack_ix = PL_retstack_ix;
415 c->retstack_max = PL_retstack_max;
416 c->curcop = PL_curcop;
417 c->start_env = PL_start_env;
418 c->top_env = PL_top_env;
419} 485}
420 486
421/* 487/*
422 * allocate various perl stacks. This is an exact copy 488 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 489 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 490 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 491 * not usually need a lot of stackspace.
426 */ 492 */
427STATIC void 493#if CORO_PREFER_PERL_FUNCTIONS
494# define coro_init_stacks init_stacks
495#else
496static void
428coro_init_stacks (pTHX) 497coro_init_stacks (pTHX)
429{ 498{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 499 PL_curstackinfo = new_stackinfo(64, 6);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 500 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 501 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 503
435 PL_stack_base = AvARRAY(PL_curstack); 504 PL_stack_base = AvARRAY(PL_curstack);
… …
439 New(50,PL_tmps_stack,64,SV*); 508 New(50,PL_tmps_stack,64,SV*);
440 PL_tmps_floor = -1; 509 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 510 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 511 PL_tmps_max = 64;
443 512
444 New(54,PL_markstack,12,I32); 513 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 514 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 515 PL_markstack_max = PL_markstack + 16;
447 516
517#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 518 SET_MARK_OFFSET;
519#endif
449 520
450 New(54,PL_scopestack,12,I32); 521 New(54,PL_scopestack,16,I32);
451 PL_scopestack_ix = 0; 522 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 523 PL_scopestack_max = 16;
453 524
454 New(54,PL_savestack,64,ANY); 525 New(54,PL_savestack,64,ANY);
455 PL_savestack_ix = 0; 526 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 527 PL_savestack_max = 64;
457 528
529#if !PERL_VERSION_ATLEAST (5,9,0)
458 New(54,PL_retstack,8,OP*); 530 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 531 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 532 PL_retstack_max = 4;
533#endif
461} 534}
535#endif
462 536
463/* 537/*
464 * destroy the stacks, the callchain etc... 538 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 539 */
467STATIC void 540static void
468destroy_stacks(pTHX) 541coro_destroy_stacks (pTHX)
469{ 542{
470 /* is this ugly, I ask? */
471 while (PL_scopestack_ix)
472 LEAVE;
473
474 /* sure it is, but more important: is it correct?? :/ */
475 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476 FREETMPS;
477
478 while (PL_curstackinfo->si_next) 543 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 544 PL_curstackinfo = PL_curstackinfo->si_next;
480 545
481 while (PL_curstackinfo) 546 while (PL_curstackinfo)
482 { 547 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 548 PERL_SI *p = PL_curstackinfo->si_prev;
484 549
485 { 550 if (!IN_DESTRUCT)
486 dSP;
487 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488 PUTBACK; /* possibly superfluous */
489 }
490
491 dounwind(-1);
492
493 SvREFCNT_dec(PL_curstackinfo->si_stack); 551 SvREFCNT_dec (PL_curstackinfo->si_stack);
552
494 Safefree(PL_curstackinfo->si_cxstack); 553 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 554 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 555 PL_curstackinfo = p;
497 } 556 }
498 557
499 Safefree(PL_tmps_stack); 558 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 559 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 560 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 561 Safefree (PL_savestack);
562#if !PERL_VERSION_ATLEAST (5,9,0)
503 Safefree(PL_retstack); 563 Safefree (PL_retstack);
504}
505
506static void
507allocate_stack (Coro__State ctx)
508{
509#ifdef HAVE_MMAP
510 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
511 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
512 if (ctx->sptr == (void *)-1)
513#endif 564#endif
514 { 565}
515 /*FIXME*//*D*//* reasonable stack size! */ 566
516 ctx->ssize = 4096 * sizeof (long); 567static size_t
517 New (0, ctx->sptr, 4096, long); 568coro_rss (pTHX_ struct coro *coro)
569{
570 size_t rss = sizeof (*coro);
571
572 if (coro->mainstack)
518 } 573 {
519} 574 if (coro->flags & CF_RUNNING)
575 {
576 #define VAR(name,type)coro->name = PL_ ## name;
577 # include "state.h"
578 #undef VAR
579 }
520 580
521static void 581 rss += sizeof (coro->curstackinfo);
522deallocate_stack (Coro__State ctx) 582 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
523{ 583 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
524#ifdef HAVE_MMAP 584 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
525 munmap (ctx->sptr, ctx->ssize); 585 rss += coro->tmps_max * sizeof (SV *);
526#else 586 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
527 Safefree (ctx->sptr); 587 rss += coro->scopestack_max * sizeof (I32);
528#endif 588 rss += coro->savestack_max * sizeof (ANY);
529}
530 589
531/* might go away together with optional SAVE_CCTXT */ 590#if !PERL_VERSION_ATLEAST (5,9,0)
591 rss += coro->retstack_max * sizeof (OP *);
592#endif
593 }
594
595 return rss;
596}
597
598/** coroutine stack handling ************************************************/
599
532static void 600static void
533setup_coro (void *arg) 601coro_setup (pTHX_ struct coro *coro)
534{ 602{
535 /* 603 /*
536 * emulate part of the perl startup here. 604 * emulate part of the perl startup here.
537 */ 605 */
606 coro_init_stacks (aTHX);
607
608 PL_runops = RUNOPS_DEFAULT;
609 PL_curcop = &PL_compiling;
610 PL_in_eval = EVAL_NULL;
611 PL_comppad = 0;
612 PL_curpm = 0;
613 PL_localizing = 0;
614 PL_dirty = 0;
615 PL_restartop = 0;
616
617 GvSV (PL_defgv) = newSV (0);
618 GvAV (PL_defgv) = coro->args; coro->args = 0;
619 GvSV (PL_errgv) = newSV (0);
620 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
621 PL_rs = newSVsv (GvSV (irsgv));
622 PL_defoutgv = SvREFCNT_inc (stdoutgv);
623
624 ENTER; /* necessary e.g. for dounwind */
625
626 {
627 dSP;
628 LOGOP myop;
629
630 Zero (&myop, 1, LOGOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK (SP);
635 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
636 PUTBACK;
637 PL_op = (OP *)&myop;
638 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
639 SPAGAIN;
640 }
641}
642
643static void
644coro_destroy (pTHX_ struct coro *coro)
645{
646 if (!IN_DESTRUCT)
647 {
648 /* restore all saved variables and stuff */
649 LEAVE_SCOPE (0);
650 assert (PL_tmps_floor == -1);
651
652 /* free all temporaries */
653 FREETMPS;
654 assert (PL_tmps_ix == -1);
655
656 /* unwind all extra stacks */
657 POPSTACK_TO (PL_mainstack);
658
659 /* unwind main stack */
660 dounwind (-1);
661 }
662
663 SvREFCNT_dec (GvSV (PL_defgv));
664 SvREFCNT_dec (GvAV (PL_defgv));
665 SvREFCNT_dec (GvSV (PL_errgv));
666 SvREFCNT_dec (PL_defoutgv);
667 SvREFCNT_dec (PL_rs);
668 SvREFCNT_dec (GvSV (irsgv));
669
670 SvREFCNT_dec (coro->saved_deffh);
671 //SvREFCNT_dec (coro->throw);
672
673 coro_destroy_stacks (aTHX);
674}
675
676static void
677free_coro_mortal (pTHX)
678{
679 if (expect_true (coro_mortal))
680 {
681 SvREFCNT_dec (coro_mortal);
682 coro_mortal = 0;
683 }
684}
685
686static int
687runops_trace (pTHX)
688{
689 COP *oldcop = 0;
690 int oldcxix = -2;
691 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
692 coro_cctx *cctx = coro->cctx;
693
694 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
695 {
696 PERL_ASYNC_CHECK ();
697
698 if (cctx->flags & CC_TRACE_ALL)
699 {
700 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
701 {
702 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
703 SV **bot, **top;
704 AV *av = newAV (); /* return values */
705 SV **cb;
706 dSP;
707
708 GV *gv = CvGV (cx->blk_sub.cv);
709 SV *fullname = sv_2mortal (newSV (0));
710 if (isGV (gv))
711 gv_efullname3 (fullname, gv, 0);
712
713 bot = PL_stack_base + cx->blk_oldsp + 1;
714 top = cx->blk_gimme == G_ARRAY ? SP + 1
715 : cx->blk_gimme == G_SCALAR ? bot + 1
716 : bot;
717
718 av_extend (av, top - bot);
719 while (bot < top)
720 av_push (av, SvREFCNT_inc (*bot++));
721
722 PL_runops = RUNOPS_DEFAULT;
723 ENTER;
724 SAVETMPS;
725 EXTEND (SP, 3);
726 PUSHMARK (SP);
727 PUSHs (&PL_sv_no);
728 PUSHs (fullname);
729 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
730 PUTBACK;
731 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
732 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
733 SPAGAIN;
734 FREETMPS;
735 LEAVE;
736 PL_runops = runops_trace;
737 }
738
739 if (oldcop != PL_curcop)
740 {
741 oldcop = PL_curcop;
742
743 if (PL_curcop != &PL_compiling)
744 {
745 SV **cb;
746
747 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
748 {
749 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
750
751 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
752 {
753 runops_proc_t old_runops = PL_runops;
754 dSP;
755 GV *gv = CvGV (cx->blk_sub.cv);
756 SV *fullname = sv_2mortal (newSV (0));
757
758 if (isGV (gv))
759 gv_efullname3 (fullname, gv, 0);
760
761 PL_runops = RUNOPS_DEFAULT;
762 ENTER;
763 SAVETMPS;
764 EXTEND (SP, 3);
765 PUSHMARK (SP);
766 PUSHs (&PL_sv_yes);
767 PUSHs (fullname);
768 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
769 PUTBACK;
770 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
771 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
772 SPAGAIN;
773 FREETMPS;
774 LEAVE;
775 PL_runops = runops_trace;
776 }
777
778 oldcxix = cxstack_ix;
779 }
780
781 if (cctx->flags & CC_TRACE_LINE)
782 {
783 dSP;
784
785 PL_runops = RUNOPS_DEFAULT;
786 ENTER;
787 SAVETMPS;
788 EXTEND (SP, 3);
789 PL_runops = RUNOPS_DEFAULT;
790 PUSHMARK (SP);
791 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
792 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
793 PUTBACK;
794 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
795 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
796 SPAGAIN;
797 FREETMPS;
798 LEAVE;
799 PL_runops = runops_trace;
800 }
801 }
802 }
803 }
804 }
805
806 TAINT_NOT;
807 return 0;
808}
809
810/* inject a fake call to Coro::State::_cctx_init into the execution */
811/* _cctx_init should be careful, as it could be called at almost any time */
812/* during execution of a perl program */
813static void NOINLINE
814prepare_cctx (pTHX_ coro_cctx *cctx)
815{
538 dSP; 816 dSP;
539 Coro__State ctx = (Coro__State)arg; 817 LOGOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 818
542 coro_init_stacks (aTHX); 819 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 820
821 if (cctx->flags & CC_TRACE)
822 PL_runops = runops_trace;
823
824 Zero (&myop, 1, LOGOP);
825 myop.op_next = PL_op;
826 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
827
828 PUSHMARK (SP);
829 EXTEND (SP, 2);
830 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
831 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
832 PUTBACK;
833 PL_op = (OP *)&myop;
834 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 835 SPAGAIN;
836}
545 837
546 /*PL_curcop = 0;*/ 838/*
547 SvREFCNT_dec (GvAV (PL_defgv)); 839 * this is a _very_ stripped down perl interpreter ;)
548 GvAV (PL_defgv) = ctx->args; 840 */
841static void
842coro_run (void *arg)
843{
844 dTHX;
549 845
550 if (ctx->sptr) 846 /* coro_run is the alternative tail of transfer(), so unlock here. */
847 UNLOCK;
848
849 /* we now skip the entersub that lead to transfer() */
850 PL_op = PL_op->op_next;
851
852 /* inject a fake subroutine call to cctx_init */
853 prepare_cctx (aTHX_ (coro_cctx *)arg);
854
855 /* somebody or something will hit me for both perl_run and PL_restartop */
856 PL_restartop = PL_op;
857 perl_run (PL_curinterp);
858
859 /*
860 * If perl-run returns we assume exit() was being called or the coro
861 * fell off the end, which seems to be the only valid (non-bug)
862 * reason for perl_run to return. We try to exit by jumping to the
863 * bootstrap-time "top" top_env, as we cannot restore the "main"
864 * coroutine as Coro has no such concept
865 */
866 PL_top_env = main_top_env;
867 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
868}
869
870static coro_cctx *
871cctx_new ()
872{
873 coro_cctx *cctx;
874 void *stack_start;
875 size_t stack_size;
876
877 ++cctx_count;
878
879 Newz (0, cctx, 1, coro_cctx);
880
881#if HAVE_MMAP
882
883 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
884 /* mmap supposedly does allocate-on-write for us */
885 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
886
887 if (cctx->sptr != (void *)-1)
551 { 888 {
552 PUSHMARK(SP); 889# if CORO_STACKGUARD
553 PUTBACK; 890 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 891# endif
555 croak ("FATAL: CCTXT coroutine returned!"); 892 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
893 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
894 cctx->flags |= CC_MAPPED;
556 } 895 }
557 else 896 else
558 { 897#endif
559 UNOP myop;
560
561 PL_op = (OP *)&myop;
562
563 Zero(&myop, 1, UNOP);
564 myop.op_next = Nullop;
565 myop.op_flags = OPf_WANT_VOID;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 /*
570 * the next line is slightly wrong, as PL_op->op_next
571 * is actually being executed so we skip the first op.
572 * that doesn't matter, though, since it is only
573 * pp_nextstate and we never return...
574 * ah yes, and I don't care anyways ;)
575 */
576 PUTBACK;
577 PL_op = pp_entersub();
578 SPAGAIN;
579
580 ENTER; /* necessary e.g. for dounwind */
581 } 898 {
582} 899 cctx->ssize = coro_stacksize * (long)sizeof (long);
900 New (0, cctx->sptr, coro_stacksize, long);
583 901
584STATIC void 902 if (!cctx->sptr)
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
586{
587 dSP;
588
589 if (prev != next)
590 {
591 /*
592 * this could be done in newprocess which would lead to
593 * extremely elegant and fast (basically just SAVE/LOAD)
594 * code here, but lazy allocation of stacks has also
595 * some virtues and the overhead of the if() is nil.
596 */
597 if (next->mainstack)
598 { 903 {
599 SAVE (prev, flags); 904 perror ("FATAL: unable to allocate stack for coroutine");
600 LOAD (next); 905 _exit (EXIT_FAILURE);
601
602 /* mark this state as in-use */
603 next->mainstack = 0;
604 next->tmps_ix = -2;
605
606 if (flags & TRANSFER_SAVE_CCTXT)
607 {
608 if (!next->ssize)
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611 if (!prev->ssize)
612 prev->ssize = 1; /* mark cctx as valid ;) */
613
614 coro_transfer (&(prev->cctx), &(next->cctx));
615 }
616
617 } 906 }
618 else if (next->tmps_ix == -2) 907
619 croak ("tried to transfer to running coroutine"); 908 stack_start = cctx->sptr;
909 stack_size = cctx->ssize;
910 }
911
912 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
913 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
914
915 return cctx;
916}
917
918static void
919cctx_destroy (coro_cctx *cctx)
920{
921 if (!cctx)
922 return;
923
924 --cctx_count;
925
926#if CORO_USE_VALGRIND
927 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
928#endif
929
930#if HAVE_MMAP
931 if (cctx->flags & CC_MAPPED)
932 munmap (cctx->sptr, cctx->ssize);
933 else
934#endif
935 Safefree (cctx->sptr);
936
937 Safefree (cctx);
938}
939
940/* wether this cctx should be destructed */
941#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
942
943static coro_cctx *
944cctx_get (pTHX)
945{
946 while (expect_true (cctx_first))
947 {
948 coro_cctx *cctx = cctx_first;
949 cctx_first = cctx->next;
950 --cctx_idle;
951
952 if (expect_true (!CCTX_EXPIRED (cctx)))
953 return cctx;
954
955 cctx_destroy (cctx);
956 }
957
958 return cctx_new ();
959}
960
961static void
962cctx_put (coro_cctx *cctx)
963{
964 /* free another cctx if overlimit */
965 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
966 {
967 coro_cctx *first = cctx_first;
968 cctx_first = first->next;
969 --cctx_idle;
970
971 cctx_destroy (first);
972 }
973
974 ++cctx_idle;
975 cctx->next = cctx_first;
976 cctx_first = cctx;
977}
978
979/** coroutine switching *****************************************************/
980
981static void
982transfer_check (pTHX_ struct coro *prev, struct coro *next)
983{
984 if (expect_true (prev != next))
985 {
986 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
987 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
988
989 if (expect_false (next->flags & CF_RUNNING))
990 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
991
992 if (expect_false (next->flags & CF_DESTROYED))
993 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
994
995 if (expect_false (PL_lex_state != LEX_NOTPARSING))
996 croak ("Coro::State::transfer called while parsing, but this is not supported");
997 }
998}
999
1000/* always use the TRANSFER macro */
1001static void NOINLINE
1002transfer (pTHX_ struct coro *prev, struct coro *next)
1003{
1004 dSTACKLEVEL;
1005
1006 /* sometimes transfer is only called to set idle_sp */
1007 if (expect_false (!next))
1008 {
1009 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1010 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1011 }
1012 else if (expect_true (prev != next))
1013 {
1014 coro_cctx *prev__cctx;
1015
1016 if (expect_false (prev->flags & CF_NEW))
1017 {
1018 /* create a new empty context */
1019 Newz (0, prev->cctx, 1, coro_cctx);
1020 prev->flags &= ~CF_NEW;
1021 prev->flags |= CF_RUNNING;
1022 }
1023
1024 prev->flags &= ~CF_RUNNING;
1025 next->flags |= CF_RUNNING;
1026
1027 LOCK;
1028
1029 if (expect_false (next->flags & CF_NEW))
1030 {
1031 /* need to start coroutine */
1032 next->flags &= ~CF_NEW;
1033 /* first get rid of the old state */
1034 save_perl (aTHX_ prev);
1035 /* setup coroutine call */
1036 coro_setup (aTHX_ next);
1037 }
620 else 1038 else
621 { 1039 {
622 SAVE (prev, -1); /* first get rid of the old state */ 1040 /* coroutine already started */
623 1041 save_perl (aTHX_ prev);
624 if (flags & TRANSFER_SAVE_CCTXT) 1042 load_perl (aTHX_ next);
625 {
626 if (!next->ssize)
627 {
628 allocate_stack (next);
629 coro_create (&(next->cctx),
630 setup_coro, (void *)next,
631 next->sptr, next->ssize);
632 }
633
634 if (!prev->ssize)
635 prev->ssize = 1; /* mark cctx as valid ;) */
636
637 coro_transfer (&(prev->cctx), &(next->cctx));
638 }
639 else
640 setup_coro (next);
641 } 1043 }
1044
1045 prev__cctx = prev->cctx;
1046
1047 /* possibly "free" the cctx */
1048 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1049 {
1050 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1051 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1052
1053 prev->cctx = 0;
1054
1055 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1056 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1057 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1058 next->cctx = cctx_get (aTHX);
1059
1060 cctx_put (prev__cctx);
1061 }
1062
1063 ++next->usecount;
1064
1065 if (expect_true (!next->cctx))
1066 next->cctx = cctx_get (aTHX);
1067
1068 if (expect_false (prev__cctx != next->cctx))
1069 {
1070 prev__cctx->top_env = PL_top_env;
1071 PL_top_env = next->cctx->top_env;
1072 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1073 }
1074
1075 free_coro_mortal (aTHX);
1076 UNLOCK;
1077 }
1078}
1079
1080struct transfer_args
1081{
1082 struct coro *prev, *next;
1083};
1084
1085#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1086#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1087
1088/** high level stuff ********************************************************/
1089
1090static int
1091coro_state_destroy (pTHX_ struct coro *coro)
1092{
1093 if (coro->flags & CF_DESTROYED)
1094 return 0;
1095
1096 coro->flags |= CF_DESTROYED;
1097
1098 if (coro->flags & CF_READY)
642 } 1099 {
643} 1100 /* reduce nready, as destroying a ready coro effectively unreadies it */
1101 /* alternative: look through all ready queues and remove the coro */
1102 LOCK;
1103 --coro_nready;
1104 UNLOCK;
1105 }
1106 else
1107 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
644 1108
1109 if (coro->mainstack && coro->mainstack != main_mainstack)
1110 {
1111 struct coro temp;
1112
1113 if (coro->flags & CF_RUNNING)
1114 croak ("FATAL: tried to destroy currently running coroutine");
1115
1116 save_perl (aTHX_ &temp);
1117 load_perl (aTHX_ coro);
1118
1119 coro_destroy (aTHX_ coro);
1120
1121 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1122
1123 coro->mainstack = 0;
1124 }
1125
1126 cctx_destroy (coro->cctx);
1127 SvREFCNT_dec (coro->args);
1128
1129 if (coro->next) coro->next->prev = coro->prev;
1130 if (coro->prev) coro->prev->next = coro->next;
1131 if (coro == coro_first) coro_first = coro->next;
1132
1133 return 1;
1134}
1135
1136static int
1137coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1138{
1139 struct coro *coro = (struct coro *)mg->mg_ptr;
1140 mg->mg_ptr = 0;
1141
1142 coro->hv = 0;
1143
1144 if (--coro->refcnt < 0)
1145 {
1146 coro_state_destroy (aTHX_ coro);
1147 Safefree (coro);
1148 }
1149
1150 return 0;
1151}
1152
1153static int
1154coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1155{
1156 struct coro *coro = (struct coro *)mg->mg_ptr;
1157
1158 ++coro->refcnt;
1159
1160 return 0;
1161}
1162
1163static MGVTBL coro_state_vtbl = {
1164 0, 0, 0, 0,
1165 coro_state_free,
1166 0,
1167#ifdef MGf_DUP
1168 coro_state_dup,
1169#else
1170# define MGf_DUP 0
1171#endif
1172};
1173
1174static void
1175prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1176{
1177 ta->prev = SvSTATE (prev_sv);
1178 ta->next = SvSTATE (next_sv);
1179 TRANSFER_CHECK (*ta);
1180}
1181
1182static void
1183api_transfer (SV *prev_sv, SV *next_sv)
1184{
1185 dTHX;
1186 struct transfer_args ta;
1187
1188 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1189 TRANSFER (ta);
1190}
1191
1192/** Coro ********************************************************************/
1193
1194static void
1195coro_enq (pTHX_ SV *coro_sv)
1196{
1197 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1198}
1199
1200static SV *
1201coro_deq (pTHX_ int min_prio)
1202{
1203 int prio = PRIO_MAX - PRIO_MIN;
1204
1205 min_prio -= PRIO_MIN;
1206 if (min_prio < 0)
1207 min_prio = 0;
1208
1209 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1210 if (AvFILLp (coro_ready [prio]) >= 0)
1211 return av_shift (coro_ready [prio]);
1212
1213 return 0;
1214}
1215
1216static int
1217api_ready (SV *coro_sv)
1218{
1219 dTHX;
1220 struct coro *coro;
1221
1222 if (SvROK (coro_sv))
1223 coro_sv = SvRV (coro_sv);
1224
1225 coro = SvSTATE (coro_sv);
1226
1227 if (coro->flags & CF_READY)
1228 return 0;
1229
1230 coro->flags |= CF_READY;
1231
1232 LOCK;
1233 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1234 ++coro_nready;
1235 UNLOCK;
1236
1237 return 1;
1238}
1239
1240static int
1241api_is_ready (SV *coro_sv)
1242{
1243 dTHX;
1244 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1245}
1246
1247static void
1248prepare_schedule (pTHX_ struct transfer_args *ta)
1249{
1250 SV *prev_sv, *next_sv;
1251
1252 for (;;)
1253 {
1254 LOCK;
1255 next_sv = coro_deq (aTHX_ PRIO_MIN);
1256
1257 /* nothing to schedule: call the idle handler */
1258 if (expect_false (!next_sv))
1259 {
1260 dSP;
1261 UNLOCK;
1262
1263 ENTER;
1264 SAVETMPS;
1265
1266 PUSHMARK (SP);
1267 PUTBACK;
1268 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1269
1270 FREETMPS;
1271 LEAVE;
1272 continue;
1273 }
1274
1275 ta->next = SvSTATE (next_sv);
1276
1277 /* cannot transfer to destroyed coros, skip and look for next */
1278 if (expect_false (ta->next->flags & CF_DESTROYED))
1279 {
1280 UNLOCK;
1281 SvREFCNT_dec (next_sv);
1282 /* coro_nready is already taken care of by destroy */
1283 continue;
1284 }
1285
1286 --coro_nready;
1287 UNLOCK;
1288 break;
1289 }
1290
1291 /* free this only after the transfer */
1292 prev_sv = SvRV (coro_current);
1293 ta->prev = SvSTATE (prev_sv);
1294 TRANSFER_CHECK (*ta);
1295 assert (ta->next->flags & CF_READY);
1296 ta->next->flags &= ~CF_READY;
1297 SvRV_set (coro_current, next_sv);
1298
1299 LOCK;
1300 free_coro_mortal (aTHX);
1301 coro_mortal = prev_sv;
1302 UNLOCK;
1303}
1304
1305static void
1306prepare_cede (pTHX_ struct transfer_args *ta)
1307{
1308 api_ready (coro_current);
1309 prepare_schedule (aTHX_ ta);
1310}
1311
1312static int
1313prepare_cede_notself (pTHX_ struct transfer_args *ta)
1314{
1315 if (coro_nready)
1316 {
1317 SV *prev = SvRV (coro_current);
1318 prepare_schedule (aTHX_ ta);
1319 api_ready (prev);
1320 return 1;
1321 }
1322 else
1323 return 0;
1324}
1325
1326static void
1327api_schedule (void)
1328{
1329 dTHX;
1330 struct transfer_args ta;
1331
1332 prepare_schedule (aTHX_ &ta);
1333 TRANSFER (ta);
1334}
1335
1336static int
1337api_cede (void)
1338{
1339 dTHX;
1340 struct transfer_args ta;
1341
1342 prepare_cede (aTHX_ &ta);
1343
1344 if (expect_true (ta.prev != ta.next))
1345 {
1346 TRANSFER (ta);
1347 return 1;
1348 }
1349 else
1350 return 0;
1351}
1352
1353static int
1354api_cede_notself (void)
1355{
1356 dTHX;
1357 struct transfer_args ta;
1358
1359 if (prepare_cede_notself (aTHX_ &ta))
1360 {
1361 TRANSFER (ta);
1362 return 1;
1363 }
1364 else
1365 return 0;
1366}
1367
1368static void
1369api_trace (SV *coro_sv, int flags)
1370{
1371 dTHX;
1372 struct coro *coro = SvSTATE (coro_sv);
1373
1374 if (flags & CC_TRACE)
1375 {
1376 if (!coro->cctx)
1377 coro->cctx = cctx_new ();
1378 else if (!(coro->cctx->flags & CC_TRACE))
1379 croak ("cannot enable tracing on coroutine with custom stack");
1380
1381 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1382 }
1383 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1384 {
1385 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1386
1387 if (coro->flags & CF_RUNNING)
1388 PL_runops = RUNOPS_DEFAULT;
1389 else
1390 coro->runops = RUNOPS_DEFAULT;
1391 }
1392}
1393
645MODULE = Coro::State PACKAGE = Coro::State 1394MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
646 1395
647PROTOTYPES: ENABLE 1396PROTOTYPES: DISABLE
648 1397
649BOOT: 1398BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */ 1399{
1400#ifdef USE_ITHREADS
1401 MUTEX_INIT (&coro_mutex);
1402#endif
1403 BOOT_PAGESIZE;
1404
1405 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1406 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1407
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE); 1408 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652 1409
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1410 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1411 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1412 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1413 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660 1414
661 main_mainstack = PL_mainstack; 1415 main_mainstack = PL_mainstack;
662} 1416 main_top_env = PL_top_env;
663 1417
664Coro::State 1418 while (main_top_env->je_prev)
665_newprocess(args) 1419 main_top_env = main_top_env->je_prev;
666 SV * args 1420
667 PROTOTYPE: $ 1421 coroapi.ver = CORO_API_VERSION;
1422 coroapi.transfer = api_transfer;
1423
1424 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1425}
1426
1427SV *
1428new (char *klass, ...)
668 CODE: 1429 CODE:
669 Coro__State coro; 1430{
1431 struct coro *coro;
1432 HV *hv;
1433 int i;
670 1434
671 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
672 croak ("Coro::State::_newprocess expects an arrayref");
673
674 New (0, coro, 1, struct coro); 1435 Newz (0, coro, 1, struct coro);
1436 coro->args = newAV ();
1437 coro->flags = CF_NEW;
675 1438
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1439 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1440 coro->next = coro_first;
678 coro->sptr = 0; 1441 coro_first = coro;
679 coro->ssize = 0;
680 1442
681 RETVAL = coro; 1443 coro->hv = hv = newHV ();
1444 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1445 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1446
1447 av_extend (coro->args, items - 1);
1448 for (i = 1; i < items; i++)
1449 av_push (coro->args, newSVsv (ST (i)));
1450}
682 OUTPUT: 1451 OUTPUT:
683 RETVAL 1452 RETVAL
684 1453
1454# these not obviously related functions are all rolled into the same xs
1455# function to increase chances that they all will call transfer with the same
1456# stack offset
685void 1457void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1458_set_stacklevel (...)
687 Coro::State_or_hashref prev 1459 ALIAS:
688 Coro::State_or_hashref next 1460 Coro::State::transfer = 1
689 int flags 1461 Coro::schedule = 2
690 PROTOTYPE: @ 1462 Coro::cede = 3
1463 Coro::cede_notself = 4
691 CODE: 1464 CODE:
692 transfer (aTHX_ prev, next, flags); 1465{
1466 struct transfer_args ta;
1467
1468 switch (ix)
1469 {
1470 case 0:
1471 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1472 ta.next = 0;
1473 break;
1474
1475 case 1:
1476 if (items != 2)
1477 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1478
1479 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1480 break;
1481
1482 case 2:
1483 prepare_schedule (aTHX_ &ta);
1484 break;
1485
1486 case 3:
1487 prepare_cede (aTHX_ &ta);
1488 break;
1489
1490 case 4:
1491 if (!prepare_cede_notself (aTHX_ &ta))
1492 XSRETURN_EMPTY;
1493
1494 break;
1495 }
1496
1497 BARRIER;
1498 TRANSFER (ta);
1499
1500 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1501 XSRETURN_YES;
1502}
1503
1504bool
1505_destroy (SV *coro_sv)
1506 CODE:
1507 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1508 OUTPUT:
1509 RETVAL
693 1510
694void 1511void
695DESTROY(coro) 1512_exit (code)
696 Coro::State coro 1513 int code
697 CODE: 1514 PROTOTYPE: $
1515 CODE:
1516 _exit (code);
698 1517
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1518int
1519cctx_stacksize (int new_stacksize = 0)
1520 CODE:
1521 RETVAL = coro_stacksize;
1522 if (new_stacksize)
1523 coro_stacksize = new_stacksize;
1524 OUTPUT:
1525 RETVAL
1526
1527int
1528cctx_count ()
1529 CODE:
1530 RETVAL = cctx_count;
1531 OUTPUT:
1532 RETVAL
1533
1534int
1535cctx_idle ()
1536 CODE:
1537 RETVAL = cctx_idle;
1538 OUTPUT:
1539 RETVAL
1540
1541void
1542list ()
1543 PPCODE:
1544{
1545 struct coro *coro;
1546 for (coro = coro_first; coro; coro = coro->next)
1547 if (coro->hv)
1548 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1549}
1550
1551void
1552call (Coro::State coro, SV *coderef)
1553 ALIAS:
1554 eval = 1
1555 CODE:
1556{
1557 if (coro->mainstack)
700 { 1558 {
701 struct coro temp; 1559 struct coro temp;
1560 Zero (&temp, 1, struct coro);
702 1561
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1562 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 1563 {
1564 save_perl (aTHX_ &temp);
1565 load_perl (aTHX_ coro);
1566 }
705 1567
706 destroy_stacks (aTHX); 1568 {
1569 dSP;
1570 ENTER;
1571 SAVETMPS;
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 if (ix)
1575 eval_sv (coderef, 0);
1576 else
1577 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1578 SPAGAIN;
1579 FREETMPS;
1580 LEAVE;
1581 PUTBACK;
1582 }
707 1583
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1584 if (!(coro->flags & CF_RUNNING))
709 1585 {
710 coro->mainstack = 0; 1586 save_perl (aTHX_ coro);
1587 load_perl (aTHX_ &temp);
1588 }
711 } 1589 }
1590}
712 1591
713 if (coro->sptr) 1592SV *
1593is_ready (Coro::State coro)
1594 PROTOTYPE: $
1595 ALIAS:
1596 is_ready = CF_READY
1597 is_running = CF_RUNNING
1598 is_new = CF_NEW
1599 is_destroyed = CF_DESTROYED
1600 CODE:
1601 RETVAL = boolSV (coro->flags & ix);
1602 OUTPUT:
1603 RETVAL
1604
1605void
1606api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1607
1608SV *
1609has_stack (Coro::State coro)
1610 PROTOTYPE: $
1611 CODE:
1612 RETVAL = boolSV (!!coro->cctx);
1613 OUTPUT:
1614 RETVAL
1615
1616int
1617is_traced (Coro::State coro)
1618 PROTOTYPE: $
1619 CODE:
1620 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1621 OUTPUT:
1622 RETVAL
1623
1624IV
1625rss (Coro::State coro)
1626 PROTOTYPE: $
1627 ALIAS:
1628 usecount = 1
1629 CODE:
1630 switch (ix)
1631 {
1632 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1633 case 1: RETVAL = coro->usecount; break;
1634 }
1635 OUTPUT:
1636 RETVAL
1637
1638
1639MODULE = Coro::State PACKAGE = Coro
1640
1641BOOT:
1642{
1643 int i;
1644
1645 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1646 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1647 av_async_pool = get_av ("Coro::async_pool", TRUE);
1648
1649 coro_current = get_sv ("Coro::current", FALSE);
1650 SvREADONLY_on (coro_current);
1651
1652 coro_stash = gv_stashpv ("Coro", TRUE);
1653
1654 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1655 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1656 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1657 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1658 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1659 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1660
1661 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1662 coro_ready[i] = newAV ();
1663
1664 {
1665 SV *sv = perl_get_sv("Coro::API", 1);
1666
1667 coroapi.schedule = api_schedule;
1668 coroapi.cede = api_cede;
1669 coroapi.cede_notself = api_cede_notself;
1670 coroapi.ready = api_ready;
1671 coroapi.is_ready = api_is_ready;
1672 coroapi.nready = &coro_nready;
1673 coroapi.current = coro_current;
1674
1675 GCoroAPI = &coroapi;
1676 sv_setiv (sv, (IV)&coroapi);
1677 SvREADONLY_on (sv);
1678 }
1679}
1680
1681void
1682_set_current (SV *current)
1683 PROTOTYPE: $
1684 CODE:
1685 SvREFCNT_dec (SvRV (coro_current));
1686 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1687
1688int
1689prio (Coro::State coro, int newprio = 0)
1690 ALIAS:
1691 nice = 1
1692 CODE:
1693{
1694 RETVAL = coro->prio;
1695
1696 if (items > 1)
714 { 1697 {
715 deallocate_stack (coro); 1698 if (ix)
1699 newprio = coro->prio - newprio;
1700
1701 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1702 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1703
716 coro->sptr = 0; 1704 coro->prio = newprio;
717 } 1705 }
1706}
1707 OUTPUT:
1708 RETVAL
718 1709
719 Safefree (coro); 1710SV *
1711ready (SV *self)
1712 PROTOTYPE: $
1713 CODE:
1714 RETVAL = boolSV (api_ready (self));
1715 OUTPUT:
1716 RETVAL
720 1717
1718int
1719nready (...)
1720 PROTOTYPE:
1721 CODE:
1722 RETVAL = coro_nready;
1723 OUTPUT:
1724 RETVAL
1725
1726# for async_pool speedup
721void 1727void
722flush() 1728_pool_1 (SV *cb)
723 CODE: 1729 CODE:
724#ifdef MAY_FLUSH 1730{
725 flush_padlist_cache (); 1731 struct coro *coro = SvSTATE (coro_current);
726#endif 1732 HV *hv = (HV *)SvRV (coro_current);
1733 AV *defav = GvAV (PL_defgv);
1734 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1735 AV *invoke_av;
1736 int i, len;
727 1737
728MODULE = Coro::State PACKAGE = Coro::Cont 1738 if (!invoke)
1739 croak ("\3terminate\2\n");
729 1740
730# this is slightly dirty 1741 SvREFCNT_dec (coro->saved_deffh);
1742 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1743
1744 hv_store (hv, "desc", sizeof ("desc") - 1,
1745 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1746
1747 invoke_av = (AV *)SvRV (invoke);
1748 len = av_len (invoke_av);
1749
1750 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1751
1752 if (len > 0)
1753 {
1754 av_fill (defav, len - 1);
1755 for (i = 0; i < len; ++i)
1756 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1757 }
1758
1759 SvREFCNT_dec (invoke);
1760}
731 1761
732void 1762void
733yield(...) 1763_pool_2 (SV *cb)
1764 CODE:
1765{
1766 struct coro *coro = SvSTATE (coro_current);
1767
1768 sv_setsv (cb, &PL_sv_undef);
1769
1770 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1771 coro->saved_deffh = 0;
1772
1773 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1774 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1775 croak ("\3terminate\2\n");
1776
1777 av_clear (GvAV (PL_defgv));
1778 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1779 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1780
1781 coro->prio = 0;
1782
1783 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1784 api_trace (coro_current, 0);
1785
1786 av_push (av_async_pool, newSVsv (coro_current));
1787}
1788
1789
1790MODULE = Coro::State PACKAGE = Coro::AIO
1791
1792SV *
1793_get_state ()
1794 CODE:
1795{
1796 struct io_state *data;
1797
1798 RETVAL = newSV (sizeof (struct io_state));
1799 data = (struct io_state *)SvPVX (RETVAL);
1800 SvCUR_set (RETVAL, sizeof (struct io_state));
1801 SvPOK_only (RETVAL);
1802
1803 data->errorno = errno;
1804 data->laststype = PL_laststype;
1805 data->laststatval = PL_laststatval;
1806 data->statcache = PL_statcache;
1807}
1808 OUTPUT:
1809 RETVAL
1810
1811void
1812_set_state (char *data_)
734 PROTOTYPE: @ 1813 PROTOTYPE: $
735 CODE: 1814 CODE:
736 static SV *returnstk; 1815{
737 SV *sv; 1816 struct io_state *data = (void *)data_;
738 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next;
740 1817
741 if (!returnstk) 1818 errno = data->errorno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1819 PL_laststype = data->laststype;
1820 PL_laststatval = data->laststatval;
1821 PL_statcache = data->statcache;
1822}
743 1823
744 /* set up @_ -- ugly */
745 av_clear (defav);
746 av_fill (defav, items - 1);
747 while (items--)
748 av_store (defav, items, SvREFCNT_inc (ST(items)));
749
750 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
751 sv = av_pop ((AV *)SvRV (returnstk));
752 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
753 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
754 SvREFCNT_dec (sv);
755
756 transfer(aTHX_ prev, next, 0);
757

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