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Comparing Coro/Coro/State.xs (file contents):
Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs.
Revision 1.219 by root, Tue Dec 4 19:33:45 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
27# include <limits.h>
28# ifndef PAGESIZE
29# define PAGESIZE pagesize
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
31static long pagesize;
32# else
33# define BOOT_PAGESIZE (void)0
34# endif
35#else
36# define PAGESIZE 0
37# define BOOT_PAGESIZE (void)0
38#endif
11 39
12#define MAY_FLUSH /* increases codesize */ 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
13 46
14#define TRANSFER_SAVE_DEFAV 0x00000001 47/* the maximum number of idle cctx that will be pooled */
15#define TRANSFER_SAVE_DEFSV 0x00000002 48#define MAX_IDLE_CCTX 8
16#define TRANSFER_SAVE_ERRSV 0x00000004
17#define TRANSFER_SAVE_CCTXT 0x00000008
18 49
19#define TRANSFER_SAVE_ALL -1 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)))))
20 55
21#define SUB_INIT "Coro::State::initialize" 56#if !PERL_VERSION_ATLEAST (5,6,0)
22#define UCORO_STATE "_coro_state" 57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
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
23 76
77/* 5.8.7 */
78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD
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
106#define STACKLEVEL ((void *)&stacklevel)
107
108#define IN_DESTRUCT (PL_main_cv == Nullcv)
109
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/* helper storage struct for Coro::AIO */
137struct io_state
138{
139 int errorno;
140 I32 laststype;
141 int laststatval;
142 Stat_t statcache;
143};
144
145static size_t coro_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */
151
152static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook;
155static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */
157
158/* async_pool helper stuff */
159static SV *sv_pool_rss;
160static SV *sv_pool_size;
161static AV *av_async_pool;
162
163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle;
165
166enum {
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
175/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx {
177 struct coro_cctx *next;
178
179 /* the stack */
180 void *sptr;
181 size_t ssize;
182
183 /* cpu state */
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
186 JMPENV *top_env;
187 coro_context cctx;
188
189#if CORO_USE_VALGRIND
190 int valgrind_id;
191#endif
192 unsigned char flags;
193} coro_cctx;
194
195enum {
196 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200};
201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct {
204 SV *defsv;
205 AV *defav;
206 SV *errsv;
207 SV *irsgv;
208#define VAR(name,type) type name;
209# include "state.h"
210#undef VAR
211} perl_slots;
212
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214
215/* this is a structure representing a perl-level coroutine */
24struct coro { 216struct coro {
25 /* the optional C context */ 217 /* the c coroutine allocated to this perl coroutine, if any */
26 coro_context cctx; 218 coro_cctx *cctx;
27 void *sptr;
28 long ssize;
29 219
30 /* optionally saved, might be zero */ 220 /* process data */
31 AV *defav;
32 SV *defsv;
33 SV *errsv;
34
35 /* saved global state not related to stacks */
36 U8 dowarn;
37
38 /* the stacks and related info (callchain etc..) */
39 PERL_SI *curstackinfo;
40 AV *curstack;
41 AV *mainstack; 221 AV *mainstack;
42 SV **stack_sp; 222 perl_slots *slot; /* basically the saved sp */
43 OP *op;
44 SV **curpad;
45 SV **stack_base;
46 SV **stack_max;
47 SV **tmps_stack;
48 I32 tmps_floor;
49 I32 tmps_ix;
50 I32 tmps_max;
51 I32 *markstack;
52 I32 *markstack_ptr;
53 I32 *markstack_max;
54 I32 *scopestack;
55 I32 scopestack_ix;
56 I32 scopestack_max;
57 ANY *savestack;
58 I32 savestack_ix;
59 I32 savestack_max;
60 OP **retstack;
61 I32 retstack_ix;
62 I32 retstack_max;
63 COP *curcop;
64 JMPENV start_env;
65 JMPENV *top_env;
66 223
67 /* data associated with this coroutine (initial args) */ 224 AV *args; /* data associated with this coroutine (initial args) */
68 AV *args; 225 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */
228
229 /* statistics */
230 int usecount; /* number of transfers to this coro */
231
232 /* coro process data */
233 int prio;
234 SV *throw; /* exception to be thrown */
235
236 /* async_pool */
237 SV *saved_deffh;
238
239 /* linked list */
240 struct coro *next, *prev;
69}; 241};
70 242
71typedef struct coro *Coro__State; 243typedef struct coro *Coro__State;
72typedef struct coro *Coro__State_or_hashref; 244typedef struct coro *Coro__State_or_hashref;
73 245
74static AV *main_mainstack; /* used to differentiate between $main and others */ 246/** Coro ********************************************************************/
75static HV *coro_state_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static HV *padlist_cache;
79 247
80/* mostly copied from op.c:cv_clone2 */ 248#define PRIO_MAX 3
81STATIC AV * 249#define PRIO_HIGH 1
82clone_padlist (AV *protopadlist) 250#define PRIO_NORMAL 0
251#define PRIO_LOW -1
252#define PRIO_IDLE -3
253#define PRIO_MIN -4
254
255/* for Coro.pm */
256static SV *coro_current;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
258static int coro_nready;
259static struct coro *coro_first;
260
261/** lowlevel stuff **********************************************************/
262
263static SV *
264coro_get_sv (pTHX_ const char *name, int create)
83{ 265{
84 AV *av; 266#if PERL_VERSION_ATLEAST (5,9,0)
85 I32 ix; 267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
86 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 268 get_sv (name, create);
87 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 269#endif
88 SV **pname = AvARRAY (protopad_name); 270 return get_sv (name, create);
89 SV **ppad = AvARRAY (protopad); 271}
90 I32 fname = AvFILLp (protopad_name); 272
91 I32 fpad = AvFILLp (protopad); 273static AV *
274coro_get_av (pTHX_ const char *name, int create)
275{
276#if PERL_VERSION_ATLEAST (5,9,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create);
279#endif
280 return get_av (name, create);
281}
282
283static HV *
284coro_get_hv (pTHX_ const char *name, int create)
285{
286#if PERL_VERSION_ATLEAST (5,9,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create);
289#endif
290 return get_hv (name, create);
291}
292
293static AV *
294coro_clone_padlist (pTHX_ CV *cv)
295{
296 AV *padlist = CvPADLIST (cv);
92 AV *newpadlist, *newpad_name, *newpad; 297 AV *newpadlist, *newpad;
93 SV **npad;
94
95 newpad_name = newAV ();
96 for (ix = fname; ix >= 0; ix--)
97 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
98
99 newpad = newAV ();
100 av_fill (newpad, AvFILLp (protopad));
101 npad = AvARRAY (newpad);
102 298
103 newpadlist = newAV (); 299 newpadlist = newAV ();
104 AvREAL_off (newpadlist); 300 AvREAL_off (newpadlist);
105 av_store (newpadlist, 0, (SV *) newpad_name); 301#if PERL_VERSION_ATLEAST (5,9,0)
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
303#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist);
308
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
106 av_store (newpadlist, 1, (SV *) newpad); 310 av_store (newpadlist, 1, (SV *)newpad);
107 311
108 av = newAV (); /* will be @_ */ 312 return newpadlist;
109 av_extend (av, 0); 313}
110 av_store (newpad, 0, (SV *) av);
111 AvFLAGS (av) = AVf_REIFY;
112 314
113 for (ix = fpad; ix > 0; ix--) 315static void
316free_padlist (pTHX_ AV *padlist)
317{
318 /* may be during global destruction */
319 if (SvREFCNT (padlist))
114 { 320 {
115 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 321 I32 i = AvFILLp (padlist);
116 if (namesv && namesv != &PL_sv_undef) 322 while (i >= 0)
117 { 323 {
118 char *name = SvPVX (namesv); /* XXX */ 324 SV **svp = av_fetch (padlist, i--, FALSE);
119 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 325 if (svp)
120 { /* lexical from outside? */
121 npad[ix] = SvREFCNT_inc (ppad[ix]);
122 } 326 {
123 else
124 { /* our own lexical */
125 SV *sv; 327 SV *sv;
126 if (*name == '&') 328 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
127 sv = SvREFCNT_inc (ppad[ix]); 329 SvREFCNT_dec (sv);
128 else if (*name == '@') 330
129 sv = (SV *) newAV (); 331 SvREFCNT_dec (*svp);
130 else if (*name == '%')
131 sv = (SV *) newHV ();
132 else
133 sv = NEWSV (0, 0);
134 if (!SvPADBUSY (sv))
135 SvPADMY_on (sv);
136 npad[ix] = sv;
137 } 332 }
138 } 333 }
139 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
140 {
141 npad[ix] = SvREFCNT_inc (ppad[ix]);
142 }
143 else
144 {
145 SV *sv = NEWSV (0, 0);
146 SvPADTMP_on (sv);
147 npad[ix] = sv;
148 }
149 }
150 334
151#if 0 /* return -ENOTUNDERSTOOD */
152 /* Now that vars are all in place, clone nested closures. */
153
154 for (ix = fpad; ix > 0; ix--) {
155 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
156 if (namesv
157 && namesv != &PL_sv_undef
158 && !(SvFLAGS(namesv) & SVf_FAKE)
159 && *SvPVX(namesv) == '&'
160 && CvCLONE(ppad[ix]))
161 {
162 CV *kid = cv_clone((CV*)ppad[ix]);
163 SvREFCNT_dec(ppad[ix]);
164 CvCLONE_on(kid);
165 SvPADMY_on(kid);
166 npad[ix] = (SV*)kid;
167 }
168 }
169#endif
170
171 return newpadlist;
172}
173
174#ifdef MAY_FLUSH
175STATIC AV *
176free_padlist (AV *padlist)
177{
178 /* may be during global destruction */
179 if (SvREFCNT(padlist))
180 {
181 I32 i = AvFILLp(padlist);
182 while (i >= 0)
183 {
184 SV **svp = av_fetch(padlist, i--, FALSE);
185 SV *sv = svp ? *svp : Nullsv;
186 if (sv)
187 SvREFCNT_dec(sv);
188 }
189
190 SvREFCNT_dec((SV*)padlist); 335 SvREFCNT_dec ((SV*)padlist);
191 } 336 }
192} 337}
193#endif 338
339static int
340coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
341{
342 AV *padlist;
343 AV *av = (AV *)mg->mg_obj;
344
345 /* casting is fun. */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
347 free_padlist (aTHX_ padlist);
348
349 return 0;
350}
351
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353#define CORO_MAGIC_type_state PERL_MAGIC_ext
354
355static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0,
357 coro_cv_free
358};
359
360#define CORO_MAGIC(sv,type) \
361 SvMAGIC (sv) \
362 ? SvMAGIC (sv)->mg_type == type \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0
366
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370static struct coro *
371SvSTATE_ (pTHX_ SV *coro)
372{
373 HV *stash;
374 MAGIC *mg;
375
376 if (SvROK (coro))
377 coro = SvRV (coro);
378
379 if (expect_false (SvTYPE (coro) != SVt_PVHV))
380 croak ("Coro::State object required");
381
382 stash = SvSTASH (coro);
383 if (expect_false (stash != coro_stash && stash != coro_state_stash))
384 {
385 /* very slow, but rare, check */
386 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387 croak ("Coro::State object required");
388 }
389
390 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr;
392}
393
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
194 395
195/* the next two functions merely cache the padlists */ 396/* the next two functions merely cache the padlists */
196STATIC void 397static void
197get_padlist (CV *cv) 398get_padlist (pTHX_ CV *cv)
198{ 399{
199 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 400 MAGIC *mg = CORO_MAGIC_cv (cv);
401 AV *av;
200 402
201 if (he && AvFILLp ((AV *)*he) >= 0) 403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
202 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
203 else 405 else
204 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
205}
206
207STATIC void
208put_padlist (CV *cv)
209{
210 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
211
212 if (SvTYPE (*he) != SVt_PVAV)
213 { 406 {
407#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */
409 CV *cp = Perl_cv_clone (cv);
410 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0;
214 SvREFCNT_dec (*he); 412 SvREFCNT_dec (cp);
215 *he = (SV *)newAV (); 413#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
415#endif
216 } 416 }
217
218 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
219} 417}
220 418
221#ifdef MAY_FLUSH
222STATIC void
223flush_padlist_cache ()
224{
225 HV *hv = padlist_cache;
226 padlist_cache = newHV ();
227
228 if (hv_iterinit (hv))
229 {
230 HE *he;
231 AV *padlist;
232
233 while (!!(he = hv_iternext (hv)))
234 {
235 AV *av = (AV *)HeVAL(he);
236
237 /* casting is fun. */
238 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
239 free_padlist (padlist);
240 }
241 }
242
243 SvREFCNT_dec (hv);
244}
245#endif
246
247#define SB do {
248#define SE } while (0)
249
250#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
251#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
252
253#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
254
255static void 419static void
420put_padlist (pTHX_ CV *cv)
421{
422 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
424
425 if (expect_false (!mg))
426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
427
428 av = (AV *)mg->mg_obj;
429
430 if (expect_false (AvFILLp (av) >= AvMAX (av)))
431 av_extend (av, AvMAX (av) + 1);
432
433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
434}
435
436/** load & save, init *******************************************************/
437
438static void
256load_state(pTHX_ Coro__State c) 439load_perl (pTHX_ Coro__State c)
257{ 440{
258 PL_dowarn = c->dowarn; 441 perl_slots *slot = c->slot;
442 c->slot = 0;
259 443
260 PL_curstackinfo = c->curstackinfo;
261 PL_curstack = c->curstack;
262 PL_mainstack = c->mainstack; 444 PL_mainstack = c->mainstack;
263 PL_stack_sp = c->stack_sp;
264 PL_op = c->op;
265 PL_curpad = c->curpad;
266 PL_stack_base = c->stack_base;
267 PL_stack_max = c->stack_max;
268 PL_tmps_stack = c->tmps_stack;
269 PL_tmps_floor = c->tmps_floor;
270 PL_tmps_ix = c->tmps_ix;
271 PL_tmps_max = c->tmps_max;
272 PL_markstack = c->markstack;
273 PL_markstack_ptr = c->markstack_ptr;
274 PL_markstack_max = c->markstack_max;
275 PL_scopestack = c->scopestack;
276 PL_scopestack_ix = c->scopestack_ix;
277 PL_scopestack_max = c->scopestack_max;
278 PL_savestack = c->savestack;
279 PL_savestack_ix = c->savestack_ix;
280 PL_savestack_max = c->savestack_max;
281 PL_retstack = c->retstack;
282 PL_retstack_ix = c->retstack_ix;
283 PL_retstack_max = c->retstack_max;
284 PL_curcop = c->curcop;
285 PL_start_env = c->start_env;
286 PL_top_env = c->top_env;
287 445
288 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 446 GvSV (PL_defgv) = slot->defsv;
289 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 447 GvAV (PL_defgv) = slot->defav;
290 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 448 GvSV (PL_errgv) = slot->errsv;
449 GvSV (irsgv) = slot->irsgv;
450
451 #define VAR(name,type) PL_ ## name = slot->name;
452 # include "state.h"
453 #undef VAR
291 454
292 { 455 {
293 dSP; 456 dSP;
457
294 CV *cv; 458 CV *cv;
295 459
296 /* now do the ugly restore mess */ 460 /* now do the ugly restore mess */
297 while ((cv = (CV *)POPs)) 461 while (expect_true (cv = (CV *)POPs))
298 { 462 {
299 AV *padlist = (AV *)POPs;
300
301 if (padlist)
302 {
303 put_padlist (cv); /* mark this padlist as available */ 463 put_padlist (aTHX_ cv); /* mark this padlist as available */
304 CvPADLIST(cv) = padlist; 464 CvDEPTH (cv) = PTR2IV (POPs);
305#ifdef USE_THREADS 465 CvPADLIST (cv) = (AV *)POPs;
306 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
307#endif
308 }
309
310 ++CvDEPTH(cv);
311 } 466 }
312 467
313 PUTBACK; 468 PUTBACK;
314 } 469 }
315} 470}
316 471
317static void 472static void
318save_state(pTHX_ Coro__State c, int flags) 473save_perl (pTHX_ Coro__State c)
319{ 474{
320 { 475 {
321 dSP; 476 dSP;
322 I32 cxix = cxstack_ix; 477 I32 cxix = cxstack_ix;
323 PERL_CONTEXT *ccstk = cxstack; 478 PERL_CONTEXT *ccstk = cxstack;
… …
326 /* 481 /*
327 * the worst thing you can imagine happens first - we have to save 482 * the worst thing you can imagine happens first - we have to save
328 * (and reinitialize) all cv's in the whole callchain :( 483 * (and reinitialize) all cv's in the whole callchain :(
329 */ 484 */
330 485
331 PUSHs (Nullsv); 486 XPUSHs (Nullsv);
332 /* this loop was inspired by pp_caller */ 487 /* this loop was inspired by pp_caller */
333 for (;;) 488 for (;;)
334 { 489 {
335 do 490 while (expect_true (cxix >= 0))
336 { 491 {
337 PERL_CONTEXT *cx = &ccstk[cxix--]; 492 PERL_CONTEXT *cx = &ccstk[cxix--];
338 493
339 if (CxTYPE(cx) == CXt_SUB) 494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
340 { 495 {
341 CV *cv = cx->blk_sub.cv; 496 CV *cv = cx->blk_sub.cv;
497
342 if (CvDEPTH(cv)) 498 if (expect_true (CvDEPTH (cv)))
343 { 499 {
344#ifdef USE_THREADS
345 /*XPUSHs ((SV *)CvOWNER(cv));*/
346 /*CvOWNER(cv) = 0;*/
347 /*error must unlock this cv etc.. etc...*/
348#endif
349 EXTEND (SP, CvDEPTH(cv)*2); 500 EXTEND (SP, 3);
350
351 while (--CvDEPTH(cv))
352 {
353 /* this tells the restore code to increment CvDEPTH */
354 PUSHs (Nullsv);
355 PUSHs ((SV *)cv);
356 }
357
358 PUSHs ((SV *)CvPADLIST(cv)); 501 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
359 PUSHs ((SV *)cv); 503 PUSHs ((SV *)cv);
360 504
361 get_padlist (cv); /* this is a monster */ 505 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv);
362 } 507 }
363 } 508 }
364 else if (CxTYPE(cx) == CXt_FORMAT)
365 {
366 /* I never used formats, so how should I know how these are implemented? */
367 /* my bold guess is as a simple, plain sub... */
368 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
369 }
370 } 509 }
371 while (cxix >= 0);
372 510
373 if (top_si->si_type == PERLSI_MAIN) 511 if (expect_true (top_si->si_type == PERLSI_MAIN))
374 break; 512 break;
375 513
376 top_si = top_si->si_prev; 514 top_si = top_si->si_prev;
377 ccstk = top_si->si_cxstack; 515 ccstk = top_si->si_cxstack;
378 cxix = top_si->si_cxix; 516 cxix = top_si->si_cxix;
379 } 517 }
380 518
381 PUTBACK; 519 PUTBACK;
382 } 520 }
383 521
384 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 522 /* allocate some space on the context stack for our purposes */
385 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 523 /* we manually unroll here, as usually 2 slots is enough */
386 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 524 if (SLOT_COUNT >= 1) CXINC;
525 if (SLOT_COUNT >= 2) CXINC;
526 if (SLOT_COUNT >= 3) CXINC;
527 {
528 int i;
529 for (i = 3; i < SLOT_COUNT; ++i)
530 CXINC;
531 }
532 cxstack_ix -= SLOT_COUNT; /* undo allocation */
387 533
388 /* I have not the slightest idea of why av_reify is necessary */
389 /* but if it's missing the defav contents magically get replaced sometimes */
390 if (c->defav)
391 av_reify (c->defav);
392
393 c->dowarn = PL_dowarn;
394
395 c->curstackinfo = PL_curstackinfo;
396 c->curstack = PL_curstack;
397 c->mainstack = PL_mainstack; 534 c->mainstack = PL_mainstack;
398 c->stack_sp = PL_stack_sp; 535
399 c->op = PL_op; 536 {
400 c->curpad = PL_curpad; 537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
401 c->stack_base = PL_stack_base; 538
402 c->stack_max = PL_stack_max; 539 slot->defav = GvAV (PL_defgv);
403 c->tmps_stack = PL_tmps_stack; 540 slot->defsv = DEFSV;
404 c->tmps_floor = PL_tmps_floor; 541 slot->errsv = ERRSV;
405 c->tmps_ix = PL_tmps_ix; 542 slot->irsgv = GvSV (irsgv);
406 c->tmps_max = PL_tmps_max; 543
407 c->markstack = PL_markstack; 544 #define VAR(name,type) slot->name = PL_ ## name;
408 c->markstack_ptr = PL_markstack_ptr; 545 # include "state.h"
409 c->markstack_max = PL_markstack_max; 546 #undef VAR
410 c->scopestack = PL_scopestack; 547 }
411 c->scopestack_ix = PL_scopestack_ix;
412 c->scopestack_max = PL_scopestack_max;
413 c->savestack = PL_savestack;
414 c->savestack_ix = PL_savestack_ix;
415 c->savestack_max = PL_savestack_max;
416 c->retstack = PL_retstack;
417 c->retstack_ix = PL_retstack_ix;
418 c->retstack_max = PL_retstack_max;
419 c->curcop = PL_curcop;
420 c->start_env = PL_start_env;
421 c->top_env = PL_top_env;
422} 548}
423 549
424/* 550/*
425 * allocate various perl stacks. This is an exact copy 551 * allocate various perl stacks. This is an exact copy
426 * of perl.c:init_stacks, except that it uses less memory 552 * of perl.c:init_stacks, except that it uses less memory
427 * on the assumption that coroutines do not usually need 553 * on the (sometimes correct) assumption that coroutines do
428 * a lot of stackspace. 554 * not usually need a lot of stackspace.
429 */ 555 */
430STATIC void 556#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks
558#else
559static void
431coro_init_stacks (pTHX) 560coro_init_stacks (pTHX)
432{ 561{
433 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 562 PL_curstackinfo = new_stackinfo(32, 8);
434 PL_curstackinfo->si_type = PERLSI_MAIN; 563 PL_curstackinfo->si_type = PERLSI_MAIN;
435 PL_curstack = PL_curstackinfo->si_stack; 564 PL_curstack = PL_curstackinfo->si_stack;
436 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
437 566
438 PL_stack_base = AvARRAY(PL_curstack); 567 PL_stack_base = AvARRAY(PL_curstack);
439 PL_stack_sp = PL_stack_base; 568 PL_stack_sp = PL_stack_base;
440 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 569 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
441 570
442 New(50,PL_tmps_stack,64,SV*); 571 New(50,PL_tmps_stack,32,SV*);
443 PL_tmps_floor = -1; 572 PL_tmps_floor = -1;
444 PL_tmps_ix = -1; 573 PL_tmps_ix = -1;
445 PL_tmps_max = 64; 574 PL_tmps_max = 32;
446 575
447 New(54,PL_markstack,12,I32); 576 New(54,PL_markstack,16,I32);
448 PL_markstack_ptr = PL_markstack; 577 PL_markstack_ptr = PL_markstack;
449 PL_markstack_max = PL_markstack + 12; 578 PL_markstack_max = PL_markstack + 16;
450 579
580#ifdef SET_MARK_OFFSET
451 SET_MARK_OFFSET; 581 SET_MARK_OFFSET;
582#endif
452 583
453 New(54,PL_scopestack,12,I32); 584 New(54,PL_scopestack,8,I32);
454 PL_scopestack_ix = 0; 585 PL_scopestack_ix = 0;
455 PL_scopestack_max = 12; 586 PL_scopestack_max = 8;
456 587
457 New(54,PL_savestack,64,ANY); 588 New(54,PL_savestack,24,ANY);
458 PL_savestack_ix = 0; 589 PL_savestack_ix = 0;
459 PL_savestack_max = 64; 590 PL_savestack_max = 24;
460 591
592#if !PERL_VERSION_ATLEAST (5,9,0)
461 New(54,PL_retstack,8,OP*); 593 New(54,PL_retstack,4,OP*);
462 PL_retstack_ix = 0; 594 PL_retstack_ix = 0;
463 PL_retstack_max = 8; 595 PL_retstack_max = 4;
596#endif
464} 597}
598#endif
465 599
466/* 600/*
467 * destroy the stacks, the callchain etc... 601 * destroy the stacks, the callchain etc...
468 * still there is a memleak of 128 bytes...
469 */ 602 */
470STATIC void 603static void
471destroy_stacks(pTHX) 604coro_destroy_stacks (pTHX)
472{ 605{
473 /* is this ugly, I ask? */
474 while (PL_scopestack_ix)
475 LEAVE;
476
477 /* sure it is, but more important: is it correct?? :/ */
478 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
479 FREETMPS;
480
481 while (PL_curstackinfo->si_next) 606 while (PL_curstackinfo->si_next)
482 PL_curstackinfo = PL_curstackinfo->si_next; 607 PL_curstackinfo = PL_curstackinfo->si_next;
483 608
484 while (PL_curstackinfo) 609 while (PL_curstackinfo)
485 { 610 {
486 PERL_SI *p = PL_curstackinfo->si_prev; 611 PERL_SI *p = PL_curstackinfo->si_prev;
487 612
488 { 613 if (!IN_DESTRUCT)
489 dSP;
490 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
491 PUTBACK; /* possibly superfluous */
492 }
493
494 dounwind(-1);
495
496 SvREFCNT_dec(PL_curstackinfo->si_stack); 614 SvREFCNT_dec (PL_curstackinfo->si_stack);
615
497 Safefree(PL_curstackinfo->si_cxstack); 616 Safefree (PL_curstackinfo->si_cxstack);
498 Safefree(PL_curstackinfo); 617 Safefree (PL_curstackinfo);
499 PL_curstackinfo = p; 618 PL_curstackinfo = p;
500 } 619 }
501 620
502 Safefree(PL_tmps_stack); 621 Safefree (PL_tmps_stack);
503 Safefree(PL_markstack); 622 Safefree (PL_markstack);
504 Safefree(PL_scopestack); 623 Safefree (PL_scopestack);
505 Safefree(PL_savestack); 624 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0)
506 Safefree(PL_retstack); 626 Safefree (PL_retstack);
507}
508
509static void
510allocate_stack (Coro__State ctx)
511{
512#ifdef HAVE_MMAP
513 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
514 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
515 if (ctx->sptr == (void *)-1)
516#endif 627#endif
517 { 628}
518 /*FIXME*//*D*//* reasonable stack size! */ 629
519 ctx->ssize = 4096 * sizeof (long); 630static size_t
520 New (0, ctx->sptr, 4096, long); 631coro_rss (pTHX_ struct coro *coro)
632{
633 size_t rss = sizeof (*coro);
634
635 if (coro->mainstack)
521 } 636 {
522} 637 perl_slots tmp_slot;
638 perl_slots *slot;
523 639
640 if (coro->flags & CF_RUNNING)
641 {
642 slot = &tmp_slot;
643
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR
647 }
648 else
649 slot = coro->slot;
650
651 rss += sizeof (slot->curstackinfo);
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 }
663
664 return rss;
665}
666
667/** coroutine stack handling ************************************************/
668
669#if 0
670static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
671
672/*
673 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide
676 * readback here.
677 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
678 * not expecting this to actually change the hook. This is a potential problem
679 * when a schedule happens then, but we ignore this.
680 */
524static void 681static int
525deallocate_stack (Coro__State ctx) 682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
526{ 683{
527#ifdef HAVE_MMAP 684 return orig_sigelem_get (aTHX_ sv, mg);
528 munmap (ctx->sptr, ctx->ssize); 685 const char *s = MgPV_nolen_const (mg);
529#else
530 Safefree (ctx->sptr);
531#endif
532}
533 686
534/* might go away together with optional SAVE_CCTXT */ 687 if (*s == '_')
688 {
689 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
690 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
691 }
692
693 return orig_sigelem_get (aTHX_ sv, mg);
694}
695#endif
696
535static void 697static void
536setup_coro (void *arg) 698coro_setup (pTHX_ struct coro *coro)
537{ 699{
538 /* 700 /*
539 * emulate part of the perl startup here. 701 * emulate part of the perl startup here.
540 */ 702 */
703 coro_init_stacks (aTHX);
704
705 PL_runops = RUNOPS_DEFAULT;
706 PL_curcop = &PL_compiling;
707 PL_in_eval = EVAL_NULL;
708 PL_comppad = 0;
709 PL_curpm = 0;
710 PL_curpad = 0;
711 PL_localizing = 0;
712 PL_dirty = 0;
713 PL_restartop = 0;
714
715 /* recreate the die/warn hooks */
716 PL_diehook = 0;
717 hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
718 PL_diehook = SvREFCNT_inc (rv_diehook);
719
720 PL_warnhook = 0;
721 hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
722 PL_warnhook = SvREFCNT_inc (rv_warnhook);
723
724 GvSV (PL_defgv) = newSV (0);
725 GvAV (PL_defgv) = coro->args; coro->args = 0;
726 GvSV (PL_errgv) = newSV (0);
727 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
728 PL_rs = newSVsv (GvSV (irsgv));
729 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
730
731 {
732 dSP;
733 LOGOP myop;
734
735 Zero (&myop, 1, LOGOP);
736 myop.op_next = Nullop;
737 myop.op_flags = OPf_WANT_VOID;
738
739 PUSHMARK (SP);
740 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
741 PUTBACK;
742 PL_op = (OP *)&myop;
743 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
744 SPAGAIN;
745 }
746
747 /* this newly created coroutine might be run on an existing cctx which most
748 * likely was suspended in set_stacklevel, called from entersub.
749 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
750 * so we ENTER here for symmetry
751 */
752 ENTER;
753}
754
755static void
756coro_destroy (pTHX_ struct coro *coro)
757{
758 if (!IN_DESTRUCT)
759 {
760 /* restore all saved variables and stuff */
761 LEAVE_SCOPE (0);
762 assert (PL_tmps_floor == -1);
763
764 /* free all temporaries */
765 FREETMPS;
766 assert (PL_tmps_ix == -1);
767
768 /* unwind all extra stacks */
769 POPSTACK_TO (PL_mainstack);
770
771 /* unwind main stack */
772 dounwind (-1);
773 }
774
775 SvREFCNT_dec (GvSV (PL_defgv));
776 SvREFCNT_dec (GvAV (PL_defgv));
777 SvREFCNT_dec (GvSV (PL_errgv));
778 SvREFCNT_dec (PL_defoutgv);
779 SvREFCNT_dec (PL_rs);
780 SvREFCNT_dec (GvSV (irsgv));
781
782 SvREFCNT_dec (PL_diehook);
783 SvREFCNT_dec (PL_warnhook);
784
785 SvREFCNT_dec (coro->saved_deffh);
786 SvREFCNT_dec (coro->throw);
787
788 coro_destroy_stacks (aTHX);
789}
790
791static void
792free_coro_mortal (pTHX)
793{
794 if (expect_true (coro_mortal))
795 {
796 SvREFCNT_dec (coro_mortal);
797 coro_mortal = 0;
798 }
799}
800
801static int
802runops_trace (pTHX)
803{
804 COP *oldcop = 0;
805 int oldcxix = -2;
806 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
807 coro_cctx *cctx = coro->cctx;
808
809 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
810 {
811 PERL_ASYNC_CHECK ();
812
813 if (cctx->flags & CC_TRACE_ALL)
814 {
815 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
816 {
817 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
818 SV **bot, **top;
819 AV *av = newAV (); /* return values */
820 SV **cb;
821 dSP;
822
823 GV *gv = CvGV (cx->blk_sub.cv);
824 SV *fullname = sv_2mortal (newSV (0));
825 if (isGV (gv))
826 gv_efullname3 (fullname, gv, 0);
827
828 bot = PL_stack_base + cx->blk_oldsp + 1;
829 top = cx->blk_gimme == G_ARRAY ? SP + 1
830 : cx->blk_gimme == G_SCALAR ? bot + 1
831 : bot;
832
833 av_extend (av, top - bot);
834 while (bot < top)
835 av_push (av, SvREFCNT_inc (*bot++));
836
837 PL_runops = RUNOPS_DEFAULT;
838 ENTER;
839 SAVETMPS;
840 EXTEND (SP, 3);
841 PUSHMARK (SP);
842 PUSHs (&PL_sv_no);
843 PUSHs (fullname);
844 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
845 PUTBACK;
846 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
847 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
848 SPAGAIN;
849 FREETMPS;
850 LEAVE;
851 PL_runops = runops_trace;
852 }
853
854 if (oldcop != PL_curcop)
855 {
856 oldcop = PL_curcop;
857
858 if (PL_curcop != &PL_compiling)
859 {
860 SV **cb;
861
862 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
863 {
864 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
865
866 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
867 {
868 runops_proc_t old_runops = PL_runops;
869 dSP;
870 GV *gv = CvGV (cx->blk_sub.cv);
871 SV *fullname = sv_2mortal (newSV (0));
872
873 if (isGV (gv))
874 gv_efullname3 (fullname, gv, 0);
875
876 PL_runops = RUNOPS_DEFAULT;
877 ENTER;
878 SAVETMPS;
879 EXTEND (SP, 3);
880 PUSHMARK (SP);
881 PUSHs (&PL_sv_yes);
882 PUSHs (fullname);
883 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
884 PUTBACK;
885 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
886 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
887 SPAGAIN;
888 FREETMPS;
889 LEAVE;
890 PL_runops = runops_trace;
891 }
892
893 oldcxix = cxstack_ix;
894 }
895
896 if (cctx->flags & CC_TRACE_LINE)
897 {
898 dSP;
899
900 PL_runops = RUNOPS_DEFAULT;
901 ENTER;
902 SAVETMPS;
903 EXTEND (SP, 3);
904 PL_runops = RUNOPS_DEFAULT;
905 PUSHMARK (SP);
906 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
907 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
908 PUTBACK;
909 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
910 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
911 SPAGAIN;
912 FREETMPS;
913 LEAVE;
914 PL_runops = runops_trace;
915 }
916 }
917 }
918 }
919 }
920
921 TAINT_NOT;
922 return 0;
923}
924
925/* inject a fake call to Coro::State::_cctx_init into the execution */
926/* _cctx_init should be careful, as it could be called at almost any time */
927/* during execution of a perl program */
928static void NOINLINE
929cctx_prepare (pTHX_ coro_cctx *cctx)
930{
541 dSP; 931 dSP;
542 Coro__State ctx = (Coro__State)arg; 932 LOGOP myop;
543 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
544 933
545 coro_init_stacks (aTHX); 934 PL_top_env = &PL_start_env;
546 JMPENV_BOOTSTRAP; 935
936 if (cctx->flags & CC_TRACE)
937 PL_runops = runops_trace;
938
939 Zero (&myop, 1, LOGOP);
940 myop.op_next = PL_op;
941 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
942
943 PUSHMARK (SP);
944 EXTEND (SP, 2);
945 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
946 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
947 PUTBACK;
948 PL_op = (OP *)&myop;
949 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
547 SPAGAIN; 950 SPAGAIN;
951}
548 952
549 /*PL_curcop = 0;*/ 953/*
550 SvREFCNT_dec (GvAV (PL_defgv)); 954 * this is a _very_ stripped down perl interpreter ;)
551 GvAV (PL_defgv) = ctx->args; 955 */
956static void
957cctx_run (void *arg)
958{
959 dTHX;
552 960
553 if (ctx->sptr) 961 /* cctx_run is the alternative tail of transfer(), so unlock here. */
962 UNLOCK;
963
964 /* we now skip the entersub that lead to transfer() */
965 PL_op = PL_op->op_next;
966
967 /* inject a fake subroutine call to cctx_init */
968 cctx_prepare (aTHX_ (coro_cctx *)arg);
969
970 /* somebody or something will hit me for both perl_run and PL_restartop */
971 PL_restartop = PL_op;
972 perl_run (PL_curinterp);
973
974 /*
975 * If perl-run returns we assume exit() was being called or the coro
976 * fell off the end, which seems to be the only valid (non-bug)
977 * reason for perl_run to return. We try to exit by jumping to the
978 * bootstrap-time "top" top_env, as we cannot restore the "main"
979 * coroutine as Coro has no such concept
980 */
981 PL_top_env = main_top_env;
982 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
983}
984
985static coro_cctx *
986cctx_new ()
987{
988 coro_cctx *cctx;
989 void *stack_start;
990 size_t stack_size;
991
992 ++cctx_count;
993
994 Newz (0, cctx, 1, coro_cctx);
995
996#if HAVE_MMAP
997 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
998 /* mmap supposedly does allocate-on-write for us */
999 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1000
1001 if (cctx->sptr != (void *)-1)
554 { 1002 {
555 PUSHMARK(SP); 1003# if CORO_STACKGUARD
556 PUTBACK; 1004 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
557 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1005# endif
558 croak ("FATAL: CCTXT coroutine returned!"); 1006 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1007 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1008 cctx->flags |= CC_MAPPED;
559 } 1009 }
560 else 1010 else
561 { 1011#endif
562 UNOP myop;
563
564 PL_op = (OP *)&myop;
565
566 Zero(&myop, 1, UNOP);
567 myop.op_next = Nullop;
568 myop.op_flags = OPf_WANT_VOID;
569
570 PUSHMARK(SP);
571 XPUSHs (sub_init);
572 /*
573 * the next line is slightly wrong, as PL_op->op_next
574 * is actually being executed so we skip the first op.
575 * that doesn't matter, though, since it is only
576 * pp_nextstate and we never return...
577 * ah yes, and I don't care anyways ;)
578 */
579 PUTBACK;
580 PL_op = pp_entersub();
581 SPAGAIN;
582
583 ENTER; /* necessary e.g. for dounwind */
584 } 1012 {
585} 1013 cctx->ssize = coro_stacksize * (long)sizeof (long);
1014 New (0, cctx->sptr, coro_stacksize, long);
586 1015
587STATIC void 1016 if (!cctx->sptr)
588transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
589{
590 dSP;
591
592 if (prev != next)
593 {
594 /*
595 * this could be done in newprocess which would lead to
596 * extremely elegant and fast (basically just SAVE/LOAD)
597 * code here, but lazy allocation of stacks has also
598 * some virtues and the overhead of the if() is nil.
599 */
600 if (next->mainstack)
601 { 1017 {
602 SAVE (prev, flags); 1018 perror ("FATAL: unable to allocate stack for coroutine");
603 LOAD (next); 1019 _exit (EXIT_FAILURE);
1020 }
604 1021
605 /* mark this state as in-use */ 1022 stack_start = cctx->sptr;
606 next->mainstack = 0; 1023 stack_size = cctx->ssize;
607 next->tmps_ix = -2; 1024 }
608 1025
609 if (flags & TRANSFER_SAVE_CCTXT) 1026 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1027 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1028
1029 return cctx;
1030}
1031
1032static void
1033cctx_destroy (coro_cctx *cctx)
1034{
1035 if (!cctx)
1036 return;
1037
1038 --cctx_count;
1039
1040#if CORO_USE_VALGRIND
1041 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1042#endif
1043
1044#if HAVE_MMAP
1045 if (cctx->flags & CC_MAPPED)
1046 munmap (cctx->sptr, cctx->ssize);
1047 else
1048#endif
1049 Safefree (cctx->sptr);
1050
1051 Safefree (cctx);
1052}
1053
1054/* wether this cctx should be destructed */
1055#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1056
1057static coro_cctx *
1058cctx_get (pTHX)
1059{
1060 while (expect_true (cctx_first))
1061 {
1062 coro_cctx *cctx = cctx_first;
1063 cctx_first = cctx->next;
1064 --cctx_idle;
1065
1066 if (expect_true (!CCTX_EXPIRED (cctx)))
1067 return cctx;
1068
1069 cctx_destroy (cctx);
1070 }
1071
1072 return cctx_new ();
1073}
1074
1075static void
1076cctx_put (coro_cctx *cctx)
1077{
1078 /* free another cctx if overlimit */
1079 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1080 {
1081 coro_cctx *first = cctx_first;
1082 cctx_first = first->next;
1083 --cctx_idle;
1084
1085 cctx_destroy (first);
1086 }
1087
1088 ++cctx_idle;
1089 cctx->next = cctx_first;
1090 cctx_first = cctx;
1091}
1092
1093/** coroutine switching *****************************************************/
1094
1095static void
1096transfer_check (pTHX_ struct coro *prev, struct coro *next)
1097{
1098 if (expect_true (prev != next))
1099 {
1100 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1101 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1102
1103 if (expect_false (next->flags & CF_RUNNING))
1104 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1105
1106 if (expect_false (next->flags & CF_DESTROYED))
1107 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1108
1109 if (
1110#if PERL_VERSION_ATLEAST (5,9,0)
1111 expect_false (PL_parser)
1112#else
1113 expect_false (PL_lex_state != LEX_NOTPARSING)
1114#endif
1115 )
1116 croak ("Coro::State::transfer called while parsing, but this is not supported");
1117 }
1118}
1119
1120/* always use the TRANSFER macro */
1121static void NOINLINE
1122transfer (pTHX_ struct coro *prev, struct coro *next)
1123{
1124 dSTACKLEVEL;
1125 static volatile int has_throw;
1126
1127 /* sometimes transfer is only called to set idle_sp */
1128 if (expect_false (!next))
1129 {
1130 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1131 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1132 }
1133 else if (expect_true (prev != next))
1134 {
1135 coro_cctx *prev__cctx;
1136
1137 if (expect_false (prev->flags & CF_NEW))
1138 {
1139 /* create a new empty context */
1140 Newz (0, prev->cctx, 1, coro_cctx);
1141 prev->flags &= ~CF_NEW;
1142 prev->flags |= CF_RUNNING;
1143 }
1144
1145 prev->flags &= ~CF_RUNNING;
1146 next->flags |= CF_RUNNING;
1147
1148 LOCK;
1149
1150 /* first get rid of the old state */
1151 save_perl (aTHX_ prev);
1152
1153 if (expect_false (next->flags & CF_NEW))
1154 {
1155 /* need to start coroutine */
1156 next->flags &= ~CF_NEW;
1157 /* setup coroutine call */
1158 coro_setup (aTHX_ next);
1159 }
1160 else
1161 load_perl (aTHX_ next);
1162
1163 prev__cctx = prev->cctx;
1164
1165 /* possibly "free" the cctx */
1166 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1167 {
1168 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1169 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1170
1171 prev->cctx = 0;
1172
1173 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1174 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1175 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1176 if (!next->cctx)
1177 next->cctx = cctx_get (aTHX);
1178
1179 cctx_put (prev__cctx);
1180 }
1181
1182 ++next->usecount;
1183
1184 if (expect_true (!next->cctx))
1185 next->cctx = cctx_get (aTHX);
1186
1187 has_throw = !!next->throw;
1188
1189 if (expect_false (prev__cctx != next->cctx))
1190 {
1191 prev__cctx->top_env = PL_top_env;
1192 PL_top_env = next->cctx->top_env;
1193 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1194 }
1195
1196 free_coro_mortal (aTHX);
1197 UNLOCK;
1198
1199 if (expect_false (has_throw))
1200 {
1201 struct coro *coro = SvSTATE (coro_current);
1202
1203 if (coro->throw)
610 { 1204 {
611 if (!next->ssize) 1205 SV *exception = coro->throw;
612 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize); 1206 coro->throw = 0;
613 1207 sv_setsv (ERRSV, exception);
614 if (!prev->ssize) 1208 croak (0);
615 prev->ssize = 1; /* mark cctx as valid ;) */
616
617 coro_transfer (&(prev->cctx), &(next->cctx));
618 } 1209 }
619
620 } 1210 }
621 else if (next->tmps_ix == -2) 1211 }
1212}
1213
1214struct transfer_args
1215{
1216 struct coro *prev, *next;
1217};
1218
1219#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1220#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1221
1222/** high level stuff ********************************************************/
1223
1224static int
1225coro_state_destroy (pTHX_ struct coro *coro)
1226{
1227 if (coro->flags & CF_DESTROYED)
1228 return 0;
1229
1230 coro->flags |= CF_DESTROYED;
1231
1232 if (coro->flags & CF_READY)
1233 {
1234 /* reduce nready, as destroying a ready coro effectively unreadies it */
1235 /* alternative: look through all ready queues and remove the coro */
1236 LOCK;
1237 --coro_nready;
1238 UNLOCK;
1239 }
1240 else
1241 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1242
1243 if (coro->mainstack && coro->mainstack != main_mainstack)
1244 {
1245 struct coro temp;
1246
1247 if (coro->flags & CF_RUNNING)
622 croak ("tried to transfer to running coroutine"); 1248 croak ("FATAL: tried to destroy currently running coroutine");
1249
1250 save_perl (aTHX_ &temp);
1251 load_perl (aTHX_ coro);
1252
1253 coro_destroy (aTHX_ coro);
1254
1255 load_perl (aTHX_ &temp);
1256
1257 coro->slot = 0;
1258 }
1259
1260 cctx_destroy (coro->cctx);
1261 SvREFCNT_dec (coro->args);
1262
1263 if (coro->next) coro->next->prev = coro->prev;
1264 if (coro->prev) coro->prev->next = coro->next;
1265 if (coro == coro_first) coro_first = coro->next;
1266
1267 return 1;
1268}
1269
1270static int
1271coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1272{
1273 struct coro *coro = (struct coro *)mg->mg_ptr;
1274 mg->mg_ptr = 0;
1275
1276 coro->hv = 0;
1277
1278 if (--coro->refcnt < 0)
1279 {
1280 coro_state_destroy (aTHX_ coro);
1281 Safefree (coro);
1282 }
1283
1284 return 0;
1285}
1286
1287static int
1288coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1289{
1290 struct coro *coro = (struct coro *)mg->mg_ptr;
1291
1292 ++coro->refcnt;
1293
1294 return 0;
1295}
1296
1297static MGVTBL coro_state_vtbl = {
1298 0, 0, 0, 0,
1299 coro_state_free,
1300 0,
1301#ifdef MGf_DUP
1302 coro_state_dup,
1303#else
1304# define MGf_DUP 0
1305#endif
1306};
1307
1308static void
1309prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1310{
1311 ta->prev = SvSTATE (prev_sv);
1312 ta->next = SvSTATE (next_sv);
1313 TRANSFER_CHECK (*ta);
1314}
1315
1316static void
1317api_transfer (SV *prev_sv, SV *next_sv)
1318{
1319 dTHX;
1320 struct transfer_args ta;
1321
1322 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1323 TRANSFER (ta);
1324}
1325
1326/** Coro ********************************************************************/
1327
1328static void
1329coro_enq (pTHX_ SV *coro_sv)
1330{
1331 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1332}
1333
1334static SV *
1335coro_deq (pTHX)
1336{
1337 int prio;
1338
1339 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1340 if (AvFILLp (coro_ready [prio]) >= 0)
1341 return av_shift (coro_ready [prio]);
1342
1343 return 0;
1344}
1345
1346static int
1347api_ready (SV *coro_sv)
1348{
1349 dTHX;
1350 struct coro *coro;
1351
1352 if (SvROK (coro_sv))
1353 coro_sv = SvRV (coro_sv);
1354
1355 coro = SvSTATE (coro_sv);
1356
1357 if (coro->flags & CF_READY)
1358 return 0;
1359
1360 coro->flags |= CF_READY;
1361
1362 LOCK;
1363 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1364 ++coro_nready;
1365 UNLOCK;
1366
1367 return 1;
1368}
1369
1370static int
1371api_is_ready (SV *coro_sv)
1372{
1373 dTHX;
1374 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1375}
1376
1377static void
1378prepare_schedule (pTHX_ struct transfer_args *ta)
1379{
1380 SV *prev_sv, *next_sv;
1381
1382 for (;;)
1383 {
1384 LOCK;
1385 next_sv = coro_deq (aTHX);
1386
1387 /* nothing to schedule: call the idle handler */
1388 if (expect_false (!next_sv))
1389 {
1390 dSP;
1391 UNLOCK;
1392
1393 ENTER;
1394 SAVETMPS;
1395
1396 PUSHMARK (SP);
1397 PUTBACK;
1398 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1399 SPAGAIN;
1400
1401 FREETMPS;
1402 LEAVE;
1403 continue;
1404 }
1405
1406 ta->next = SvSTATE (next_sv);
1407
1408 /* cannot transfer to destroyed coros, skip and look for next */
1409 if (expect_false (ta->next->flags & CF_DESTROYED))
1410 {
1411 UNLOCK;
1412 SvREFCNT_dec (next_sv);
1413 /* coro_nready is already taken care of by destroy */
1414 continue;
1415 }
1416
1417 --coro_nready;
1418 UNLOCK;
1419 break;
1420 }
1421
1422 /* free this only after the transfer */
1423 prev_sv = SvRV (coro_current);
1424 ta->prev = SvSTATE (prev_sv);
1425 TRANSFER_CHECK (*ta);
1426 assert (ta->next->flags & CF_READY);
1427 ta->next->flags &= ~CF_READY;
1428 SvRV_set (coro_current, next_sv);
1429
1430 LOCK;
1431 free_coro_mortal (aTHX);
1432 coro_mortal = prev_sv;
1433 UNLOCK;
1434}
1435
1436static void
1437prepare_cede (pTHX_ struct transfer_args *ta)
1438{
1439 api_ready (coro_current);
1440 prepare_schedule (aTHX_ ta);
1441}
1442
1443static int
1444prepare_cede_notself (pTHX_ struct transfer_args *ta)
1445{
1446 if (coro_nready)
1447 {
1448 SV *prev = SvRV (coro_current);
1449 prepare_schedule (aTHX_ ta);
1450 api_ready (prev);
1451 return 1;
1452 }
1453 else
1454 return 0;
1455}
1456
1457static void
1458api_schedule (void)
1459{
1460 dTHX;
1461 struct transfer_args ta;
1462
1463 prepare_schedule (aTHX_ &ta);
1464 TRANSFER (ta);
1465}
1466
1467static int
1468api_cede (void)
1469{
1470 dTHX;
1471 struct transfer_args ta;
1472
1473 prepare_cede (aTHX_ &ta);
1474
1475 if (expect_true (ta.prev != ta.next))
1476 {
1477 TRANSFER (ta);
1478 return 1;
1479 }
1480 else
1481 return 0;
1482}
1483
1484static int
1485api_cede_notself (void)
1486{
1487 dTHX;
1488 struct transfer_args ta;
1489
1490 if (prepare_cede_notself (aTHX_ &ta))
1491 {
1492 TRANSFER (ta);
1493 return 1;
1494 }
1495 else
1496 return 0;
1497}
1498
1499static void
1500api_trace (SV *coro_sv, int flags)
1501{
1502 dTHX;
1503 struct coro *coro = SvSTATE (coro_sv);
1504
1505 if (flags & CC_TRACE)
1506 {
1507 if (!coro->cctx)
1508 coro->cctx = cctx_new ();
1509 else if (!(coro->cctx->flags & CC_TRACE))
1510 croak ("cannot enable tracing on coroutine with custom stack");
1511
1512 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1513 }
1514 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1515 {
1516 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1517
1518 if (coro->flags & CF_RUNNING)
1519 PL_runops = RUNOPS_DEFAULT;
623 else 1520 else
624 { 1521 coro->slot->runops = RUNOPS_DEFAULT;
625 SAVE (prev, -1); /* first get rid of the old state */
626
627 if (flags & TRANSFER_SAVE_CCTXT)
628 {
629 if (!next->ssize)
630 {
631 allocate_stack (next);
632 coro_create (&(next->cctx),
633 setup_coro, (void *)next,
634 next->sptr, next->ssize);
635 }
636
637 if (!prev->ssize)
638 prev->ssize = 1; /* mark cctx as valid ;) */
639
640 coro_transfer (&(prev->cctx), &(next->cctx));
641 }
642 else
643 setup_coro (next);
644 }
645 } 1522 }
646} 1523}
647 1524
648MODULE = Coro::State PACKAGE = Coro::State 1525MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
649 1526
650PROTOTYPES: ENABLE 1527PROTOTYPES: DISABLE
651 1528
652BOOT: 1529BOOT:
653{ /* {} necessary for stoopid perl-5.6.x */ 1530{
654 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1531#ifdef USE_ITHREADS
655 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1532 MUTEX_INIT (&coro_mutex);
1533#endif
1534 BOOT_PAGESIZE;
1535
1536 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1537 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1538#if 0
1539 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1540 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1541#endif
1542 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1543 rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1544 rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1545
656 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1546 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
657 1547
658 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1548 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
659 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1549 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
660 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1550 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
661 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1551 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
662
663 if (!padlist_cache)
664 padlist_cache = newHV ();
665 1552
666 main_mainstack = PL_mainstack; 1553 main_mainstack = PL_mainstack;
667} 1554 main_top_env = PL_top_env;
668 1555
669Coro::State 1556 while (main_top_env->je_prev)
670_newprocess(args) 1557 main_top_env = main_top_env->je_prev;
671 SV * args 1558
672 PROTOTYPE: $ 1559 coroapi.ver = CORO_API_VERSION;
1560 coroapi.rev = CORO_API_REVISION;
1561 coroapi.transfer = api_transfer;
1562
1563 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1564}
1565
1566SV *
1567new (char *klass, ...)
673 CODE: 1568 CODE:
674 Coro__State coro; 1569{
1570 struct coro *coro;
1571 MAGIC *mg;
1572 HV *hv;
1573 int i;
675 1574
676 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
677 croak ("Coro::State::_newprocess expects an arrayref");
678
679 New (0, coro, 1, struct coro); 1575 Newz (0, coro, 1, struct coro);
1576 coro->args = newAV ();
1577 coro->flags = CF_NEW;
680 1578
681 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1579 if (coro_first) coro_first->prev = coro;
682 coro->mainstack = 0; /* actual work is done inside transfer */ 1580 coro->next = coro_first;
683 coro->sptr = 0; 1581 coro_first = coro;
684 coro->ssize = 0;
685 1582
686 RETVAL = coro; 1583 coro->hv = hv = newHV ();
1584 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1585 mg->mg_flags |= MGf_DUP;
1586 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1587
1588 av_extend (coro->args, items - 1);
1589 for (i = 1; i < items; i++)
1590 av_push (coro->args, newSVsv (ST (i)));
1591}
687 OUTPUT: 1592 OUTPUT:
688 RETVAL 1593 RETVAL
689 1594
1595# these not obviously related functions are all rolled into the same xs
1596# function to increase chances that they all will call transfer with the same
1597# stack offset
690void 1598void
691transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1599_set_stacklevel (...)
692 Coro::State_or_hashref prev 1600 ALIAS:
693 Coro::State_or_hashref next 1601 Coro::State::transfer = 1
694 int flags 1602 Coro::schedule = 2
695 PROTOTYPE: @ 1603 Coro::cede = 3
1604 Coro::cede_notself = 4
696 CODE: 1605 CODE:
697 transfer (aTHX_ prev, next, flags); 1606{
1607 struct transfer_args ta;
1608
1609 PUTBACK;
1610 switch (ix)
1611 {
1612 case 0:
1613 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1614 ta.next = 0;
1615 break;
1616
1617 case 1:
1618 if (items != 2)
1619 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1620
1621 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1622 break;
1623
1624 case 2:
1625 prepare_schedule (aTHX_ &ta);
1626 break;
1627
1628 case 3:
1629 prepare_cede (aTHX_ &ta);
1630 break;
1631
1632 case 4:
1633 if (!prepare_cede_notself (aTHX_ &ta))
1634 XSRETURN_EMPTY;
1635
1636 break;
1637 }
1638 SPAGAIN;
1639
1640 BARRIER;
1641 PUTBACK;
1642 TRANSFER (ta);
1643 SPAGAIN; /* might be the sp of a different coroutine now */
1644 /* be extra careful not to ever do anything after TRANSFER */
1645}
1646
1647bool
1648_destroy (SV *coro_sv)
1649 CODE:
1650 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1651 OUTPUT:
1652 RETVAL
698 1653
699void 1654void
700DESTROY(coro) 1655_exit (code)
701 Coro::State coro 1656 int code
702 CODE: 1657 PROTOTYPE: $
1658 CODE:
1659 _exit (code);
703 1660
704 if (coro->mainstack && coro->mainstack != main_mainstack) 1661int
1662cctx_stacksize (int new_stacksize = 0)
1663 CODE:
1664 RETVAL = coro_stacksize;
1665 if (new_stacksize)
1666 coro_stacksize = new_stacksize;
1667 OUTPUT:
1668 RETVAL
1669
1670int
1671cctx_count ()
1672 CODE:
1673 RETVAL = cctx_count;
1674 OUTPUT:
1675 RETVAL
1676
1677int
1678cctx_idle ()
1679 CODE:
1680 RETVAL = cctx_idle;
1681 OUTPUT:
1682 RETVAL
1683
1684void
1685list ()
1686 PPCODE:
1687{
1688 struct coro *coro;
1689 for (coro = coro_first; coro; coro = coro->next)
1690 if (coro->hv)
1691 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1692}
1693
1694void
1695call (Coro::State coro, SV *coderef)
1696 ALIAS:
1697 eval = 1
1698 CODE:
1699{
1700 if (coro->mainstack)
705 { 1701 {
706 struct coro temp; 1702 struct coro temp;
707 1703
708 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1704 if (!(coro->flags & CF_RUNNING))
709 LOAD(aTHX_ coro); 1705 {
1706 PUTBACK;
1707 save_perl (aTHX_ &temp);
1708 load_perl (aTHX_ coro);
1709 }
710 1710
711 destroy_stacks (aTHX); 1711 {
1712 dSP;
1713 ENTER;
1714 SAVETMPS;
1715 PUTBACK;
1716 PUSHSTACK;
1717 PUSHMARK (SP);
712 1718
713 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1719 if (ix)
1720 eval_sv (coderef, 0);
1721 else
1722 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
714 1723
715 coro->mainstack = 0; 1724 POPSTACK;
1725 SPAGAIN;
1726 FREETMPS;
1727 LEAVE;
1728 PUTBACK;
1729 }
1730
1731 if (!(coro->flags & CF_RUNNING))
1732 {
1733 save_perl (aTHX_ coro);
1734 load_perl (aTHX_ &temp);
1735 SPAGAIN;
1736 }
716 } 1737 }
1738}
717 1739
718 if (coro->sptr) 1740SV *
1741is_ready (Coro::State coro)
1742 PROTOTYPE: $
1743 ALIAS:
1744 is_ready = CF_READY
1745 is_running = CF_RUNNING
1746 is_new = CF_NEW
1747 is_destroyed = CF_DESTROYED
1748 CODE:
1749 RETVAL = boolSV (coro->flags & ix);
1750 OUTPUT:
1751 RETVAL
1752
1753void
1754api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1755
1756SV *
1757has_stack (Coro::State coro)
1758 PROTOTYPE: $
1759 CODE:
1760 RETVAL = boolSV (!!coro->cctx);
1761 OUTPUT:
1762 RETVAL
1763
1764int
1765is_traced (Coro::State coro)
1766 PROTOTYPE: $
1767 CODE:
1768 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1769 OUTPUT:
1770 RETVAL
1771
1772IV
1773rss (Coro::State coro)
1774 PROTOTYPE: $
1775 ALIAS:
1776 usecount = 1
1777 CODE:
1778 switch (ix)
1779 {
1780 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1781 case 1: RETVAL = coro->usecount; break;
1782 }
1783 OUTPUT:
1784 RETVAL
1785
1786
1787MODULE = Coro::State PACKAGE = Coro
1788
1789BOOT:
1790{
1791 int i;
1792
1793 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1794 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1795 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1796
1797 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1798 SvREADONLY_on (coro_current);
1799
1800 coro_stash = gv_stashpv ("Coro", TRUE);
1801
1802 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1803 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1804 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1805 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1806 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1807 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1808
1809 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1810 coro_ready[i] = newAV ();
1811
1812 {
1813 SV *sv = perl_get_sv ("Coro::API", TRUE);
1814 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1815
1816 coroapi.schedule = api_schedule;
1817 coroapi.cede = api_cede;
1818 coroapi.cede_notself = api_cede_notself;
1819 coroapi.ready = api_ready;
1820 coroapi.is_ready = api_is_ready;
1821 coroapi.nready = &coro_nready;
1822 coroapi.current = coro_current;
1823
1824 GCoroAPI = &coroapi;
1825 sv_setiv (sv, (IV)&coroapi);
1826 SvREADONLY_on (sv);
1827 }
1828}
1829
1830void
1831_set_current (SV *current)
1832 PROTOTYPE: $
1833 CODE:
1834 SvREFCNT_dec (SvRV (coro_current));
1835 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1836
1837int
1838prio (Coro::State coro, int newprio = 0)
1839 ALIAS:
1840 nice = 1
1841 CODE:
1842{
1843 RETVAL = coro->prio;
1844
1845 if (items > 1)
719 { 1846 {
720 deallocate_stack (coro); 1847 if (ix)
1848 newprio = coro->prio - newprio;
1849
1850 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1851 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1852
721 coro->sptr = 0; 1853 coro->prio = newprio;
722 } 1854 }
1855}
1856 OUTPUT:
1857 RETVAL
723 1858
724 Safefree (coro); 1859SV *
1860ready (SV *self)
1861 PROTOTYPE: $
1862 CODE:
1863 RETVAL = boolSV (api_ready (self));
1864 OUTPUT:
1865 RETVAL
1866
1867int
1868nready (...)
1869 PROTOTYPE:
1870 CODE:
1871 RETVAL = coro_nready;
1872 OUTPUT:
1873 RETVAL
725 1874
726void 1875void
727flush() 1876throw (Coro::State self, SV *throw = &PL_sv_undef)
1877 PROTOTYPE: $;$
1878 CODE:
1879 SvREFCNT_dec (self->throw);
1880 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1881
1882# for async_pool speedup
1883void
1884_pool_1 (SV *cb)
728 CODE: 1885 CODE:
729#ifdef MAY_FLUSH 1886{
730 flush_padlist_cache (); 1887 struct coro *coro = SvSTATE (coro_current);
731#endif 1888 HV *hv = (HV *)SvRV (coro_current);
1889 AV *defav = GvAV (PL_defgv);
1890 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1891 AV *invoke_av;
1892 int i, len;
732 1893
733MODULE = Coro::State PACKAGE = Coro::Cont 1894 if (!invoke)
1895 croak ("\3async_pool terminate\2\n");
734 1896
735# this is slightly dirty 1897 SvREFCNT_dec (coro->saved_deffh);
1898 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1899
1900 hv_store (hv, "desc", sizeof ("desc") - 1,
1901 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1902
1903 invoke_av = (AV *)SvRV (invoke);
1904 len = av_len (invoke_av);
1905
1906 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1907
1908 if (len > 0)
1909 {
1910 av_fill (defav, len - 1);
1911 for (i = 0; i < len; ++i)
1912 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1913 }
1914
1915 SvREFCNT_dec (invoke);
1916}
736 1917
737void 1918void
738yield(...) 1919_pool_2 (SV *cb)
1920 CODE:
1921{
1922 struct coro *coro = SvSTATE (coro_current);
1923
1924 sv_setsv (cb, &PL_sv_undef);
1925
1926 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1927 coro->saved_deffh = 0;
1928
1929 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1930 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1931 croak ("\3async_pool terminate\2\n");
1932
1933 av_clear (GvAV (PL_defgv));
1934 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1935 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1936
1937 coro->prio = 0;
1938
1939 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1940 api_trace (coro_current, 0);
1941
1942 av_push (av_async_pool, newSVsv (coro_current));
1943}
1944
1945
1946MODULE = Coro::State PACKAGE = Coro::AIO
1947
1948SV *
1949_get_state ()
1950 CODE:
1951{
1952 struct io_state *data;
1953
1954 RETVAL = newSV (sizeof (struct io_state));
1955 data = (struct io_state *)SvPVX (RETVAL);
1956 SvCUR_set (RETVAL, sizeof (struct io_state));
1957 SvPOK_only (RETVAL);
1958
1959 data->errorno = errno;
1960 data->laststype = PL_laststype;
1961 data->laststatval = PL_laststatval;
1962 data->statcache = PL_statcache;
1963}
1964 OUTPUT:
1965 RETVAL
1966
1967void
1968_set_state (char *data_)
739 PROTOTYPE: @ 1969 PROTOTYPE: $
740 CODE: 1970 CODE:
741 static SV *returnstk; 1971{
742 SV *sv; 1972 struct io_state *data = (void *)data_;
743 AV *defav = GvAV (PL_defgv);
744 struct coro *prev, *next;
745 1973
746 if (!returnstk) 1974 errno = data->errorno;
747 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1975 PL_laststype = data->laststype;
1976 PL_laststatval = data->laststatval;
1977 PL_statcache = data->statcache;
1978}
748 1979
749 /* set up @_ -- ugly */
750 av_clear (defav);
751 av_fill (defav, items - 1);
752 while (items--)
753 av_store (defav, items, SvREFCNT_inc (ST(items)));
754
755 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
756 sv = av_pop ((AV *)SvRV (returnstk));
757 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
758 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
759 SvREFCNT_dec (sv);
760
761 transfer(aTHX_ prev, next, 0);
762

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