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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 1.214 by root, Sat Oct 13 23:19:10 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 SUB_INIT "Coro::State::initialize" 47/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8
15 49
16#define TRANSFER_SAVE_DEFAV 0x00000001 50#define PERL_VERSION_ATLEAST(a,b,c) \
17#define TRANSFER_SAVE_DEFSV 0x00000002 51 (PERL_REVISION > (a) \
18#define TRANSFER_SAVE_ERRSV 0x00000004 52 || (PERL_REVISION == (a) \
19#define TRANSFER_SAVE_CCTXT 0x00000008 53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
20 55
21#define TRANSFER_SAVE_ALL -1 56#if !PERL_VERSION_ATLEAST (5,6,0)
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
22 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 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 */
23struct coro { 216struct coro {
24 /* the optional C context */ 217 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 218 coro_cctx *cctx;
26 void *sptr;
27 long ssize;
28 219
29 /* optionally saved, might be zero */ 220 /* process data */
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; 221 AV *mainstack;
41 SV **stack_sp; 222 perl_slots *slot; /* basically the saved 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;
65 223
66 /* data associated with this coroutine (initial args) */ 224 AV *args; /* data associated with this coroutine (initial args) */
67 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;
68}; 241};
69 242
70typedef struct coro *Coro__State; 243typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 244typedef struct coro *Coro__State_or_hashref;
72 245
73static AV *main_mainstack; /* used to differentiate between $main and others */ 246/** Coro ********************************************************************/
74static HV *coro_state_stash;
75static HV *padlist_cache;
76 247
77/* mostly copied from op.c:cv_clone2 */ 248#define PRIO_MAX 3
78STATIC AV * 249#define PRIO_HIGH 1
79clone_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)
80{ 265{
81 AV *av; 266#if PERL_VERSION_ATLEAST (5,9,0)
82 I32 ix; 267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 268 get_sv (name, create);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 269#endif
85 SV **pname = AvARRAY (protopad_name); 270 return get_sv (name, create);
86 SV **ppad = AvARRAY (protopad); 271}
87 I32 fname = AvFILLp (protopad_name); 272
88 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);
89 AV *newpadlist, *newpad_name, *newpad; 297 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);
99 298
100 newpadlist = newAV (); 299 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 300 AvREAL_off (newpadlist);
102 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)));
103 av_store (newpadlist, 1, (SV *) newpad); 310 av_store (newpadlist, 1, (SV *)newpad);
104 311
105 av = newAV (); /* will be @_ */ 312 return newpadlist;
106 av_extend (av, 0); 313}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 314
110 for (ix = fpad; ix > 0; ix--) 315static void
316free_padlist (pTHX_ AV *padlist)
317{
318 /* may be during global destruction */
319 if (SvREFCNT (padlist))
111 { 320 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 321 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 322 while (i >= 0)
114 { 323 {
115 char *name = SvPVX (namesv); /* XXX */ 324 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 325 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 326 {
120 else
121 { /* our own lexical */
122 SV *sv; 327 SV *sv;
123 if (*name == '&') 328 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 329 SvREFCNT_dec (sv);
125 else if (*name == '@') 330
126 sv = (SV *) newAV (); 331 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 } 332 }
135 } 333 }
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 }
147 334
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); 335 SvREFCNT_dec ((SV*)padlist);
188 } 336 }
189} 337}
190#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))
191 395
192/* the next two functions merely cache the padlists */ 396/* the next two functions merely cache the padlists */
193STATIC void 397static void
194get_padlist (CV *cv) 398get_padlist (pTHX_ CV *cv)
195{ 399{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 400 MAGIC *mg = CORO_MAGIC_cv (cv);
401 AV *av;
197 402
198 if (he && AvFILLp ((AV *)*he) >= 0) 403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 405 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 { 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;
211 SvREFCNT_dec (*he); 412 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 413#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
415#endif
213 } 416 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 417}
217 418
218#ifdef MAY_FLUSH
219STATIC void
220flush_padlist_cache ()
221{
222 HV *hv = padlist_cache;
223 padlist_cache = newHV ();
224
225 if (hv_iterinit (hv))
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 }
239
240 SvREFCNT_dec (hv);
241}
242#endif
243
244#define SB do {
245#define SE } while (0)
246
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
249
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
251
252static 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
253load_state(pTHX_ Coro__State c) 439load_perl (pTHX_ Coro__State c)
254{ 440{
255 PL_dowarn = c->dowarn; 441 perl_slots *slot = c->slot;
442 c->slot = 0;
256 443
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 444 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp;
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;
284 445
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 446 GvSV (PL_defgv) = slot->defsv;
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 447 GvAV (PL_defgv) = slot->defav;
287 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
288 454
289 { 455 {
290 dSP; 456 dSP;
457
291 CV *cv; 458 CV *cv;
292 459
293 /* now do the ugly restore mess */ 460 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 461 while (expect_true (cv = (CV *)POPs))
295 { 462 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 463 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 464 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 465 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 466 }
309 467
310 PUTBACK; 468 PUTBACK;
311 } 469 }
312} 470}
313 471
314static void 472static void
315save_state(pTHX_ Coro__State c, int flags) 473save_perl (pTHX_ Coro__State c)
316{ 474{
317 { 475 {
318 dSP; 476 dSP;
319 I32 cxix = cxstack_ix; 477 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 478 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 481 /*
324 * 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
325 * (and reinitialize) all cv's in the whole callchain :( 483 * (and reinitialize) all cv's in the whole callchain :(
326 */ 484 */
327 485
328 PUSHs (Nullsv); 486 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 487 /* this loop was inspired by pp_caller */
330 for (;;) 488 for (;;)
331 { 489 {
332 do 490 while (expect_true (cxix >= 0))
333 { 491 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 492 PERL_CONTEXT *cx = &ccstk[cxix--];
335 493
336 if (CxTYPE(cx) == CXt_SUB) 494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 495 {
338 CV *cv = cx->blk_sub.cv; 496 CV *cv = cx->blk_sub.cv;
497
339 if (CvDEPTH(cv)) 498 if (expect_true (CvDEPTH (cv)))
340 { 499 {
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); 500 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)); 501 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 503 PUSHs ((SV *)cv);
357 504
358 get_padlist (cv); /* this is a monster */ 505 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv);
359 } 507 }
360 } 508 }
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 } 509 }
368 while (cxix >= 0);
369 510
370 if (top_si->si_type == PERLSI_MAIN) 511 if (expect_true (top_si->si_type == PERLSI_MAIN))
371 break; 512 break;
372 513
373 top_si = top_si->si_prev; 514 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 515 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 516 cxix = top_si->si_cxix;
376 } 517 }
377 518
378 PUTBACK; 519 PUTBACK;
379 } 520 }
380 521
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 522 /* allocate some space on the context stack for our purposes */
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 523 /* we manually unroll here, as usually 2 slots is enough */
383 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 */
384 533
385 /* I have not the slightest idea of why av_reify is necessary */
386 /* but if it's missing the defav contents magically get replaced sometimes */
387 if (c->defav)
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; 534 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp; 535
396 c->op = PL_op; 536 {
397 c->curpad = PL_curpad; 537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
398 c->stack_base = PL_stack_base; 538
399 c->stack_max = PL_stack_max; 539 slot->defav = GvAV (PL_defgv);
400 c->tmps_stack = PL_tmps_stack; 540 slot->defsv = DEFSV;
401 c->tmps_floor = PL_tmps_floor; 541 slot->errsv = ERRSV;
402 c->tmps_ix = PL_tmps_ix; 542 slot->irsgv = GvSV (irsgv);
403 c->tmps_max = PL_tmps_max; 543
404 c->markstack = PL_markstack; 544 #define VAR(name,type) slot->name = PL_ ## name;
405 c->markstack_ptr = PL_markstack_ptr; 545 # include "state.h"
406 c->markstack_max = PL_markstack_max; 546 #undef VAR
407 c->scopestack = PL_scopestack; 547 }
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} 548}
420 549
421/* 550/*
422 * allocate various perl stacks. This is an exact copy 551 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 552 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 553 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 554 * not usually need a lot of stackspace.
426 */ 555 */
427STATIC void 556#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks
558#else
559static void
428coro_init_stacks (pTHX) 560coro_init_stacks (pTHX)
429{ 561{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 562 PL_curstackinfo = new_stackinfo(32, 8);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 563 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 564 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 566
435 PL_stack_base = AvARRAY(PL_curstack); 567 PL_stack_base = AvARRAY(PL_curstack);
436 PL_stack_sp = PL_stack_base; 568 PL_stack_sp = PL_stack_base;
437 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 569 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438 570
439 New(50,PL_tmps_stack,64,SV*); 571 New(50,PL_tmps_stack,32,SV*);
440 PL_tmps_floor = -1; 572 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 573 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 574 PL_tmps_max = 32;
443 575
444 New(54,PL_markstack,12,I32); 576 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 577 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 578 PL_markstack_max = PL_markstack + 16;
447 579
580#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 581 SET_MARK_OFFSET;
582#endif
449 583
450 New(54,PL_scopestack,12,I32); 584 New(54,PL_scopestack,8,I32);
451 PL_scopestack_ix = 0; 585 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 586 PL_scopestack_max = 8;
453 587
454 New(54,PL_savestack,64,ANY); 588 New(54,PL_savestack,24,ANY);
455 PL_savestack_ix = 0; 589 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 590 PL_savestack_max = 24;
457 591
592#if !PERL_VERSION_ATLEAST (5,9,0)
458 New(54,PL_retstack,8,OP*); 593 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 594 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 595 PL_retstack_max = 4;
596#endif
461} 597}
598#endif
462 599
463/* 600/*
464 * destroy the stacks, the callchain etc... 601 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 602 */
467STATIC void 603static void
468destroy_stacks(pTHX) 604coro_destroy_stacks (pTHX)
469{ 605{
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) 606 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 607 PL_curstackinfo = PL_curstackinfo->si_next;
480 608
481 while (PL_curstackinfo) 609 while (PL_curstackinfo)
482 { 610 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 611 PERL_SI *p = PL_curstackinfo->si_prev;
484 612
485 { 613 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); 614 SvREFCNT_dec (PL_curstackinfo->si_stack);
615
494 Safefree(PL_curstackinfo->si_cxstack); 616 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 617 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 618 PL_curstackinfo = p;
497 } 619 }
498 620
499 Safefree(PL_tmps_stack); 621 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 622 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 623 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 624 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0)
503 Safefree(PL_retstack); 626 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 627#endif
514 { 628}
515 /*FIXME*//*D*//* reasonable stack size! */ 629
516 ctx->ssize = 4096 * sizeof (long); 630static size_t
517 New (0, ctx->sptr, 4096, long); 631coro_rss (pTHX_ struct coro *coro)
632{
633 size_t rss = sizeof (*coro);
634
635 if (coro->mainstack)
518 } 636 {
519} 637 perl_slots tmp_slot;
638 perl_slots *slot;
520 639
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
669static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
670
671/*
672 * This overrides the default magic get method of %SIG elements.
673 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
674 * and instead of tryign to save and restore the hash elements, we just provide
675 * readback here.
676 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
677 * not expecting this to actually change the hook. This is a potential problem
678 * when a schedule happens then, but we ignore this.
679 */
521static void 680static int
522deallocate_stack (Coro__State ctx) 681coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
523{ 682{
524#ifdef HAVE_MMAP 683 const char *s = MgPV_nolen_const (mg);
525 munmap (ctx->sptr, ctx->ssize);
526#else
527 Safefree (ctx->sptr);
528#endif
529}
530 684
531/* might go away together with optional SAVE_CCTXT */ 685 if (*s == '_')
686 {
687 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
688 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
689 }
690
691 return orig_sigelem_get (aTHX_ sv, mg);
692}
693
532static void 694static void
533setup_coro (void *arg) 695coro_setup (pTHX_ struct coro *coro)
534{ 696{
535 /* 697 /*
536 * emulate part of the perl startup here. 698 * emulate part of the perl startup here.
537 */ 699 */
700 coro_init_stacks (aTHX);
701
702 PL_runops = RUNOPS_DEFAULT;
703 PL_curcop = &PL_compiling;
704 PL_in_eval = EVAL_NULL;
705 PL_comppad = 0;
706 PL_curpm = 0;
707 PL_curpad = 0;
708 PL_localizing = 0;
709 PL_dirty = 0;
710 PL_restartop = 0;
711
712 /* recreate the die/warn hooks */
713 PL_diehook = 0;
714 hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
715 PL_diehook = SvREFCNT_inc (rv_diehook);
716
717 PL_warnhook = 0;
718 hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
719 PL_warnhook = SvREFCNT_inc (rv_warnhook);
720
721 GvSV (PL_defgv) = newSV (0);
722 GvAV (PL_defgv) = coro->args; coro->args = 0;
723 GvSV (PL_errgv) = newSV (0);
724 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
725 PL_rs = newSVsv (GvSV (irsgv));
726 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
727
728 {
729 dSP;
730 LOGOP myop;
731
732 Zero (&myop, 1, LOGOP);
733 myop.op_next = Nullop;
734 myop.op_flags = OPf_WANT_VOID;
735
736 PUSHMARK (SP);
737 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
738 PUTBACK;
739 PL_op = (OP *)&myop;
740 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
741 SPAGAIN;
742 }
743
744 /* this newly created coroutine might be run on an existing cctx which most
745 * likely was suspended in set_stacklevel, called from entersub.
746 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
747 * so we ENTER here for symmetry
748 */
749 ENTER;
750}
751
752static void
753coro_destroy (pTHX_ struct coro *coro)
754{
755 if (!IN_DESTRUCT)
756 {
757 /* restore all saved variables and stuff */
758 LEAVE_SCOPE (0);
759 assert (PL_tmps_floor == -1);
760
761 /* free all temporaries */
762 FREETMPS;
763 assert (PL_tmps_ix == -1);
764
765 /* unwind all extra stacks */
766 POPSTACK_TO (PL_mainstack);
767
768 /* unwind main stack */
769 dounwind (-1);
770 }
771
772 SvREFCNT_dec (GvSV (PL_defgv));
773 SvREFCNT_dec (GvAV (PL_defgv));
774 SvREFCNT_dec (GvSV (PL_errgv));
775 SvREFCNT_dec (PL_defoutgv);
776 SvREFCNT_dec (PL_rs);
777 SvREFCNT_dec (GvSV (irsgv));
778
779 SvREFCNT_dec (PL_diehook);
780 SvREFCNT_dec (PL_warnhook);
781
782 SvREFCNT_dec (coro->saved_deffh);
783 SvREFCNT_dec (coro->throw);
784
785 coro_destroy_stacks (aTHX);
786}
787
788static void
789free_coro_mortal (pTHX)
790{
791 if (expect_true (coro_mortal))
792 {
793 SvREFCNT_dec (coro_mortal);
794 coro_mortal = 0;
795 }
796}
797
798static int
799runops_trace (pTHX)
800{
801 COP *oldcop = 0;
802 int oldcxix = -2;
803 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
804 coro_cctx *cctx = coro->cctx;
805
806 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
807 {
808 PERL_ASYNC_CHECK ();
809
810 if (cctx->flags & CC_TRACE_ALL)
811 {
812 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
813 {
814 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
815 SV **bot, **top;
816 AV *av = newAV (); /* return values */
817 SV **cb;
818 dSP;
819
820 GV *gv = CvGV (cx->blk_sub.cv);
821 SV *fullname = sv_2mortal (newSV (0));
822 if (isGV (gv))
823 gv_efullname3 (fullname, gv, 0);
824
825 bot = PL_stack_base + cx->blk_oldsp + 1;
826 top = cx->blk_gimme == G_ARRAY ? SP + 1
827 : cx->blk_gimme == G_SCALAR ? bot + 1
828 : bot;
829
830 av_extend (av, top - bot);
831 while (bot < top)
832 av_push (av, SvREFCNT_inc (*bot++));
833
834 PL_runops = RUNOPS_DEFAULT;
835 ENTER;
836 SAVETMPS;
837 EXTEND (SP, 3);
838 PUSHMARK (SP);
839 PUSHs (&PL_sv_no);
840 PUSHs (fullname);
841 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
842 PUTBACK;
843 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
844 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
845 SPAGAIN;
846 FREETMPS;
847 LEAVE;
848 PL_runops = runops_trace;
849 }
850
851 if (oldcop != PL_curcop)
852 {
853 oldcop = PL_curcop;
854
855 if (PL_curcop != &PL_compiling)
856 {
857 SV **cb;
858
859 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
860 {
861 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
862
863 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
864 {
865 runops_proc_t old_runops = PL_runops;
866 dSP;
867 GV *gv = CvGV (cx->blk_sub.cv);
868 SV *fullname = sv_2mortal (newSV (0));
869
870 if (isGV (gv))
871 gv_efullname3 (fullname, gv, 0);
872
873 PL_runops = RUNOPS_DEFAULT;
874 ENTER;
875 SAVETMPS;
876 EXTEND (SP, 3);
877 PUSHMARK (SP);
878 PUSHs (&PL_sv_yes);
879 PUSHs (fullname);
880 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
881 PUTBACK;
882 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
883 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
884 SPAGAIN;
885 FREETMPS;
886 LEAVE;
887 PL_runops = runops_trace;
888 }
889
890 oldcxix = cxstack_ix;
891 }
892
893 if (cctx->flags & CC_TRACE_LINE)
894 {
895 dSP;
896
897 PL_runops = RUNOPS_DEFAULT;
898 ENTER;
899 SAVETMPS;
900 EXTEND (SP, 3);
901 PL_runops = RUNOPS_DEFAULT;
902 PUSHMARK (SP);
903 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
904 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
905 PUTBACK;
906 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
907 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
908 SPAGAIN;
909 FREETMPS;
910 LEAVE;
911 PL_runops = runops_trace;
912 }
913 }
914 }
915 }
916 }
917
918 TAINT_NOT;
919 return 0;
920}
921
922/* inject a fake call to Coro::State::_cctx_init into the execution */
923/* _cctx_init should be careful, as it could be called at almost any time */
924/* during execution of a perl program */
925static void NOINLINE
926cctx_prepare (pTHX_ coro_cctx *cctx)
927{
538 dSP; 928 dSP;
539 Coro__State ctx = (Coro__State)arg; 929 LOGOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 930
542 coro_init_stacks (aTHX); 931 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 932
933 if (cctx->flags & CC_TRACE)
934 PL_runops = runops_trace;
935
936 Zero (&myop, 1, LOGOP);
937 myop.op_next = PL_op;
938 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
939
940 PUSHMARK (SP);
941 EXTEND (SP, 2);
942 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
943 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
944 PUTBACK;
945 PL_op = (OP *)&myop;
946 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 947 SPAGAIN;
948}
545 949
546 /*PL_curcop = 0;*/ 950/*
547 SvREFCNT_dec (GvAV (PL_defgv)); 951 * this is a _very_ stripped down perl interpreter ;)
548 GvAV (PL_defgv) = ctx->args; 952 */
953static void
954cctx_run (void *arg)
955{
956 dTHX;
549 957
550 if (ctx->sptr) 958 /* cctx_run is the alternative tail of transfer(), so unlock here. */
959 UNLOCK;
960
961 /* we now skip the entersub that lead to transfer() */
962 PL_op = PL_op->op_next;
963
964 /* inject a fake subroutine call to cctx_init */
965 cctx_prepare (aTHX_ (coro_cctx *)arg);
966
967 /* somebody or something will hit me for both perl_run and PL_restartop */
968 PL_restartop = PL_op;
969 perl_run (PL_curinterp);
970
971 /*
972 * If perl-run returns we assume exit() was being called or the coro
973 * fell off the end, which seems to be the only valid (non-bug)
974 * reason for perl_run to return. We try to exit by jumping to the
975 * bootstrap-time "top" top_env, as we cannot restore the "main"
976 * coroutine as Coro has no such concept
977 */
978 PL_top_env = main_top_env;
979 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
980}
981
982static coro_cctx *
983cctx_new ()
984{
985 coro_cctx *cctx;
986 void *stack_start;
987 size_t stack_size;
988
989 ++cctx_count;
990
991 Newz (0, cctx, 1, coro_cctx);
992
993#if HAVE_MMAP
994 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
995 /* mmap supposedly does allocate-on-write for us */
996 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
997
998 if (cctx->sptr != (void *)-1)
551 { 999 {
552 PUSHMARK(SP); 1000# if CORO_STACKGUARD
553 PUTBACK; 1001 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1002# endif
555 croak ("FATAL: CCTXT coroutine returned!"); 1003 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1004 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1005 cctx->flags |= CC_MAPPED;
556 } 1006 }
557 else 1007 else
558 { 1008#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 } 1009 {
582} 1010 cctx->ssize = coro_stacksize * (long)sizeof (long);
1011 New (0, cctx->sptr, coro_stacksize, long);
583 1012
584STATIC void 1013 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 { 1014 {
599 SAVE (prev, flags); 1015 perror ("FATAL: unable to allocate stack for coroutine");
600 LOAD (next); 1016 _exit (EXIT_FAILURE);
1017 }
601 1018
602 /* mark this state as in-use */ 1019 stack_start = cctx->sptr;
603 next->mainstack = 0; 1020 stack_size = cctx->ssize;
604 next->tmps_ix = -2; 1021 }
605 1022
606 if (flags & TRANSFER_SAVE_CCTXT) 1023 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1024 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1025
1026 return cctx;
1027}
1028
1029static void
1030cctx_destroy (coro_cctx *cctx)
1031{
1032 if (!cctx)
1033 return;
1034
1035 --cctx_count;
1036
1037#if CORO_USE_VALGRIND
1038 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1039#endif
1040
1041#if HAVE_MMAP
1042 if (cctx->flags & CC_MAPPED)
1043 munmap (cctx->sptr, cctx->ssize);
1044 else
1045#endif
1046 Safefree (cctx->sptr);
1047
1048 Safefree (cctx);
1049}
1050
1051/* wether this cctx should be destructed */
1052#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1053
1054static coro_cctx *
1055cctx_get (pTHX)
1056{
1057 while (expect_true (cctx_first))
1058 {
1059 coro_cctx *cctx = cctx_first;
1060 cctx_first = cctx->next;
1061 --cctx_idle;
1062
1063 if (expect_true (!CCTX_EXPIRED (cctx)))
1064 return cctx;
1065
1066 cctx_destroy (cctx);
1067 }
1068
1069 return cctx_new ();
1070}
1071
1072static void
1073cctx_put (coro_cctx *cctx)
1074{
1075 /* free another cctx if overlimit */
1076 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1077 {
1078 coro_cctx *first = cctx_first;
1079 cctx_first = first->next;
1080 --cctx_idle;
1081
1082 cctx_destroy (first);
1083 }
1084
1085 ++cctx_idle;
1086 cctx->next = cctx_first;
1087 cctx_first = cctx;
1088}
1089
1090/** coroutine switching *****************************************************/
1091
1092static void
1093transfer_check (pTHX_ struct coro *prev, struct coro *next)
1094{
1095 if (expect_true (prev != next))
1096 {
1097 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1098 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1099
1100 if (expect_false (next->flags & CF_RUNNING))
1101 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1102
1103 if (expect_false (next->flags & CF_DESTROYED))
1104 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1105
1106 if (
1107#if PERL_VERSION_ATLEAST (5,9,0)
1108 expect_false (PL_parser)
1109#else
1110 expect_false (PL_lex_state != LEX_NOTPARSING)
1111#endif
1112 )
1113 croak ("Coro::State::transfer called while parsing, but this is not supported");
1114 }
1115}
1116
1117/* always use the TRANSFER macro */
1118static void NOINLINE
1119transfer (pTHX_ struct coro *prev, struct coro *next)
1120{
1121 dSTACKLEVEL;
1122
1123 /* sometimes transfer is only called to set idle_sp */
1124 if (expect_false (!next))
1125 {
1126 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1127 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1128 }
1129 else if (expect_true (prev != next))
1130 {
1131 coro_cctx *prev__cctx;
1132
1133 if (expect_false (prev->flags & CF_NEW))
1134 {
1135 /* create a new empty context */
1136 Newz (0, prev->cctx, 1, coro_cctx);
1137 prev->flags &= ~CF_NEW;
1138 prev->flags |= CF_RUNNING;
1139 }
1140
1141 prev->flags &= ~CF_RUNNING;
1142 next->flags |= CF_RUNNING;
1143
1144 LOCK;
1145
1146 /* first get rid of the old state */
1147 save_perl (aTHX_ prev);
1148
1149 if (expect_false (next->flags & CF_NEW))
1150 {
1151 /* need to start coroutine */
1152 next->flags &= ~CF_NEW;
1153 /* setup coroutine call */
1154 coro_setup (aTHX_ next);
1155 }
1156 else
1157 load_perl (aTHX_ next);
1158
1159 prev__cctx = prev->cctx;
1160
1161 /* possibly "free" the cctx */
1162 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1163 {
1164 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1165 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1166
1167 prev->cctx = 0;
1168
1169 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1170 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1171 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1172 if (!next->cctx)
1173 next->cctx = cctx_get (aTHX);
1174
1175 cctx_put (prev__cctx);
1176 }
1177
1178 ++next->usecount;
1179
1180 if (expect_true (!next->cctx))
1181 next->cctx = cctx_get (aTHX);
1182
1183 if (expect_false (prev__cctx != next->cctx))
1184 {
1185 prev__cctx->top_env = PL_top_env;
1186 PL_top_env = next->cctx->top_env;
1187 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1188 }
1189
1190 free_coro_mortal (aTHX);
1191 UNLOCK;
1192
1193 if (expect_false (prev->throw || next->throw))
1194 {
1195 struct coro *coro = SvSTATE (coro_current);
1196
1197 if (coro->throw)
607 { 1198 {
608 if (!next->ssize) 1199 SV *exception = coro->throw;
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize); 1200 coro->throw = 0;
610 1201 sv_setsv (ERRSV, exception);
611 if (!prev->ssize) 1202 croak (0);
612 prev->ssize = 1; /* mark cctx as valid ;) */
613
614 coro_transfer (&(prev->cctx), &(next->cctx));
615 } 1203 }
616
617 } 1204 }
618 else if (next->tmps_ix == -2) 1205 }
1206}
1207
1208struct transfer_args
1209{
1210 struct coro *prev, *next;
1211};
1212
1213#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1214#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1215
1216/** high level stuff ********************************************************/
1217
1218static int
1219coro_state_destroy (pTHX_ struct coro *coro)
1220{
1221 if (coro->flags & CF_DESTROYED)
1222 return 0;
1223
1224 coro->flags |= CF_DESTROYED;
1225
1226 if (coro->flags & CF_READY)
1227 {
1228 /* reduce nready, as destroying a ready coro effectively unreadies it */
1229 /* alternative: look through all ready queues and remove the coro */
1230 LOCK;
1231 --coro_nready;
1232 UNLOCK;
1233 }
1234 else
1235 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1236
1237 if (coro->mainstack && coro->mainstack != main_mainstack)
1238 {
1239 struct coro temp;
1240
1241 if (coro->flags & CF_RUNNING)
619 croak ("tried to transfer to running coroutine"); 1242 croak ("FATAL: tried to destroy currently running coroutine");
1243
1244 save_perl (aTHX_ &temp);
1245 load_perl (aTHX_ coro);
1246
1247 coro_destroy (aTHX_ coro);
1248
1249 load_perl (aTHX_ &temp);
1250
1251 coro->slot = 0;
1252 }
1253
1254 cctx_destroy (coro->cctx);
1255 SvREFCNT_dec (coro->args);
1256
1257 if (coro->next) coro->next->prev = coro->prev;
1258 if (coro->prev) coro->prev->next = coro->next;
1259 if (coro == coro_first) coro_first = coro->next;
1260
1261 return 1;
1262}
1263
1264static int
1265coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1266{
1267 struct coro *coro = (struct coro *)mg->mg_ptr;
1268 mg->mg_ptr = 0;
1269
1270 coro->hv = 0;
1271
1272 if (--coro->refcnt < 0)
1273 {
1274 coro_state_destroy (aTHX_ coro);
1275 Safefree (coro);
1276 }
1277
1278 return 0;
1279}
1280
1281static int
1282coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1283{
1284 struct coro *coro = (struct coro *)mg->mg_ptr;
1285
1286 ++coro->refcnt;
1287
1288 return 0;
1289}
1290
1291static MGVTBL coro_state_vtbl = {
1292 0, 0, 0, 0,
1293 coro_state_free,
1294 0,
1295#ifdef MGf_DUP
1296 coro_state_dup,
1297#else
1298# define MGf_DUP 0
1299#endif
1300};
1301
1302static void
1303prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1304{
1305 ta->prev = SvSTATE (prev_sv);
1306 ta->next = SvSTATE (next_sv);
1307 TRANSFER_CHECK (*ta);
1308}
1309
1310static void
1311api_transfer (SV *prev_sv, SV *next_sv)
1312{
1313 dTHX;
1314 struct transfer_args ta;
1315
1316 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1317 TRANSFER (ta);
1318}
1319
1320/** Coro ********************************************************************/
1321
1322static void
1323coro_enq (pTHX_ SV *coro_sv)
1324{
1325 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1326}
1327
1328static SV *
1329coro_deq (pTHX_ int min_prio)
1330{
1331 int prio = PRIO_MAX - PRIO_MIN;
1332
1333 min_prio -= PRIO_MIN;
1334 if (min_prio < 0)
1335 min_prio = 0;
1336
1337 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1338 if (AvFILLp (coro_ready [prio]) >= 0)
1339 return av_shift (coro_ready [prio]);
1340
1341 return 0;
1342}
1343
1344static int
1345api_ready (SV *coro_sv)
1346{
1347 dTHX;
1348 struct coro *coro;
1349
1350 if (SvROK (coro_sv))
1351 coro_sv = SvRV (coro_sv);
1352
1353 coro = SvSTATE (coro_sv);
1354
1355 if (coro->flags & CF_READY)
1356 return 0;
1357
1358 coro->flags |= CF_READY;
1359
1360 LOCK;
1361 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1362 ++coro_nready;
1363 UNLOCK;
1364
1365 return 1;
1366}
1367
1368static int
1369api_is_ready (SV *coro_sv)
1370{
1371 dTHX;
1372 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1373}
1374
1375static void
1376prepare_schedule (pTHX_ struct transfer_args *ta)
1377{
1378 SV *prev_sv, *next_sv;
1379
1380 for (;;)
1381 {
1382 LOCK;
1383 next_sv = coro_deq (aTHX_ PRIO_MIN);
1384
1385 /* nothing to schedule: call the idle handler */
1386 if (expect_false (!next_sv))
1387 {
1388 dSP;
1389 UNLOCK;
1390
1391 ENTER;
1392 SAVETMPS;
1393
1394 PUSHMARK (SP);
1395 PUTBACK;
1396 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1397
1398 FREETMPS;
1399 LEAVE;
1400 continue;
1401 }
1402
1403 ta->next = SvSTATE (next_sv);
1404
1405 /* cannot transfer to destroyed coros, skip and look for next */
1406 if (expect_false (ta->next->flags & CF_DESTROYED))
1407 {
1408 UNLOCK;
1409 SvREFCNT_dec (next_sv);
1410 /* coro_nready is already taken care of by destroy */
1411 continue;
1412 }
1413
1414 --coro_nready;
1415 UNLOCK;
1416 break;
1417 }
1418
1419 /* free this only after the transfer */
1420 prev_sv = SvRV (coro_current);
1421 ta->prev = SvSTATE (prev_sv);
1422 TRANSFER_CHECK (*ta);
1423 assert (ta->next->flags & CF_READY);
1424 ta->next->flags &= ~CF_READY;
1425 SvRV_set (coro_current, next_sv);
1426
1427 LOCK;
1428 free_coro_mortal (aTHX);
1429 coro_mortal = prev_sv;
1430 UNLOCK;
1431}
1432
1433static void
1434prepare_cede (pTHX_ struct transfer_args *ta)
1435{
1436 api_ready (coro_current);
1437 prepare_schedule (aTHX_ ta);
1438}
1439
1440static int
1441prepare_cede_notself (pTHX_ struct transfer_args *ta)
1442{
1443 if (coro_nready)
1444 {
1445 SV *prev = SvRV (coro_current);
1446 prepare_schedule (aTHX_ ta);
1447 api_ready (prev);
1448 return 1;
1449 }
1450 else
1451 return 0;
1452}
1453
1454static void
1455api_schedule (void)
1456{
1457 dTHX;
1458 struct transfer_args ta;
1459
1460 prepare_schedule (aTHX_ &ta);
1461 TRANSFER (ta);
1462}
1463
1464static int
1465api_cede (void)
1466{
1467 dTHX;
1468 struct transfer_args ta;
1469
1470 prepare_cede (aTHX_ &ta);
1471
1472 if (expect_true (ta.prev != ta.next))
1473 {
1474 TRANSFER (ta);
1475 return 1;
1476 }
1477 else
1478 return 0;
1479}
1480
1481static int
1482api_cede_notself (void)
1483{
1484 dTHX;
1485 struct transfer_args ta;
1486
1487 if (prepare_cede_notself (aTHX_ &ta))
1488 {
1489 TRANSFER (ta);
1490 return 1;
1491 }
1492 else
1493 return 0;
1494}
1495
1496static void
1497api_trace (SV *coro_sv, int flags)
1498{
1499 dTHX;
1500 struct coro *coro = SvSTATE (coro_sv);
1501
1502 if (flags & CC_TRACE)
1503 {
1504 if (!coro->cctx)
1505 coro->cctx = cctx_new ();
1506 else if (!(coro->cctx->flags & CC_TRACE))
1507 croak ("cannot enable tracing on coroutine with custom stack");
1508
1509 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1510 }
1511 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1512 {
1513 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1514
1515 if (coro->flags & CF_RUNNING)
1516 PL_runops = RUNOPS_DEFAULT;
620 else 1517 else
621 { 1518 coro->slot->runops = RUNOPS_DEFAULT;
622 SAVE (prev, -1); /* first get rid of the old state */
623
624 if (flags & TRANSFER_SAVE_CCTXT)
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 }
642 } 1519 }
643} 1520}
644 1521
645MODULE = Coro::State PACKAGE = Coro::State 1522MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
646 1523
647PROTOTYPES: ENABLE 1524PROTOTYPES: DISABLE
648 1525
649BOOT: 1526BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */ 1527{
1528#ifdef USE_ITHREADS
1529 MUTEX_INIT (&coro_mutex);
1530#endif
1531 BOOT_PAGESIZE;
1532
1533 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1534 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1535
1536 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1537 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1538
1539 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1540 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1541 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1542
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE); 1543 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652 1544
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1545 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1546 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1547 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1548 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660 1549
661 main_mainstack = PL_mainstack; 1550 main_mainstack = PL_mainstack;
662} 1551 main_top_env = PL_top_env;
663 1552
664Coro::State 1553 while (main_top_env->je_prev)
665_newprocess(args) 1554 main_top_env = main_top_env->je_prev;
666 SV * args 1555
667 PROTOTYPE: $ 1556 coroapi.ver = CORO_API_VERSION;
1557 coroapi.rev = CORO_API_REVISION;
1558 coroapi.transfer = api_transfer;
1559
1560 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1561}
1562
1563SV *
1564new (char *klass, ...)
668 CODE: 1565 CODE:
669 Coro__State coro; 1566{
1567 struct coro *coro;
1568 MAGIC *mg;
1569 HV *hv;
1570 int i;
670 1571
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); 1572 Newz (0, coro, 1, struct coro);
1573 coro->args = newAV ();
1574 coro->flags = CF_NEW;
675 1575
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1576 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1577 coro->next = coro_first;
678 coro->sptr = 0; 1578 coro_first = coro;
679 coro->ssize = 0;
680 1579
681 RETVAL = coro; 1580 coro->hv = hv = newHV ();
1581 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1582 mg->mg_flags |= MGf_DUP;
1583 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1584
1585 av_extend (coro->args, items - 1);
1586 for (i = 1; i < items; i++)
1587 av_push (coro->args, newSVsv (ST (i)));
1588}
682 OUTPUT: 1589 OUTPUT:
683 RETVAL 1590 RETVAL
684 1591
1592# these not obviously related functions are all rolled into the same xs
1593# function to increase chances that they all will call transfer with the same
1594# stack offset
685void 1595void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1596_set_stacklevel (...)
687 Coro::State_or_hashref prev 1597 ALIAS:
688 Coro::State_or_hashref next 1598 Coro::State::transfer = 1
689 int flags 1599 Coro::schedule = 2
690 PROTOTYPE: @ 1600 Coro::cede = 3
1601 Coro::cede_notself = 4
691 CODE: 1602 CODE:
692 transfer (aTHX_ prev, next, flags); 1603{
1604 struct transfer_args ta;
1605
1606 switch (ix)
1607 {
1608 case 0:
1609 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1610 ta.next = 0;
1611 break;
1612
1613 case 1:
1614 if (items != 2)
1615 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1616
1617 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1618 break;
1619
1620 case 2:
1621 prepare_schedule (aTHX_ &ta);
1622 break;
1623
1624 case 3:
1625 prepare_cede (aTHX_ &ta);
1626 break;
1627
1628 case 4:
1629 if (!prepare_cede_notself (aTHX_ &ta))
1630 XSRETURN_EMPTY;
1631
1632 break;
1633 }
1634
1635 BARRIER;
1636 PUTBACK;
1637 TRANSFER (ta);
1638 SPAGAIN; /* might be the sp of a different coroutine now */
1639 /* be extra careful not to ever do anything after TRANSFER */
1640}
1641
1642bool
1643_destroy (SV *coro_sv)
1644 CODE:
1645 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1646 OUTPUT:
1647 RETVAL
693 1648
694void 1649void
695DESTROY(coro) 1650_exit (code)
696 Coro::State coro 1651 int code
697 CODE: 1652 PROTOTYPE: $
1653 CODE:
1654 _exit (code);
698 1655
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1656int
1657cctx_stacksize (int new_stacksize = 0)
1658 CODE:
1659 RETVAL = coro_stacksize;
1660 if (new_stacksize)
1661 coro_stacksize = new_stacksize;
1662 OUTPUT:
1663 RETVAL
1664
1665int
1666cctx_count ()
1667 CODE:
1668 RETVAL = cctx_count;
1669 OUTPUT:
1670 RETVAL
1671
1672int
1673cctx_idle ()
1674 CODE:
1675 RETVAL = cctx_idle;
1676 OUTPUT:
1677 RETVAL
1678
1679void
1680list ()
1681 PPCODE:
1682{
1683 struct coro *coro;
1684 for (coro = coro_first; coro; coro = coro->next)
1685 if (coro->hv)
1686 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1687}
1688
1689void
1690call (Coro::State coro, SV *coderef)
1691 ALIAS:
1692 eval = 1
1693 CODE:
1694{
1695 if (coro->mainstack)
700 { 1696 {
701 struct coro temp; 1697 struct coro temp;
702 1698
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1699 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 1700 {
1701 save_perl (aTHX_ &temp);
1702 load_perl (aTHX_ coro);
1703 }
705 1704
706 destroy_stacks (aTHX); 1705 {
1706 dSP;
1707 ENTER;
1708 SAVETMPS;
1709 PUTBACK;
1710 PUSHSTACK;
1711 PUSHMARK (SP);
707 1712
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1713 if (ix)
1714 eval_sv (coderef, 0);
1715 else
1716 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
709 1717
710 coro->mainstack = 0; 1718 POPSTACK;
1719 SPAGAIN;
1720 FREETMPS;
1721 LEAVE;
1722 PUTBACK;
1723 }
1724
1725 if (!(coro->flags & CF_RUNNING))
1726 {
1727 save_perl (aTHX_ coro);
1728 load_perl (aTHX_ &temp);
1729 }
711 } 1730 }
1731}
712 1732
713 if (coro->sptr) 1733SV *
1734is_ready (Coro::State coro)
1735 PROTOTYPE: $
1736 ALIAS:
1737 is_ready = CF_READY
1738 is_running = CF_RUNNING
1739 is_new = CF_NEW
1740 is_destroyed = CF_DESTROYED
1741 CODE:
1742 RETVAL = boolSV (coro->flags & ix);
1743 OUTPUT:
1744 RETVAL
1745
1746void
1747api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1748
1749SV *
1750has_stack (Coro::State coro)
1751 PROTOTYPE: $
1752 CODE:
1753 RETVAL = boolSV (!!coro->cctx);
1754 OUTPUT:
1755 RETVAL
1756
1757int
1758is_traced (Coro::State coro)
1759 PROTOTYPE: $
1760 CODE:
1761 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1762 OUTPUT:
1763 RETVAL
1764
1765IV
1766rss (Coro::State coro)
1767 PROTOTYPE: $
1768 ALIAS:
1769 usecount = 1
1770 CODE:
1771 switch (ix)
1772 {
1773 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1774 case 1: RETVAL = coro->usecount; break;
1775 }
1776 OUTPUT:
1777 RETVAL
1778
1779
1780MODULE = Coro::State PACKAGE = Coro
1781
1782BOOT:
1783{
1784 int i;
1785
1786 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1787 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1788 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1789
1790 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1791 SvREADONLY_on (coro_current);
1792
1793 coro_stash = gv_stashpv ("Coro", TRUE);
1794
1795 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1796 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1797 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1798 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1799 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1800 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1801
1802 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1803 coro_ready[i] = newAV ();
1804
1805 {
1806 SV *sv = perl_get_sv ("Coro::API", TRUE);
1807 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1808
1809 coroapi.schedule = api_schedule;
1810 coroapi.cede = api_cede;
1811 coroapi.cede_notself = api_cede_notself;
1812 coroapi.ready = api_ready;
1813 coroapi.is_ready = api_is_ready;
1814 coroapi.nready = &coro_nready;
1815 coroapi.current = coro_current;
1816
1817 GCoroAPI = &coroapi;
1818 sv_setiv (sv, (IV)&coroapi);
1819 SvREADONLY_on (sv);
1820 }
1821}
1822
1823void
1824_set_current (SV *current)
1825 PROTOTYPE: $
1826 CODE:
1827 SvREFCNT_dec (SvRV (coro_current));
1828 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1829
1830int
1831prio (Coro::State coro, int newprio = 0)
1832 ALIAS:
1833 nice = 1
1834 CODE:
1835{
1836 RETVAL = coro->prio;
1837
1838 if (items > 1)
714 { 1839 {
715 deallocate_stack (coro); 1840 if (ix)
1841 newprio = coro->prio - newprio;
1842
1843 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1844 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1845
716 coro->sptr = 0; 1846 coro->prio = newprio;
717 } 1847 }
1848}
1849 OUTPUT:
1850 RETVAL
718 1851
719 Safefree (coro); 1852SV *
1853ready (SV *self)
1854 PROTOTYPE: $
1855 CODE:
1856 RETVAL = boolSV (api_ready (self));
1857 OUTPUT:
1858 RETVAL
1859
1860int
1861nready (...)
1862 PROTOTYPE:
1863 CODE:
1864 RETVAL = coro_nready;
1865 OUTPUT:
1866 RETVAL
720 1867
721void 1868void
722flush() 1869throw (Coro::State self, SV *throw = &PL_sv_undef)
1870 PROTOTYPE: $;$
1871 CODE:
1872 SvREFCNT_dec (self->throw);
1873 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1874
1875# for async_pool speedup
1876void
1877_pool_1 (SV *cb)
723 CODE: 1878 CODE:
724#ifdef MAY_FLUSH 1879{
725 flush_padlist_cache (); 1880 struct coro *coro = SvSTATE (coro_current);
726#endif 1881 HV *hv = (HV *)SvRV (coro_current);
1882 AV *defav = GvAV (PL_defgv);
1883 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1884 AV *invoke_av;
1885 int i, len;
727 1886
728MODULE = Coro::State PACKAGE = Coro::Cont 1887 if (!invoke)
1888 croak ("\3async_pool terminate\2\n");
729 1889
730# this is slightly dirty 1890 SvREFCNT_dec (coro->saved_deffh);
1891 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1892
1893 hv_store (hv, "desc", sizeof ("desc") - 1,
1894 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1895
1896 invoke_av = (AV *)SvRV (invoke);
1897 len = av_len (invoke_av);
1898
1899 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1900
1901 if (len > 0)
1902 {
1903 av_fill (defav, len - 1);
1904 for (i = 0; i < len; ++i)
1905 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1906 }
1907
1908 SvREFCNT_dec (invoke);
1909}
731 1910
732void 1911void
733yield(...) 1912_pool_2 (SV *cb)
1913 CODE:
1914{
1915 struct coro *coro = SvSTATE (coro_current);
1916
1917 sv_setsv (cb, &PL_sv_undef);
1918
1919 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1920 coro->saved_deffh = 0;
1921
1922 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1923 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1924 croak ("\3async_pool terminate\2\n");
1925
1926 av_clear (GvAV (PL_defgv));
1927 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1928 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1929
1930 coro->prio = 0;
1931
1932 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1933 api_trace (coro_current, 0);
1934
1935 av_push (av_async_pool, newSVsv (coro_current));
1936}
1937
1938
1939MODULE = Coro::State PACKAGE = Coro::AIO
1940
1941SV *
1942_get_state ()
1943 CODE:
1944{
1945 struct io_state *data;
1946
1947 RETVAL = newSV (sizeof (struct io_state));
1948 data = (struct io_state *)SvPVX (RETVAL);
1949 SvCUR_set (RETVAL, sizeof (struct io_state));
1950 SvPOK_only (RETVAL);
1951
1952 data->errorno = errno;
1953 data->laststype = PL_laststype;
1954 data->laststatval = PL_laststatval;
1955 data->statcache = PL_statcache;
1956}
1957 OUTPUT:
1958 RETVAL
1959
1960void
1961_set_state (char *data_)
734 PROTOTYPE: @ 1962 PROTOTYPE: $
735 CODE: 1963 CODE:
736 static SV *returnstk; 1964{
737 SV *sv; 1965 struct io_state *data = (void *)data_;
738 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next;
740 1966
741 if (!returnstk) 1967 errno = data->errorno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1968 PL_laststype = data->laststype;
1969 PL_laststatval = data->laststatval;
1970 PL_statcache = data->statcache;
1971}
743 1972
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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