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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.178 by root, Wed Oct 3 01:48:06 2007 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#include "libcoro/coro.c" 9#include "patchlevel.h"
10
11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
6 14
7#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
8# include <unistd.h> 16# include <unistd.h>
9# include <sys/mman.h> 17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif
10#endif 24# endif
11 25# include <limits.h>
12#define MAY_FLUSH /* increases codesize */ 26# ifndef PAGESIZE
13 27# define PAGESIZE pagesize
14/* perl-related */ 28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
15#define TRANSFER_SAVE_DEFAV 0x00000001 29static long pagesize;
16#define TRANSFER_SAVE_DEFSV 0x00000002 30# else
17#define TRANSFER_SAVE_ERRSV 0x00000004 31# define BOOT_PAGESIZE (void)0
18/* c-related */ 32# endif
19#define TRANSFER_SAVE_CCTXT 0x00000008
20#ifdef CORO_LAZY_STACK
21# define TRANSFER_LAZY_STACK 0x00000010
22#else 33#else
23# define TRANSFER_LAZY_STACK 0x00000000 34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif
44
45/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
24#endif 57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
25 74
26#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 75/* 5.8.7 */
27 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
28 79
29#define SUB_INIT "Coro::State::initialize" 80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
30#define UCORO_STATE "_coro_state" 81# undef CORO_STACKGUARD
82#endif
31 83
32/* The next macro should delcare a variable stacklevel that contains and approximation 84#ifndef CORO_STACKGUARD
33 * to the current C stack pointer. It's property is that it changes with each call 85# define CORO_STACKGUARD 0
34 * and should be unique. */ 86#endif
87
88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
92
93/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
35#define dSTACKLEVEL void *stacklevel = &stacklevel 96#define STACKLEVEL ((void *)&stacklevel)
36 97
37#define labs(l) ((l) >= 0 ? (l) : -(l)) 98#define IN_DESTRUCT (PL_main_cv == Nullcv)
38 99
39/* this is actually not only the c stack but also c registers etc... */ 100#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory")
103#else
104# define attribute(x)
105# define BARRIER
106#endif
107
108#define NOINLINE attribute ((noinline))
109
110#include "CoroAPI.h"
111
112#ifdef USE_ITHREADS
113static perl_mutex coro_mutex;
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif
120
121/* helper storage struct for Coro::AIO */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129
130static size_t coro_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */
136
137static GV *irsgv; /* $/ */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static AV *av_async_pool;
143
144static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle;
146
147enum {
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
40typedef struct { 157typedef struct coro_cctx {
41 int refcnt; /* pointer reference counter */ 158 struct coro_cctx *next;
42 int usecnt; /* shared by how many coroutines */
43 int gencnt; /* generation counter */
44 159
160 /* the stack */
161 void *sptr;
162 size_t ssize;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env;
45 coro_context cctx; 168 coro_context cctx;
46 169
47 void *sptr; 170#if CORO_USE_VALGRIND
48 long ssize; /* positive == mmap, otherwise malloc */ 171 int valgrind_id;
49} coro_stack; 172#endif
173 unsigned char flags;
174} coro_cctx;
50 175
51static coro_stack main_stack = { 1, 0, 0 }; 176enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181};
52 182
183/* this is a structure representing a perl-level coroutine */
53struct coro { 184struct coro {
54 /* the optional C context */ 185 /* the c coroutine allocated to this perl coroutine, if any */
55 coro_stack *stack; 186 coro_cctx *cctx;
56 void *cursp;
57 int gencnt;
58
59 /* optionally saved, might be zero */
60 AV *defav;
61 SV *defsv;
62 SV *errsv;
63
64 /* saved global state not related to stacks */
65 U8 dowarn;
66
67 /* the stacks and related info (callchain etc..) */
68 PERL_SI *curstackinfo;
69 AV *curstack;
70 AV *mainstack;
71 SV **stack_sp;
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV start_env;
94 JMPENV *top_env;
95 187
96 /* data associated with this coroutine (initial args) */ 188 /* data associated with this coroutine (initial args) */
97 AV *args; 189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 IO *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204
205 /* statistics */
206 int usecount; /* number of switches to this coro */
207
208 /* coro process data */
209 int prio;
210
211 /* linked list */
212 struct coro *next, *prev;
213 HV *hv; /* the perl hash associated with this coro, if any */
98}; 214};
99 215
100typedef struct coro *Coro__State; 216typedef struct coro *Coro__State;
101typedef struct coro *Coro__State_or_hashref; 217typedef struct coro *Coro__State_or_hashref;
102 218
103static AV *main_mainstack; /* used to differentiate between $main and others */ 219/** Coro ********************************************************************/
104static HV *coro_state_stash;
105static SV *ucoro_state_sv;
106static U32 ucoro_state_hash;
107static HV *padlist_cache;
108 220
109/* mostly copied from op.c:cv_clone2 */ 221#define PRIO_MAX 3
110STATIC AV * 222#define PRIO_HIGH 1
111clone_padlist (AV *protopadlist) 223#define PRIO_NORMAL 0
224#define PRIO_LOW -1
225#define PRIO_IDLE -3
226#define PRIO_MIN -4
227
228/* for Coro.pm */
229static SV *coro_current;
230static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
231static int coro_nready;
232static struct coro *coro_first;
233
234/** lowlevel stuff **********************************************************/
235
236static AV *
237coro_clone_padlist (pTHX_ CV *cv)
112{ 238{
113 AV *av; 239 AV *padlist = CvPADLIST (cv);
114 I32 ix;
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117 SV **pname = AvARRAY (protopad_name);
118 SV **ppad = AvARRAY (protopad);
119 I32 fname = AvFILLp (protopad_name);
120 I32 fpad = AvFILLp (protopad);
121 AV *newpadlist, *newpad_name, *newpad; 240 AV *newpadlist, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 241
132 newpadlist = newAV (); 242 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 243 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 244#if PERL_VERSION_ATLEAST (5,9,0)
245 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
246#else
247 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
248#endif
249 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
250 --AvFILLp (padlist);
251
252 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135 av_store (newpadlist, 1, (SV *) newpad); 253 av_store (newpadlist, 1, (SV *)newpad);
136 254
137 av = newAV (); /* will be @_ */ 255 return newpadlist;
138 av_extend (av, 0); 256}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 257
142 for (ix = fpad; ix > 0; ix--) 258static void
259free_padlist (pTHX_ AV *padlist)
260{
261 /* may be during global destruction */
262 if (SvREFCNT (padlist))
143 { 263 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 264 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 265 while (i >= 0)
146 { 266 {
147 char *name = SvPVX (namesv); /* XXX */ 267 SV **svp = av_fetch (padlist, i--, FALSE);
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 268 if (svp)
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 269 {
152 else
153 { /* our own lexical */
154 SV *sv; 270 SV *sv;
155 if (*name == '&') 271 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156 sv = SvREFCNT_inc (ppad[ix]); 272 SvREFCNT_dec (sv);
157 else if (*name == '@') 273
158 sv = (SV *) newAV (); 274 SvREFCNT_dec (*svp);
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 } 275 }
167 } 276 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179 277
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC AV *
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist); 278 SvREFCNT_dec ((SV*)padlist);
220 } 279 }
221} 280}
222#endif 281
282static int
283coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
284{
285 AV *padlist;
286 AV *av = (AV *)mg->mg_obj;
287
288 /* casting is fun. */
289 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
290 free_padlist (aTHX_ padlist);
291
292 SvREFCNT_dec (av);
293
294 return 0;
295}
296
297#define PERL_MAGIC_coro PERL_MAGIC_ext
298
299static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
300
301#define CORO_MAGIC(cv) \
302 SvMAGIC (cv) \
303 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
304 ? SvMAGIC (cv) \
305 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
306 : 0
307
308static struct coro *
309SvSTATE_ (pTHX_ SV *coro)
310{
311 HV *stash;
312 MAGIC *mg;
313
314 if (SvROK (coro))
315 coro = SvRV (coro);
316
317 if (SvTYPE (coro) != SVt_PVHV)
318 croak ("Coro::State object required");
319
320 stash = SvSTASH (coro);
321 if (stash != coro_stash && stash != coro_state_stash)
322 {
323 /* very slow, but rare, check */
324 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
325 croak ("Coro::State object required");
326 }
327
328 mg = CORO_MAGIC (coro);
329 return (struct coro *)mg->mg_ptr;
330}
331
332#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
223 333
224/* the next two functions merely cache the padlists */ 334/* the next two functions merely cache the padlists */
225STATIC void 335static void
226get_padlist (CV *cv) 336get_padlist (pTHX_ CV *cv)
227{ 337{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 338 MAGIC *mg = CORO_MAGIC (cv);
339 AV *av;
229 340
230 if (he && AvFILLp ((AV *)*he) >= 0) 341 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 342 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232 else 343 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 { 344 {
345#if CORO_PREFER_PERL_FUNCTIONS
346 /* this is probably cleaner, but also slower? */
347 CV *cp = Perl_cv_clone (cv);
348 CvPADLIST (cv) = CvPADLIST (cp);
349 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (*he); 350 SvREFCNT_dec (cp);
244 *he = (SV *)newAV (); 351#else
352 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
353#endif
245 } 354 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248} 355}
249 356
250#ifdef MAY_FLUSH 357static void
251STATIC void 358put_padlist (pTHX_ CV *cv)
252flush_padlist_cache ()
253{ 359{
254 HV *hv = padlist_cache; 360 MAGIC *mg = CORO_MAGIC (cv);
255 padlist_cache = newHV (); 361 AV *av;
256 362
257 if (hv_iterinit (hv)) 363 if (!mg)
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 } 364 {
365 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
366 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
367 mg->mg_virtual = &vtbl_coro;
368 mg->mg_obj = (SV *)newAV ();
369 }
271 370
272 SvREFCNT_dec (hv); 371 av = (AV *)mg->mg_obj;
273}
274#endif
275 372
276#define SB do { 373 if (AvFILLp (av) >= AvMAX (av))
277#define SE } while (0) 374 av_extend (av, AvMAX (av) + 1);
278 375
279#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 376 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 377}
281 378
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 379/** load & save, init *******************************************************/
283 380
284static void 381static void
285load_state(pTHX_ Coro__State c) 382load_perl (pTHX_ Coro__State c)
286{ 383{
287 PL_dowarn = c->dowarn; 384#define VAR(name,type) PL_ ## name = c->name;
385# include "state.h"
386#undef VAR
288 387
289 PL_curstackinfo = c->curstackinfo; 388 GvSV (PL_defgv) = c->defsv;
290 PL_curstack = c->curstack; 389 GvAV (PL_defgv) = c->defav;
291 PL_mainstack = c->mainstack; 390 GvSV (PL_errgv) = c->errsv;
292 PL_stack_sp = c->stack_sp; 391 GvIOp(PL_defoutgv) = c->deffh;
293 PL_op = c->op; 392 PL_rs = c->irssv;
294 PL_curpad = c->curpad; 393 GvSV (irsgv) = c->irssv_sv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_start_env = c->start_env;
315 PL_top_env = c->top_env;
316
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320 394
321 { 395 {
322 dSP; 396 dSP;
323 CV *cv; 397 CV *cv;
324 398
325 /* now do the ugly restore mess */ 399 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 400 while ((cv = (CV *)POPs))
327 { 401 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 402 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 403 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 404 CvPADLIST (cv) = (AV *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 405 }
341 406
342 PUTBACK; 407 PUTBACK;
343 } 408 }
344} 409}
345 410
346static void 411static void
347save_state(pTHX_ Coro__State c, int flags) 412save_perl (pTHX_ Coro__State c)
348{ 413{
349 { 414 {
350 dSP; 415 dSP;
351 I32 cxix = cxstack_ix; 416 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 417 PERL_CONTEXT *ccstk = cxstack;
… …
355 /* 420 /*
356 * the worst thing you can imagine happens first - we have to save 421 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 422 * (and reinitialize) all cv's in the whole callchain :(
358 */ 423 */
359 424
360 PUSHs (Nullsv); 425 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 426 /* this loop was inspired by pp_caller */
362 for (;;) 427 for (;;)
363 { 428 {
364 do 429 while (cxix >= 0)
365 { 430 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 431 PERL_CONTEXT *cx = &ccstk[cxix--];
367 432
368 if (CxTYPE(cx) == CXt_SUB) 433 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
369 { 434 {
370 CV *cv = cx->blk_sub.cv; 435 CV *cv = cx->blk_sub.cv;
436
371 if (CvDEPTH(cv)) 437 if (CvDEPTH (cv))
372 { 438 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 439 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 440 PUSHs ((SV *)CvPADLIST (cv));
441 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 442 PUSHs ((SV *)cv);
389 443
390 get_padlist (cv); /* this is a monster */ 444 CvDEPTH (cv) = 0;
445 get_padlist (aTHX_ cv);
391 } 446 }
392 } 447 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 448 }
400 while (cxix >= 0);
401 449
402 if (top_si->si_type == PERLSI_MAIN) 450 if (top_si->si_type == PERLSI_MAIN)
403 break; 451 break;
404 452
405 top_si = top_si->si_prev; 453 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 454 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 455 cxix = top_si->si_cxix;
408 } 456 }
409 457
410 PUTBACK; 458 PUTBACK;
411 } 459 }
412 460
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 461 c->defav = GvAV (PL_defgv);
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 462 c->defsv = DEFSV;
415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 463 c->errsv = ERRSV;
464 c->deffh = GvIOp (PL_defoutgv);
465 c->irssv = PL_rs;
466 c->irssv_sv = GvSV (irsgv);
416 467
417 /* I have not the slightest idea of why av_reify is necessary */ 468#define VAR(name,type)c->name = PL_ ## name;
418 /* but if it's missing the defav contents magically get replaced sometimes */ 469# include "state.h"
419 if (c->defav) 470#undef VAR
420 av_reify (c->defav);
421
422 c->dowarn = PL_dowarn;
423
424 c->curstackinfo = PL_curstackinfo;
425 c->curstack = PL_curstack;
426 c->mainstack = PL_mainstack;
427 c->stack_sp = PL_stack_sp;
428 c->op = PL_op;
429 c->curpad = PL_curpad;
430 c->stack_base = PL_stack_base;
431 c->stack_max = PL_stack_max;
432 c->tmps_stack = PL_tmps_stack;
433 c->tmps_floor = PL_tmps_floor;
434 c->tmps_ix = PL_tmps_ix;
435 c->tmps_max = PL_tmps_max;
436 c->markstack = PL_markstack;
437 c->markstack_ptr = PL_markstack_ptr;
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->start_env = PL_start_env;
450 c->top_env = PL_top_env;
451} 471}
452 472
453/* 473/*
454 * allocate various perl stacks. This is an exact copy 474 * allocate various perl stacks. This is an exact copy
455 * of perl.c:init_stacks, except that it uses less memory 475 * of perl.c:init_stacks, except that it uses less memory
456 * on the assumption that coroutines do not usually need 476 * on the (sometimes correct) assumption that coroutines do
457 * a lot of stackspace. 477 * not usually need a lot of stackspace.
458 */ 478 */
459STATIC void 479#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks
481#else
482static void
460coro_init_stacks (pTHX) 483coro_init_stacks (pTHX)
461{ 484{
462 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 485 PL_curstackinfo = new_stackinfo(64, 6);
463 PL_curstackinfo->si_type = PERLSI_MAIN; 486 PL_curstackinfo->si_type = PERLSI_MAIN;
464 PL_curstack = PL_curstackinfo->si_stack; 487 PL_curstack = PL_curstackinfo->si_stack;
465 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466 489
467 PL_stack_base = AvARRAY(PL_curstack); 490 PL_stack_base = AvARRAY(PL_curstack);
468 PL_stack_sp = PL_stack_base; 491 PL_stack_sp = PL_stack_base;
469 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470 493
471 New(50,PL_tmps_stack,96,SV*); 494 New(50,PL_tmps_stack,64,SV*);
472 PL_tmps_floor = -1; 495 PL_tmps_floor = -1;
473 PL_tmps_ix = -1; 496 PL_tmps_ix = -1;
474 PL_tmps_max = 96; 497 PL_tmps_max = 64;
475 498
476 New(54,PL_markstack,16,I32); 499 New(54,PL_markstack,16,I32);
477 PL_markstack_ptr = PL_markstack; 500 PL_markstack_ptr = PL_markstack;
478 PL_markstack_max = PL_markstack + 16; 501 PL_markstack_max = PL_markstack + 16;
479 502
503#ifdef SET_MARK_OFFSET
480 SET_MARK_OFFSET; 504 SET_MARK_OFFSET;
505#endif
481 506
482 New(54,PL_scopestack,16,I32); 507 New(54,PL_scopestack,16,I32);
483 PL_scopestack_ix = 0; 508 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 509 PL_scopestack_max = 16;
485 510
486 New(54,PL_savestack,96,ANY); 511 New(54,PL_savestack,64,ANY);
487 PL_savestack_ix = 0; 512 PL_savestack_ix = 0;
488 PL_savestack_max = 96; 513 PL_savestack_max = 64;
489 514
515#if !PERL_VERSION_ATLEAST (5,9,0)
490 New(54,PL_retstack,8,OP*); 516 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 517 PL_retstack_ix = 0;
492 PL_retstack_max = 8; 518 PL_retstack_max = 4;
519#endif
493} 520}
521#endif
494 522
495/* 523/*
496 * destroy the stacks, the callchain etc... 524 * destroy the stacks, the callchain etc...
497 * still there is a memleak of 128 bytes...
498 */ 525 */
499STATIC void 526static void
500destroy_stacks(pTHX) 527coro_destroy_stacks (pTHX)
501{ 528{
502 /* is this ugly, I ask? */
503 while (PL_scopestack_ix)
504 LEAVE;
505
506 /* sure it is, but more important: is it correct?? :/ */
507 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508 FREETMPS;
509
510 while (PL_curstackinfo->si_next) 529 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 530 PL_curstackinfo = PL_curstackinfo->si_next;
512 531
513 while (PL_curstackinfo) 532 while (PL_curstackinfo)
514 { 533 {
515 PERL_SI *p = PL_curstackinfo->si_prev; 534 PERL_SI *p = PL_curstackinfo->si_prev;
516 535
517 { 536 if (!IN_DESTRUCT)
518 dSP;
519 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520 PUTBACK; /* possibly superfluous */
521 }
522
523 dounwind(-1);
524
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 537 SvREFCNT_dec (PL_curstackinfo->si_stack);
538
526 Safefree(PL_curstackinfo->si_cxstack); 539 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 540 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 541 PL_curstackinfo = p;
529 } 542 }
530 543
531 Safefree(PL_tmps_stack); 544 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 545 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 546 Safefree (PL_scopestack);
534 Safefree(PL_savestack); 547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
535 Safefree(PL_retstack); 549 Safefree (PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#ifdef HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif 550#endif
551}
552
553static size_t
554coro_rss (pTHX_ struct coro *coro)
555{
556 size_t rss = sizeof (coro);
557
558 if (coro->mainstack)
559 {
560 if (coro->flags & CF_RUNNING)
555 { 561 {
556 /*FIXME*//*D*//* reasonable stack size! */ 562 #define VAR(name,type)coro->name = PL_ ## name;
557 stack->ssize = -4096 * sizeof (long); 563 # include "state.h"
558 New (0, stack->sptr, 4096, long); 564 #undef VAR
559 } 565 }
560 }
561 else
562 stack->sptr = 0;
563 566
564 ctx->stack = stack; 567 rss += sizeof (coro->curstackinfo);
565} 568 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
566 575
567static void 576#if !PERL_VERSION_ATLEAST (5,9,0)
568deallocate_stack (Coro__State ctx) 577 rss += coro->retstack_max * sizeof (OP *);
569{ 578#endif
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 { 579 }
576 if (!--stack->refcnt)
577 {
578#ifdef HAVE_MMAP
579 if (stack->ssize > 0 && stack->sptr)
580 munmap (stack->sptr, stack->ssize);
581 else
582#else
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 }
587 else if (ctx->gencnt == stack->gencnt)
588 --stack->usecnt;
589 }
590}
591 580
581 return rss;
582}
583
584/** coroutine stack handling ************************************************/
585
592static void 586static void
593setup_coro (void *arg) 587setup_coro (pTHX_ struct coro *coro)
594{ 588{
595 /* 589 /*
596 * emulate part of the perl startup here. 590 * emulate part of the perl startup here.
597 */ 591 */
592 coro_init_stacks (aTHX);
593
594 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0;
598 PL_curpm = 0;
599 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0;
602
603 GvSV (PL_defgv) = NEWSV (0, 0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0);
606 GvSV (irsgv) = newSVsv (PL_rs);
607 PL_rs = newSVpvn ("\n", 1);
608
609 {
610 IO *io = newIO ();
611 GvIOp(PL_defoutgv) = io;
612 IoTYPE (io) = IoTYPE_WRONLY;
613 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
614 IoFLAGS (io) |= IOf_FLUSH;
615 }
616
617 {
618 dSP;
619 LOGOP myop;
620
621 Zero (&myop, 1, LOGOP);
622 myop.op_next = Nullop;
623 myop.op_flags = OPf_WANT_VOID;
624
625 PUSHMARK (SP);
626 XPUSHs (av_shift (GvAV (PL_defgv)));
627 PUTBACK;
628 PL_op = (OP *)&myop;
629 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
630 SPAGAIN;
631 }
632
633 ENTER; /* necessary e.g. for dounwind */
634}
635
636static void
637destroy_coro (pTHX_ struct coro *coro)
638{
639 if (!IN_DESTRUCT)
640 {
641 /* restore all saved variables and stuff */
642 LEAVE_SCOPE (0);
643 assert (PL_tmps_floor == -1);
644
645 /* free all temporaries */
646 FREETMPS;
647 assert (PL_tmps_ix == -1);
648
649 /* unwind all extra stacks */
650 POPSTACK_TO (PL_mainstack);
651
652 /* unwind main stack */
653 dounwind (-1);
654 }
655
656 SvREFCNT_dec (GvSV (PL_defgv));
657 SvREFCNT_dec (GvAV (PL_defgv));
658 SvREFCNT_dec (GvSV (PL_errgv));
659 SvREFCNT_dec (GvIOp(PL_defoutgv));
660 SvREFCNT_dec (PL_rs);
661 SvREFCNT_dec (GvSV (irsgv));
662
663 coro_destroy_stacks (aTHX);
664}
665
666static void
667free_coro_mortal (pTHX)
668{
669 if (coro_mortal)
670 {
671 SvREFCNT_dec (coro_mortal);
672 coro_mortal = 0;
673 }
674}
675
676static int
677runops_trace (pTHX)
678{
679 COP *oldcop = 0;
680 int oldcxix = -2;
681 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
682 coro_cctx *cctx = coro->cctx;
683
684 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
685 {
686 PERL_ASYNC_CHECK ();
687
688 if (cctx->flags & CC_TRACE_ALL)
689 {
690 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
691 {
692 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
693 SV **bot, **top;
694 AV *av = newAV (); /* return values */
695 SV **cb;
696 dSP;
697
698 GV *gv = CvGV (cx->blk_sub.cv);
699 SV *fullname = sv_2mortal (newSV (0));
700 if (isGV (gv))
701 gv_efullname3 (fullname, gv, 0);
702
703 bot = PL_stack_base + cx->blk_oldsp + 1;
704 top = cx->blk_gimme == G_ARRAY ? SP + 1
705 : cx->blk_gimme == G_SCALAR ? bot + 1
706 : bot;
707
708 while (bot < top)
709 av_push (av, SvREFCNT_inc (*bot++));
710
711 PL_runops = RUNOPS_DEFAULT;
712 ENTER;
713 SAVETMPS;
714 EXTEND (SP, 3);
715 PUSHMARK (SP);
716 PUSHs (&PL_sv_no);
717 PUSHs (fullname);
718 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
719 PUTBACK;
720 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
721 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
722 SPAGAIN;
723 FREETMPS;
724 LEAVE;
725 PL_runops = runops_trace;
726 }
727
728 if (oldcop != PL_curcop)
729 {
730 oldcop = PL_curcop;
731
732 if (PL_curcop != &PL_compiling)
733 {
734 SV **cb;
735
736 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
737 {
738 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739
740 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
741 {
742 runops_proc_t old_runops = PL_runops;
743 dSP;
744 GV *gv = CvGV (cx->blk_sub.cv);
745 SV *fullname = sv_2mortal (newSV (0));
746
747 if (isGV (gv))
748 gv_efullname3 (fullname, gv, 0);
749
750 PL_runops = RUNOPS_DEFAULT;
751 ENTER;
752 SAVETMPS;
753 EXTEND (SP, 3);
754 PUSHMARK (SP);
755 PUSHs (&PL_sv_yes);
756 PUSHs (fullname);
757 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
758 PUTBACK;
759 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
760 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
761 SPAGAIN;
762 FREETMPS;
763 LEAVE;
764 PL_runops = runops_trace;
765 }
766
767 oldcxix = cxstack_ix;
768 }
769
770 if (cctx->flags & CC_TRACE_LINE)
771 {
772 dSP;
773
774 PL_runops = RUNOPS_DEFAULT;
775 ENTER;
776 SAVETMPS;
777 EXTEND (SP, 3);
778 PL_runops = RUNOPS_DEFAULT;
779 PUSHMARK (SP);
780 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
781 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
782 PUTBACK;
783 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
784 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
785 SPAGAIN;
786 FREETMPS;
787 LEAVE;
788 PL_runops = runops_trace;
789 }
790 }
791 }
792 }
793 }
794
795 TAINT_NOT;
796 return 0;
797}
798
799/* inject a fake call to Coro::State::_cctx_init into the execution */
800/* _cctx_init should be careful, as it could be called at almost any time */
801/* during execution of a perl program */
802static void NOINLINE
803prepare_cctx (pTHX_ coro_cctx *cctx)
804{
598 dSP; 805 dSP;
599 Coro__State ctx = (Coro__State)arg; 806 LOGOP myop;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601 807
602 coro_init_stacks (aTHX); 808 PL_top_env = &PL_start_env;
603 JMPENV_BOOTSTRAP; 809
810 if (cctx->flags & CC_TRACE)
811 PL_runops = runops_trace;
812
813 Zero (&myop, 1, LOGOP);
814 myop.op_next = PL_op;
815 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
816
817 PUSHMARK (SP);
818 EXTEND (SP, 2);
819 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
820 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
821 PUTBACK;
822 PL_op = (OP *)&myop;
823 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
604 SPAGAIN; 824 SPAGAIN;
825}
605 826
606 /*PL_curcop = 0;*/ 827/*
607 SvREFCNT_dec (GvAV (PL_defgv)); 828 * this is a _very_ stripped down perl interpreter ;)
608 GvAV (PL_defgv) = ctx->args; 829 */
830static void
831coro_run (void *arg)
832{
833 dTHX;
609 834
610 if (ctx->stack) 835 /* coro_run is the alternative tail of transfer(), so unlock here. */
611 { 836 UNLOCK;
612 ctx->cursp = 0;
613 837
614 PUSHMARK(SP); 838 /* we now skip the entersub that lead to transfer() */
615 PUTBACK; 839 PL_op = PL_op->op_next;
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 840
617 croak ("FATAL: CCTXT coroutine returned!"); 841 /* inject a fake subroutine call to cctx_init */
842 prepare_cctx (aTHX_ (coro_cctx *)arg);
843
844 /* somebody or something will hit me for both perl_run and PL_restartop */
845 PL_restartop = PL_op;
846 perl_run (PL_curinterp);
847
848 /*
849 * If perl-run returns we assume exit() was being called or the coro
850 * fell off the end, which seems to be the only valid (non-bug)
851 * reason for perl_run to return. We try to exit by jumping to the
852 * bootstrap-time "top" top_env, as we cannot restore the "main"
853 * coroutine as Coro has no such concept
854 */
855 PL_top_env = main_top_env;
856 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
857}
858
859static coro_cctx *
860cctx_new ()
861{
862 coro_cctx *cctx;
863 void *stack_start;
864 size_t stack_size;
865
866 ++cctx_count;
867
868 Newz (0, cctx, 1, coro_cctx);
869
870#if HAVE_MMAP
871
872 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
873 /* mmap supposedly does allocate-on-write for us */
874 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
875
876 if (cctx->sptr != (void *)-1)
877 {
878# if CORO_STACKGUARD
879 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
880# endif
881 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
882 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
883 cctx->flags |= CC_MAPPED;
618 } 884 }
619 else 885 else
620 { 886#endif
621 UNOP myop;
622
623 PL_op = (OP *)&myop;
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 } 887 {
644} 888 cctx->ssize = coro_stacksize * (long)sizeof (long);
889 New (0, cctx->sptr, coro_stacksize, long);
645 890
646static void 891 if (!cctx->sptr)
647continue_coro (void *arg) 892 {
648{ 893 perror ("FATAL: unable to allocate stack for coroutine");
649 /* 894 _exit (EXIT_FAILURE);
650 * this is a _very_ stripped down perl interpreter ;) 895 }
651 */
652 Coro__State ctx = (Coro__State)arg;
653 896
654 ctx->cursp = 0; 897 stack_start = cctx->sptr;
655 PL_op = PL_op->op_next; 898 stack_size = cctx->ssize;
656 CALLRUNOPS(aTHX); 899 }
657 /*NORETURN*/
658 abort ();
659}
660 900
661STATIC void 901 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
902 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
903
904 return cctx;
905}
906
907static void
908cctx_destroy (coro_cctx *cctx)
909{
910 if (!cctx)
911 return;
912
913 --cctx_count;
914
915#if CORO_USE_VALGRIND
916 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
917#endif
918
919#if HAVE_MMAP
920 if (cctx->flags & CC_MAPPED)
921 munmap (cctx->sptr, cctx->ssize);
922 else
923#endif
924 Safefree (cctx->sptr);
925
926 Safefree (cctx);
927}
928
929static coro_cctx *
930cctx_get (pTHX)
931{
932 while (cctx_first)
933 {
934 coro_cctx *cctx = cctx_first;
935 cctx_first = cctx->next;
936 --cctx_idle;
937
938 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
939 return cctx;
940
941 cctx_destroy (cctx);
942 }
943
944 return cctx_new ();
945}
946
947static void
948cctx_put (coro_cctx *cctx)
949{
950 /* free another cctx if overlimit */
951 if (cctx_idle >= MAX_IDLE_CCTX)
952 {
953 coro_cctx *first = cctx_first;
954 cctx_first = first->next;
955 --cctx_idle;
956
957 cctx_destroy (first);
958 }
959
960 ++cctx_idle;
961 cctx->next = cctx_first;
962 cctx_first = cctx;
963}
964
965/** coroutine switching *****************************************************/
966
967static void NOINLINE
968transfer_check (pTHX_ struct coro *prev, struct coro *next)
969{
970 if (prev != next)
971 {
972 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
973 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
974
975 if (next->flags & CF_RUNNING)
976 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
977
978 if (next->flags & CF_DESTROYED)
979 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
980
981 if (PL_lex_state != LEX_NOTPARSING)
982 croak ("Coro::State::transfer called while parsing, but this is not supported");
983 }
984}
985
986/* always use the TRANSFER macro */
987static void NOINLINE
662transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 988transfer (pTHX_ struct coro *prev, struct coro *next)
663{ 989{
664 dSP;
665 dSTACKLEVEL; 990 dSTACKLEVEL;
666 991
992 /* sometimes transfer is only called to set idle_sp */
993 if (!next)
994 {
995 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
996 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
997 }
667 if (prev != next) 998 else if (prev != next)
668 { 999 {
669 if (next->mainstack) 1000 coro_cctx *prev__cctx;
1001
1002 if (prev->flags & CF_NEW)
670 { 1003 {
671 SAVE (prev, flags); 1004 /* create a new empty context */
672 LOAD (next); 1005 Newz (0, prev->cctx, 1, coro_cctx);
673 1006 prev->flags &= ~CF_NEW;
674 /* mark this state as in-use */ 1007 prev->flags |= CF_RUNNING;
675 next->mainstack = 0;
676 next->tmps_ix = -2;
677
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 {
681 if (!prev->stack)
682 allocate_stack (prev, 0);
683 else if (prev->cursp != stacklevel
684 && prev->stack->usecnt > 1)
685 {
686 prev->gencnt = ++prev->stack->gencnt;
687 prev->stack->usecnt = 1;
688 }
689
690 /* has our stack been invalidated? */
691 if (next->stack && next->stack->gencnt != next->gencnt)
692 {
693 deallocate_stack (next);
694 allocate_stack (next, 1);
695 coro_create (&(next->stack->cctx),
696 continue_coro, (void *)next,
697 next->stack->sptr, labs (next->stack->ssize));
698 }
699
700 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
701 }
702
703 } 1008 }
704 else if (next->tmps_ix == -2) 1009
705 croak ("tried to transfer to running coroutine"); 1010 prev->flags &= ~CF_RUNNING;
1011 next->flags |= CF_RUNNING;
1012
1013 LOCK;
1014
1015 if (next->flags & CF_NEW)
1016 {
1017 /* need to start coroutine */
1018 next->flags &= ~CF_NEW;
1019 /* first get rid of the old state */
1020 save_perl (aTHX_ prev);
1021 /* setup coroutine call */
1022 setup_coro (aTHX_ next);
1023 }
706 else 1024 else
707 { 1025 {
708 SAVE (prev, -1); /* first get rid of the old state */ 1026 /* coroutine already started */
709 1027 save_perl (aTHX_ prev);
710 if (flags & TRANSFER_SAVE_CCTXT) 1028 load_perl (aTHX_ next);
711 {
712 if (!prev->stack)
713 allocate_stack (prev, 0);
714
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 {
717 setup_coro (next);
718
719 prev->stack->refcnt++;
720 prev->stack->usecnt++;
721 next->stack = prev->stack;
722 next->gencnt = prev->gencnt;
723 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 }
732 }
733 else
734 setup_coro (next);
735 } 1029 }
1030
1031 prev__cctx = prev->cctx;
1032
1033 /* possibly "free" the cctx */
1034 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1035 {
1036 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1037 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1038
1039 prev->cctx = 0;
1040
1041 cctx_put (prev__cctx);
1042 }
1043
1044 ++next->usecount;
1045
1046 if (!next->cctx)
1047 next->cctx = cctx_get (aTHX);
1048
1049 if (prev__cctx != next->cctx)
1050 {
1051 prev__cctx->top_env = PL_top_env;
1052 PL_top_env = next->cctx->top_env;
1053 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1054 }
1055
1056 free_coro_mortal (aTHX);
1057 UNLOCK;
1058 }
1059}
1060
1061struct transfer_args
1062{
1063 struct coro *prev, *next;
1064};
1065
1066#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1067#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1068
1069/** high level stuff ********************************************************/
1070
1071static int
1072coro_state_destroy (pTHX_ struct coro *coro)
1073{
1074 if (coro->flags & CF_DESTROYED)
1075 return 0;
1076
1077 coro->flags |= CF_DESTROYED;
1078
1079 if (coro->flags & CF_READY)
736 } 1080 {
1081 /* reduce nready, as destroying a ready coro effectively unreadies it */
1082 /* alternative: look through all ready queues and remove the coro */
1083 LOCK;
1084 --coro_nready;
1085 UNLOCK;
1086 }
1087 else
1088 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
737 1089
738 next->cursp = stacklevel; 1090 if (coro->mainstack && coro->mainstack != main_mainstack)
739} 1091 {
1092 struct coro temp;
740 1093
1094 if (coro->flags & CF_RUNNING)
1095 croak ("FATAL: tried to destroy currently running coroutine");
1096
1097 save_perl (aTHX_ &temp);
1098 load_perl (aTHX_ coro);
1099
1100 destroy_coro (aTHX_ coro);
1101
1102 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1103
1104 coro->mainstack = 0;
1105 }
1106
1107 cctx_destroy (coro->cctx);
1108 SvREFCNT_dec (coro->args);
1109
1110 if (coro->next) coro->next->prev = coro->prev;
1111 if (coro->prev) coro->prev->next = coro->next;
1112 if (coro == coro_first) coro_first = coro->next;
1113
1114 return 1;
1115}
1116
1117static int
1118coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 struct coro *coro = (struct coro *)mg->mg_ptr;
1121 mg->mg_ptr = 0;
1122
1123 coro->hv = 0;
1124
1125 if (--coro->refcnt < 0)
1126 {
1127 coro_state_destroy (aTHX_ coro);
1128 Safefree (coro);
1129 }
1130
1131 return 0;
1132}
1133
1134static int
1135coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1136{
1137 struct coro *coro = (struct coro *)mg->mg_ptr;
1138
1139 ++coro->refcnt;
1140
1141 return 0;
1142}
1143
1144static MGVTBL coro_state_vtbl = {
1145 0, 0, 0, 0,
1146 coro_state_free,
1147 0,
1148#ifdef MGf_DUP
1149 coro_state_dup,
1150#else
1151# define MGf_DUP 0
1152#endif
1153};
1154
1155static void
1156prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1157{
1158 ta->prev = SvSTATE (prev_sv);
1159 ta->next = SvSTATE (next_sv);
1160 TRANSFER_CHECK (*ta);
1161}
1162
1163static void
1164api_transfer (SV *prev_sv, SV *next_sv)
1165{
1166 dTHX;
1167 struct transfer_args ta;
1168
1169 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1170 TRANSFER (ta);
1171}
1172
1173/** Coro ********************************************************************/
1174
1175static void
1176coro_enq (pTHX_ SV *coro_sv)
1177{
1178 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1179}
1180
1181static SV *
1182coro_deq (pTHX_ int min_prio)
1183{
1184 int prio = PRIO_MAX - PRIO_MIN;
1185
1186 min_prio -= PRIO_MIN;
1187 if (min_prio < 0)
1188 min_prio = 0;
1189
1190 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1191 if (AvFILLp (coro_ready [prio]) >= 0)
1192 return av_shift (coro_ready [prio]);
1193
1194 return 0;
1195}
1196
1197static int
1198api_ready (SV *coro_sv)
1199{
1200 dTHX;
1201 struct coro *coro;
1202
1203 if (SvROK (coro_sv))
1204 coro_sv = SvRV (coro_sv);
1205
1206 coro = SvSTATE (coro_sv);
1207
1208 if (coro->flags & CF_READY)
1209 return 0;
1210
1211 coro->flags |= CF_READY;
1212
1213 LOCK;
1214 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1215 ++coro_nready;
1216 UNLOCK;
1217
1218 return 1;
1219}
1220
1221static int
1222api_is_ready (SV *coro_sv)
1223{
1224 dTHX;
1225 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1226}
1227
1228static void
1229prepare_schedule (pTHX_ struct transfer_args *ta)
1230{
1231 SV *prev_sv, *next_sv;
1232
1233 for (;;)
1234 {
1235 LOCK;
1236 next_sv = coro_deq (aTHX_ PRIO_MIN);
1237
1238 /* nothing to schedule: call the idle handler */
1239 if (!next_sv)
1240 {
1241 dSP;
1242 UNLOCK;
1243
1244 ENTER;
1245 SAVETMPS;
1246
1247 PUSHMARK (SP);
1248 PUTBACK;
1249 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1250
1251 FREETMPS;
1252 LEAVE;
1253 continue;
1254 }
1255
1256 ta->next = SvSTATE (next_sv);
1257
1258 /* cannot transfer to destroyed coros, skip and look for next */
1259 if (ta->next->flags & CF_DESTROYED)
1260 {
1261 UNLOCK;
1262 SvREFCNT_dec (next_sv);
1263 /* coro_nready is already taken care of by destroy */
1264 continue;
1265 }
1266
1267 --coro_nready;
1268 UNLOCK;
1269 break;
1270 }
1271
1272 /* free this only after the transfer */
1273 prev_sv = SvRV (coro_current);
1274 ta->prev = SvSTATE (prev_sv);
1275 TRANSFER_CHECK (*ta);
1276 assert (ta->next->flags & CF_READY);
1277 ta->next->flags &= ~CF_READY;
1278 SvRV_set (coro_current, next_sv);
1279
1280 LOCK;
1281 free_coro_mortal (aTHX);
1282 coro_mortal = prev_sv;
1283 UNLOCK;
1284}
1285
1286static void
1287prepare_cede (pTHX_ struct transfer_args *ta)
1288{
1289 api_ready (coro_current);
1290 prepare_schedule (aTHX_ ta);
1291}
1292
1293static int
1294prepare_cede_notself (pTHX_ struct transfer_args *ta)
1295{
1296 if (coro_nready)
1297 {
1298 SV *prev = SvRV (coro_current);
1299 prepare_schedule (aTHX_ ta);
1300 api_ready (prev);
1301 return 1;
1302 }
1303 else
1304 return 0;
1305}
1306
1307static void
1308api_schedule (void)
1309{
1310 dTHX;
1311 struct transfer_args ta;
1312
1313 prepare_schedule (aTHX_ &ta);
1314 TRANSFER (ta);
1315}
1316
1317static int
1318api_cede (void)
1319{
1320 dTHX;
1321 struct transfer_args ta;
1322
1323 prepare_cede (aTHX_ &ta);
1324
1325 if (ta.prev != ta.next)
1326 {
1327 TRANSFER (ta);
1328 return 1;
1329 }
1330 else
1331 return 0;
1332}
1333
1334static int
1335api_cede_notself (void)
1336{
1337 dTHX;
1338 struct transfer_args ta;
1339
1340 if (prepare_cede_notself (aTHX_ &ta))
1341 {
1342 TRANSFER (ta);
1343 return 1;
1344 }
1345 else
1346 return 0;
1347}
1348
1349static void
1350api_trace (SV *coro_sv, int flags)
1351{
1352 dTHX;
1353 struct coro *coro = SvSTATE (coro_sv);
1354
1355 if (flags & CC_TRACE)
1356 {
1357 if (!coro->cctx)
1358 coro->cctx = cctx_new ();
1359 else if (!(coro->cctx->flags & CC_TRACE))
1360 croak ("cannot enable tracing on coroutine with custom stack");
1361
1362 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1363 }
1364 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1365 {
1366 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1367
1368 if (coro->flags & CF_RUNNING)
1369 PL_runops = RUNOPS_DEFAULT;
1370 else
1371 coro->runops = RUNOPS_DEFAULT;
1372 }
1373}
1374
741MODULE = Coro::State PACKAGE = Coro::State 1375MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 1376
743PROTOTYPES: ENABLE 1377PROTOTYPES: DISABLE
744 1378
745BOOT: 1379BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 1380{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1381#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1382 MUTEX_INIT (&coro_mutex);
1383#endif
1384 BOOT_PAGESIZE;
1385
1386 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1387
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1388 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 1389
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1390 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1391 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1392 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1393 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 1394
759 main_mainstack = PL_mainstack; 1395 main_mainstack = PL_mainstack;
760} 1396 main_top_env = PL_top_env;
761 1397
762Coro::State 1398 while (main_top_env->je_prev)
763_newprocess(args) 1399 main_top_env = main_top_env->je_prev;
764 SV * args 1400
765 PROTOTYPE: $ 1401 coroapi.ver = CORO_API_VERSION;
1402 coroapi.transfer = api_transfer;
1403
1404 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1405}
1406
1407SV *
1408new (char *klass, ...)
766 CODE: 1409 CODE:
767 Coro__State coro; 1410{
1411 struct coro *coro;
1412 HV *hv;
1413 int i;
768 1414
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
770 croak ("Coro::State::_newprocess expects an arrayref");
771
772 New (0, coro, 1, struct coro); 1415 Newz (0, coro, 1, struct coro);
1416 coro->args = newAV ();
1417 coro->flags = CF_NEW;
773 1418
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1419 if (coro_first) coro_first->prev = coro;
775 coro->mainstack = 0; /* actual work is done inside transfer */ 1420 coro->next = coro_first;
776 coro->stack = 0; 1421 coro_first = coro;
777 1422
778 RETVAL = coro; 1423 coro->hv = hv = newHV ();
1424 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1425 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1426
1427 for (i = 1; i < items; i++)
1428 av_push (coro->args, newSVsv (ST (i)));
1429}
779 OUTPUT: 1430 OUTPUT:
780 RETVAL 1431 RETVAL
781 1432
1433# these not obviously related functions are all rolled into the same xs
1434# function to increase chances that they all will call transfer with the same
1435# stack offset
782void 1436void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1437_set_stacklevel (...)
784 Coro::State_or_hashref prev 1438 ALIAS:
785 Coro::State_or_hashref next 1439 Coro::State::transfer = 1
786 int flags 1440 Coro::schedule = 2
787 PROTOTYPE: @ 1441 Coro::cede = 3
1442 Coro::cede_notself = 4
788 CODE: 1443 CODE:
789 transfer (aTHX_ prev, next, flags); 1444{
1445 struct transfer_args ta;
1446
1447 switch (ix)
1448 {
1449 case 0:
1450 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1451 ta.next = 0;
1452 break;
1453
1454 case 1:
1455 if (items != 2)
1456 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1457
1458 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1459 break;
1460
1461 case 2:
1462 prepare_schedule (aTHX_ &ta);
1463 break;
1464
1465 case 3:
1466 prepare_cede (aTHX_ &ta);
1467 break;
1468
1469 case 4:
1470 if (!prepare_cede_notself (aTHX_ &ta))
1471 XSRETURN_EMPTY;
1472
1473 break;
1474 }
1475
1476 BARRIER;
1477 TRANSFER (ta);
1478
1479 if (GIMME_V != G_VOID && ta.next != ta.prev)
1480 XSRETURN_YES;
1481}
1482
1483bool
1484_destroy (SV *coro_sv)
1485 CODE:
1486 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1487 OUTPUT:
1488 RETVAL
790 1489
791void 1490void
792DESTROY(coro) 1491_exit (code)
793 Coro::State coro 1492 int code
794 CODE: 1493 PROTOTYPE: $
1494 CODE:
1495 _exit (code);
795 1496
796 if (coro->mainstack && coro->mainstack != main_mainstack) 1497int
1498cctx_stacksize (int new_stacksize = 0)
1499 CODE:
1500 RETVAL = coro_stacksize;
1501 if (new_stacksize)
1502 coro_stacksize = new_stacksize;
1503 OUTPUT:
1504 RETVAL
1505
1506int
1507cctx_count ()
1508 CODE:
1509 RETVAL = cctx_count;
1510 OUTPUT:
1511 RETVAL
1512
1513int
1514cctx_idle ()
1515 CODE:
1516 RETVAL = cctx_idle;
1517 OUTPUT:
1518 RETVAL
1519
1520void
1521list ()
1522 PPCODE:
1523{
1524 struct coro *coro;
1525 for (coro = coro_first; coro; coro = coro->next)
1526 if (coro->hv)
1527 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1528}
1529
1530void
1531call (Coro::State coro, SV *coderef)
1532 ALIAS:
1533 eval = 1
1534 CODE:
1535{
1536 if (coro->mainstack)
797 { 1537 {
798 struct coro temp; 1538 struct coro temp;
1539 Zero (&temp, 1, struct coro);
799 1540
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1541 if (!(coro->flags & CF_RUNNING))
801 LOAD(aTHX_ coro); 1542 {
1543 save_perl (aTHX_ &temp);
1544 load_perl (aTHX_ coro);
1545 }
802 1546
803 destroy_stacks (aTHX); 1547 {
1548 dSP;
1549 ENTER;
1550 SAVETMPS;
1551 PUSHMARK (SP);
1552 PUTBACK;
1553 if (ix)
1554 eval_sv (coderef, 0);
1555 else
1556 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1557 SPAGAIN;
1558 FREETMPS;
1559 LEAVE;
1560 PUTBACK;
1561 }
804 1562
805 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1563 if (!(coro->flags & CF_RUNNING))
806 1564 {
807 coro->mainstack = 0; 1565 save_perl (aTHX_ coro);
1566 load_perl (aTHX_ &temp);
1567 }
808 } 1568 }
1569}
809 1570
810 deallocate_stack (coro); 1571SV *
811 1572is_ready (Coro::State coro)
812 Safefree (coro); 1573 PROTOTYPE: $
1574 ALIAS:
1575 is_ready = CF_READY
1576 is_running = CF_RUNNING
1577 is_new = CF_NEW
1578 is_destroyed = CF_DESTROYED
1579 CODE:
1580 RETVAL = boolSV (coro->flags & ix);
1581 OUTPUT:
1582 RETVAL
813 1583
814void 1584void
815flush() 1585api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1586
1587SV *
1588has_stack (Coro::State coro)
1589 PROTOTYPE: $
816 CODE: 1590 CODE:
817#ifdef MAY_FLUSH 1591 RETVAL = boolSV (!!coro->cctx);
818 flush_padlist_cache (); 1592 OUTPUT:
819#endif 1593 RETVAL
820 1594
1595int
1596is_traced (Coro::State coro)
1597 PROTOTYPE: $
1598 CODE:
1599 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1600 OUTPUT:
1601 RETVAL
1602
1603IV
1604rss (Coro::State coro)
1605 PROTOTYPE: $
1606 ALIAS:
1607 usecount = 1
1608 CODE:
1609 switch (ix)
1610 {
1611 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1612 case 1: RETVAL = coro->usecount; break;
1613 }
1614 OUTPUT:
1615 RETVAL
1616
1617
821MODULE = Coro::State PACKAGE = Coro::Cont 1618MODULE = Coro::State PACKAGE = Coro
822 1619
823# this is slightly dirty 1620BOOT:
1621{
1622 int i;
1623
1624 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1625 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1626 av_async_pool = get_av ("Coro::async_pool", TRUE);
1627
1628 coro_current = get_sv ("Coro::current", FALSE);
1629 SvREADONLY_on (coro_current);
1630
1631 coro_stash = gv_stashpv ("Coro", TRUE);
1632
1633 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1634 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1635 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1636 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1637 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1638 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1639
1640 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1641 coro_ready[i] = newAV ();
1642
1643 {
1644 SV *sv = perl_get_sv("Coro::API", 1);
1645
1646 coroapi.schedule = api_schedule;
1647 coroapi.cede = api_cede;
1648 coroapi.cede_notself = api_cede_notself;
1649 coroapi.ready = api_ready;
1650 coroapi.is_ready = api_is_ready;
1651 coroapi.nready = &coro_nready;
1652 coroapi.current = coro_current;
1653
1654 GCoroAPI = &coroapi;
1655 sv_setiv (sv, (IV)&coroapi);
1656 SvREADONLY_on (sv);
1657 }
1658}
824 1659
825void 1660void
826yield(...) 1661_set_current (SV *current)
827 PROTOTYPE: @ 1662 PROTOTYPE: $
1663 CODE:
1664 SvREFCNT_dec (SvRV (coro_current));
1665 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1666
1667int
1668prio (Coro::State coro, int newprio = 0)
1669 ALIAS:
1670 nice = 1
828 CODE: 1671 CODE:
829 static SV *returnstk; 1672{
830 SV *sv; 1673 RETVAL = coro->prio;
1674
1675 if (items > 1)
1676 {
1677 if (ix)
1678 newprio = coro->prio - newprio;
1679
1680 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1681 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1682
1683 coro->prio = newprio;
1684 }
1685}
1686 OUTPUT:
1687 RETVAL
1688
1689SV *
1690ready (SV *self)
1691 PROTOTYPE: $
1692 CODE:
1693 RETVAL = boolSV (api_ready (self));
1694 OUTPUT:
1695 RETVAL
1696
1697int
1698nready (...)
1699 PROTOTYPE:
1700 CODE:
1701 RETVAL = coro_nready;
1702 OUTPUT:
1703 RETVAL
1704
1705# for async_pool speedup
1706void
1707_pool_1 (SV *cb)
1708 CODE:
1709{
1710 int i, len;
1711 HV *hv = (HV *)SvRV (coro_current);
831 AV *defav = GvAV (PL_defgv); 1712 AV *defav = GvAV (PL_defgv);
832 struct coro *prev, *next; 1713 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1714 AV *invoke_av;
833 1715
834 if (!returnstk) 1716 if (!invoke)
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1717 croak ("\3terminate\2\n");
836 1718
837 /* set up @_ -- ugly */ 1719 hv_store (hv, "desc", sizeof ("desc") - 1,
838 av_clear (defav); 1720 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1721
1722 invoke_av = (AV *)SvRV (invoke);
1723 len = av_len (invoke_av);
1724
1725 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1726
1727 if (len > 0)
1728 {
839 av_fill (defav, items - 1); 1729 av_fill (defav, len - 1);
840 while (items--) 1730 for (i = 0; i < len; ++i)
841 av_store (defav, items, SvREFCNT_inc (ST(items))); 1731 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1732 }
842 1733
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
844 sv = av_pop ((AV *)SvRV (returnstk));
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
847 SvREFCNT_dec (sv); 1734 SvREFCNT_dec (invoke);
1735}
848 1736
849 transfer(aTHX_ prev, next, 0); 1737void
1738_pool_2 (SV *cb)
1739 CODE:
1740{
1741 struct coro *coro = SvSTATE (coro_current);
850 1742
1743 sv_setsv (cb, &PL_sv_undef);
1744
1745 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1746 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1747 croak ("\3terminate\2\n");
1748
1749 av_clear (GvAV (PL_defgv));
1750 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1751 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1752
1753 coro->prio = 0;
1754
1755 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1756 api_trace (coro_current, 0);
1757
1758 av_push (av_async_pool, newSVsv (coro_current));
1759}
1760
1761
1762MODULE = Coro::State PACKAGE = Coro::AIO
1763
1764SV *
1765_get_state ()
1766 CODE:
1767{
1768 struct io_state *data;
1769
1770 RETVAL = newSV (sizeof (struct io_state));
1771 data = (struct io_state *)SvPVX (RETVAL);
1772 SvCUR_set (RETVAL, sizeof (struct io_state));
1773 SvPOK_only (RETVAL);
1774
1775 data->errorno = errno;
1776 data->laststype = PL_laststype;
1777 data->laststatval = PL_laststatval;
1778 data->statcache = PL_statcache;
1779}
1780 OUTPUT:
1781 RETVAL
1782
1783void
1784_set_state (char *data_)
1785 PROTOTYPE: $
1786 CODE:
1787{
1788 struct io_state *data = (void *)data_;
1789
1790 errno = data->errorno;
1791 PL_laststype = data->laststype;
1792 PL_laststatval = data->laststatval;
1793 PL_statcache = data->statcache;
1794}
1795

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