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Comparing Coro/Coro/State.xs (file contents):
Revision 1.31 by root, Sun Aug 26 16:36:08 2001 UTC vs.
Revision 1.175 by root, Sun Sep 30 13:43:45 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"
6 10
7#include <signal.h> 11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
8 14
9#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
10# include <unistd.h> 16# include <unistd.h>
11# include <sys/mman.h> 17# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 18# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
15# else 21# else
16# undef HAVE_MMAP 22# undef HAVE_MMAP
17# endif 23# endif
18# endif 24# endif
25# include <limits.h>
26# ifndef PAGESIZE
27# define PAGESIZE pagesize
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
29static long pagesize;
30# else
31# define BOOT_PAGESIZE (void)0
19#endif 32# endif
33#else
34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
20 37
21#define MAY_FLUSH /* increases codesize and is rarely used */ 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
22 44
23#define SUB_INIT "Coro::State::initialize" 45/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 46#define MAX_IDLE_CCTX 8
25 47
26/* The next macro should declare a variable stacklevel that contains and approximation 48#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 49 (PERL_REVISION > (a) \
28 * and should be unique. */ 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
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
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
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
29#define dSTACKLEVEL void *stacklevel = &stacklevel 96#define STACKLEVEL ((void *)&stacklevel)
30 97
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
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))
32 109
33#include "CoroAPI.h" 110#include "CoroAPI.h"
34 111
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;
35static struct CoroAPI coroapi; 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 */
36 136
37/* this is actually not only the c stack but also c registers etc... */ 137/* async_pool helper stuff */
138static SV *sv_pool_rss;
139static SV *sv_pool_size;
140static AV *av_async_pool;
141
142static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle;
144
145enum {
146 CC_MAPPED = 0x01,
147 CC_NOREUSE = 0x02, /* throw this away after tracing */
148 CC_TRACE = 0x04,
149 CC_TRACE_SUB = 0x08, /* trace sub calls */
150 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152};
153
154/* this is a structure representing a c-level coroutine */
38typedef struct { 155typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 156 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 157
158 /* the stack */
159 void *sptr;
160 size_t ssize;
161
162 /* cpu state */
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
165 JMPENV *top_env;
43 coro_context cctx; 166 coro_context cctx;
44 167
45 void *sptr; 168#if CORO_USE_VALGRIND
46 long ssize; /* positive == mmap, otherwise malloc */ 169 int valgrind_id;
47} coro_stack; 170#endif
171 unsigned char flags;
172} coro_cctx;
48 173
174enum {
175 CF_RUNNING = 0x0001, /* coroutine is running */
176 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
179};
180
181/* this is a structure representing a perl-level coroutine */
49struct coro { 182struct coro {
50 /* the optional C context */ 183 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 184 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54
55 /* optionally saved, might be zero */
56 AV *defav;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack;
68 SV **stack_sp;
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 185
92 /* data associated with this coroutine (initial args) */ 186 /* data associated with this coroutine (initial args) */
93 AV *args; 187 AV *args;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */
191
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name;
201# include "state.h"
202#undef VAR
203
204 /* statistics */
205 int usecount; /* number of switches to this coro */
206
207 /* coro process data */
208 int prio;
209
210 /* linked list */
211 struct coro *next, *prev;
212 HV *hv; /* the perl hash associated with this coro, if any */
94}; 213};
95 214
96typedef struct coro *Coro__State; 215typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 216typedef struct coro *Coro__State_or_hashref;
98 217
99static AV *main_mainstack; /* used to differentiate between $main and others */ 218/** Coro ********************************************************************/
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 219
105/* mostly copied from op.c:cv_clone2 */ 220#define PRIO_MAX 3
106STATIC AV * 221#define PRIO_HIGH 1
107clone_padlist (AV *protopadlist) 222#define PRIO_NORMAL 0
223#define PRIO_LOW -1
224#define PRIO_IDLE -3
225#define PRIO_MIN -4
226
227/* for Coro.pm */
228static SV *coro_current;
229static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
230static int coro_nready;
231static struct coro *coro_first;
232
233/** lowlevel stuff **********************************************************/
234
235static AV *
236coro_clone_padlist (pTHX_ CV *cv)
108{ 237{
109 AV *av; 238 AV *padlist = CvPADLIST (cv);
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad; 239 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 240
128 newpadlist = newAV (); 241 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 242 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 243#if PERL_VERSION_ATLEAST (5,9,0)
244 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
245#else
246 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
247#endif
248 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
249 --AvFILLp (padlist);
250
251 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131 av_store (newpadlist, 1, (SV *) newpad); 252 av_store (newpadlist, 1, (SV *)newpad);
132 253
133 av = newAV (); /* will be @_ */ 254 return newpadlist;
134 av_extend (av, 0); 255}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 256
138 for (ix = fpad; ix > 0; ix--) 257static void
258free_padlist (pTHX_ AV *padlist)
259{
260 /* may be during global destruction */
261 if (SvREFCNT (padlist))
139 { 262 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 263 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 264 while (i >= 0)
142 { 265 {
143 char *name = SvPVX (namesv); /* XXX */ 266 SV **svp = av_fetch (padlist, i--, FALSE);
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 267 if (svp)
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 } 268 {
148 else
149 { /* our own lexical */
150 SV *sv; 269 SV *sv;
151 if (*name == '&') 270 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152 sv = SvREFCNT_inc (ppad[ix]); 271 SvREFCNT_dec (sv);
153 else if (*name == '@') 272
154 sv = (SV *) newAV (); 273 SvREFCNT_dec (*svp);
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 } 274 }
163 } 275 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 276
277 SvREFCNT_dec ((SV*)padlist);
278 }
279}
280
281static int
282coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
283{
284 AV *padlist;
285 AV *av = (AV *)mg->mg_obj;
286
287 /* casting is fun. */
288 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
289 free_padlist (aTHX_ padlist);
290
291 SvREFCNT_dec (av);
292
293 return 0;
294}
295
296#define PERL_MAGIC_coro PERL_MAGIC_ext
297
298static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
299
300#define CORO_MAGIC(cv) \
301 SvMAGIC (cv) \
302 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
303 ? SvMAGIC (cv) \
304 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
305 : 0
306
307static struct coro *
308SvSTATE_ (pTHX_ SV *coro)
309{
310 HV *stash;
311 MAGIC *mg;
312
313 if (SvROK (coro))
314 coro = SvRV (coro);
315
316 if (SvTYPE (coro) != SVt_PVHV)
317 croak ("Coro::State object required");
318
319 stash = SvSTASH (coro);
320 if (stash != coro_stash && stash != coro_state_stash)
321 {
322 /* very slow, but rare, check */
323 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
324 croak ("Coro::State object required");
325 }
326
327 mg = CORO_MAGIC (coro);
328 return (struct coro *)mg->mg_ptr;
329}
330
331#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
332
333/* the next two functions merely cache the padlists */
334static void
335get_padlist (pTHX_ CV *cv)
336{
337 MAGIC *mg = CORO_MAGIC (cv);
338 AV *av;
339
340 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
341 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
342 else
343 {
344#if CORO_PREFER_PERL_FUNCTIONS
345 /* this is probably cleaner, but also slower? */
346 CV *cp = Perl_cv_clone (cv);
347 CvPADLIST (cv) = CvPADLIST (cp);
348 CvPADLIST (cp) = 0;
349 SvREFCNT_dec (cp);
350#else
351 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
352#endif
353 }
354}
355
356static void
357put_padlist (pTHX_ CV *cv)
358{
359 MAGIC *mg = CORO_MAGIC (cv);
360 AV *av;
361
362 if (!mg)
363 {
364 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
365 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
366 mg->mg_virtual = &vtbl_coro;
367 mg->mg_obj = (SV *)newAV ();
368 }
369
370 av = (AV *)mg->mg_obj;
371
372 if (AvFILLp (av) >= AvMAX (av))
373 av_extend (av, AvMAX (av) + 1);
374
375 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
376}
377
378/** load & save, init *******************************************************/
379
380#define SB do {
381#define SE } while (0)
382
383#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
384
385static void
386load_perl (pTHX_ Coro__State c)
387{
388#define VAR(name,type) PL_ ## name = c->name;
389# include "state.h"
390#undef VAR
391
392 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
393 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
394 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
395 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
396
397 if (c->irssv)
398 {
399 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
165 { 400 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]); 401 SvREFCNT_dec (c->irssv);
402 c->irssv = 0;
167 } 403 }
168 else 404 else
169 { 405 {
170 SV *sv = NEWSV (0, 0); 406 REPLACE_SV (PL_rs, c->irssv);
171 SvPADTMP_on (sv); 407 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
172 npad[ix] = sv; 408 sv_setsv (c->irssv_sv, PL_rs);
173 } 409 }
174 } 410 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316 411
317 { 412 {
318 dSP; 413 dSP;
319 CV *cv; 414 CV *cv;
320 415
321 /* now do the ugly restore mess */ 416 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 417 while ((cv = (CV *)POPs))
323 { 418 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 419 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 420 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 421 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 422 }
337 423
338 PUTBACK; 424 PUTBACK;
339 } 425 }
340} 426}
341 427
342static void 428static void
343save_state(pTHX_ Coro__State c, int flags) 429save_perl (pTHX_ Coro__State c)
344{ 430{
345 { 431 {
346 dSP; 432 dSP;
347 I32 cxix = cxstack_ix; 433 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 434 PERL_CONTEXT *ccstk = cxstack;
… …
351 /* 437 /*
352 * the worst thing you can imagine happens first - we have to save 438 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 439 * (and reinitialize) all cv's in the whole callchain :(
354 */ 440 */
355 441
356 PUSHs (Nullsv); 442 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 443 /* this loop was inspired by pp_caller */
358 for (;;) 444 for (;;)
359 { 445 {
360 while (cxix >= 0) 446 while (cxix >= 0)
361 { 447 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 448 PERL_CONTEXT *cx = &ccstk[cxix--];
363 449
364 if (CxTYPE(cx) == CXt_SUB) 450 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
365 { 451 {
366 CV *cv = cx->blk_sub.cv; 452 CV *cv = cx->blk_sub.cv;
453
367 if (CvDEPTH(cv)) 454 if (CvDEPTH (cv))
368 { 455 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 456 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 457 PUSHs ((SV *)CvPADLIST (cv));
458 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 459 PUSHs ((SV *)cv);
385 460
386 get_padlist (cv); /* this is a monster */ 461 CvDEPTH (cv) = 0;
462 get_padlist (aTHX_ cv);
387 } 463 }
388 } 464 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 465 }
396 466
397 if (top_si->si_type == PERLSI_MAIN) 467 if (top_si->si_type == PERLSI_MAIN)
398 break; 468 break;
399 469
400 top_si = top_si->si_prev; 470 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack; 471 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix; 472 cxix = top_si->si_cxix;
403 } 473 }
404 474
405 PUTBACK; 475 PUTBACK;
406 } 476 }
407 477
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 478 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 479 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 480 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
481 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
482 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
411 483
412 c->dowarn = PL_dowarn; 484#define VAR(name,type)c->name = PL_ ## name;
413 c->in_eval = PL_in_eval; 485# include "state.h"
414 486#undef VAR
415 c->curstackinfo = PL_curstackinfo;
416 c->curstack = PL_curstack;
417 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp;
419 c->op = PL_op;
420 c->curpad = PL_curpad;
421 c->stack_base = PL_stack_base;
422 c->stack_max = PL_stack_max;
423 c->tmps_stack = PL_tmps_stack;
424 c->tmps_floor = PL_tmps_floor;
425 c->tmps_ix = PL_tmps_ix;
426 c->tmps_max = PL_tmps_max;
427 c->markstack = PL_markstack;
428 c->markstack_ptr = PL_markstack_ptr;
429 c->markstack_max = PL_markstack_max;
430 c->scopestack = PL_scopestack;
431 c->scopestack_ix = PL_scopestack_ix;
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441} 487}
442 488
443/* 489/*
444 * allocate various perl stacks. This is an exact copy 490 * allocate various perl stacks. This is an exact copy
445 * of perl.c:init_stacks, except that it uses less memory 491 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need 492 * on the (sometimes correct) assumption that coroutines do
447 * a lot of stackspace. 493 * not usually need a lot of stackspace.
448 */ 494 */
449STATIC void 495#if CORO_PREFER_PERL_FUNCTIONS
496# define coro_init_stacks init_stacks
497#else
498static void
450coro_init_stacks (pTHX) 499coro_init_stacks (pTHX)
451{ 500{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 501 PL_curstackinfo = new_stackinfo(64, 6);
453 PL_curstackinfo->si_type = PERLSI_MAIN; 502 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack; 503 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456 505
457 PL_stack_base = AvARRAY(PL_curstack); 506 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base; 507 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460 509
461 New(50,PL_tmps_stack,96,SV*); 510 New(50,PL_tmps_stack,64,SV*);
462 PL_tmps_floor = -1; 511 PL_tmps_floor = -1;
463 PL_tmps_ix = -1; 512 PL_tmps_ix = -1;
464 PL_tmps_max = 96; 513 PL_tmps_max = 64;
465 514
466 New(54,PL_markstack,16,I32); 515 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack; 516 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16; 517 PL_markstack_max = PL_markstack + 16;
469 518
519#ifdef SET_MARK_OFFSET
470 SET_MARK_OFFSET; 520 SET_MARK_OFFSET;
521#endif
471 522
472 New(54,PL_scopestack,16,I32); 523 New(54,PL_scopestack,16,I32);
473 PL_scopestack_ix = 0; 524 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 525 PL_scopestack_max = 16;
475 526
476 New(54,PL_savestack,96,ANY); 527 New(54,PL_savestack,64,ANY);
477 PL_savestack_ix = 0; 528 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 529 PL_savestack_max = 64;
479 530
531#if !PERL_VERSION_ATLEAST (5,9,0)
480 New(54,PL_retstack,8,OP*); 532 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 533 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 534 PL_retstack_max = 4;
535#endif
483} 536}
537#endif
484 538
485/* 539/*
486 * destroy the stacks, the callchain etc... 540 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */ 541 */
489STATIC void 542static void
490destroy_stacks(pTHX) 543coro_destroy_stacks (pTHX)
491{ 544{
492 int destruct = PL_main_cv != Nullcv; 545 if (!IN_DESTRUCT)
493
494 if (destruct)
495 { 546 {
496 /* is this ugly, I ask? */ 547 /* restore all saved variables and stuff */
497 while (PL_scopestack_ix) 548 LEAVE_SCOPE (0);
498 LEAVE; 549 assert (PL_tmps_floor == -1);
499 550
500 /* sure it is, but more important: is it correct?? :/ */ 551 /* free all temporaries */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS; 552 FREETMPS;
553 assert (PL_tmps_ix == -1);
554
555 /* unwind all extra stacks */
556 POPSTACK_TO (PL_mainstack);
557
558 /* unwind main stack */
559 dounwind (-1);
503 } 560 }
504 561
505 while (PL_curstackinfo->si_next) 562 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 563 PL_curstackinfo = PL_curstackinfo->si_next;
507 564
508 while (PL_curstackinfo) 565 while (PL_curstackinfo)
509 { 566 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 567 PERL_SI *p = PL_curstackinfo->si_prev;
511 568
512 { 569 if (!IN_DESTRUCT)
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (destruct)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 570 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 571
524 Safefree(PL_curstackinfo->si_cxstack); 572 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 573 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 574 PL_curstackinfo = p;
527 } 575 }
528 576
529 Safefree(PL_tmps_stack); 577 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 578 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 579 Safefree (PL_scopestack);
532 Safefree(PL_savestack); 580 Safefree (PL_savestack);
581#if !PERL_VERSION_ATLEAST (5,9,0)
533 Safefree(PL_retstack); 582 Safefree (PL_retstack);
583#endif
534} 584}
585
586static size_t
587coro_rss (pTHX_ struct coro *coro)
588{
589 size_t rss = sizeof (coro);
590
591 if (coro->mainstack)
592 {
593 if (coro->flags & CF_RUNNING)
594 {
595 #define VAR(name,type)coro->name = PL_ ## name;
596 # include "state.h"
597 #undef VAR
598 }
599
600 rss += sizeof (coro->curstackinfo);
601 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
602 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
603 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
604 rss += coro->tmps_max * sizeof (SV *);
605 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
606 rss += coro->scopestack_max * sizeof (I32);
607 rss += coro->savestack_max * sizeof (ANY);
608
609#if !PERL_VERSION_ATLEAST (5,9,0)
610 rss += coro->retstack_max * sizeof (OP *);
611#endif
612 }
613
614 return rss;
615}
616
617/** coroutine stack handling ************************************************/
535 618
536static void 619static void
537allocate_stack (Coro__State ctx, int alloc) 620setup_coro (pTHX_ struct coro *coro)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{ 621{
593 /* 622 /*
594 * emulate part of the perl startup here. 623 * emulate part of the perl startup here.
595 */ 624 */
625 coro_init_stacks (aTHX);
626
627 PL_runops = RUNOPS_DEFAULT;
628 PL_curcop = &PL_compiling;
629 PL_in_eval = EVAL_NULL;
630 PL_comppad = 0;
631 PL_curpm = 0;
632 PL_localizing = 0;
633 PL_dirty = 0;
634 PL_restartop = 0;
635
636 {
637 dSP;
638 LOGOP myop;
639
640 SvREFCNT_dec (GvAV (PL_defgv));
641 GvAV (PL_defgv) = coro->args; coro->args = 0;
642
643 Zero (&myop, 1, LOGOP);
644 myop.op_next = Nullop;
645 myop.op_flags = OPf_WANT_VOID;
646
647 PUSHMARK (SP);
648 XPUSHs (av_shift (GvAV (PL_defgv)));
649 PUTBACK;
650 PL_op = (OP *)&myop;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653 }
654
655 ENTER; /* necessary e.g. for dounwind */
656}
657
658static void
659free_coro_mortal (pTHX)
660{
661 if (coro_mortal)
662 {
663 SvREFCNT_dec (coro_mortal);
664 coro_mortal = 0;
665 }
666}
667
668static int
669runops_trace (pTHX)
670{
671 COP *oldcop = 0;
672 int oldcxix = -2;
673 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
674 coro_cctx *cctx = coro->cctx;
675
676 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
677 {
678 PERL_ASYNC_CHECK ();
679
680 if (cctx->flags & CC_TRACE_ALL)
681 {
682 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
683 {
684 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
685 SV **bot, **top;
686 AV *av = newAV (); /* return values */
687 SV **cb;
688 dSP;
689
690 GV *gv = CvGV (cx->blk_sub.cv);
691 SV *fullname = sv_2mortal (newSV (0));
692 if (isGV (gv))
693 gv_efullname3 (fullname, gv, 0);
694
695 bot = PL_stack_base + cx->blk_oldsp + 1;
696 top = cx->blk_gimme == G_ARRAY ? SP + 1
697 : cx->blk_gimme == G_SCALAR ? bot + 1
698 : bot;
699
700 while (bot < top)
701 av_push (av, SvREFCNT_inc (*bot++));
702
703 PL_runops = RUNOPS_DEFAULT;
704 ENTER;
705 SAVETMPS;
706 EXTEND (SP, 3);
707 PUSHMARK (SP);
708 PUSHs (&PL_sv_no);
709 PUSHs (fullname);
710 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
711 PUTBACK;
712 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
713 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
714 SPAGAIN;
715 FREETMPS;
716 LEAVE;
717 PL_runops = runops_trace;
718 }
719
720 if (oldcop != PL_curcop)
721 {
722 oldcop = PL_curcop;
723
724 if (PL_curcop != &PL_compiling)
725 {
726 SV **cb;
727
728 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
729 {
730 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
731
732 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
733 {
734 runops_proc_t old_runops = PL_runops;
735 dSP;
736 GV *gv = CvGV (cx->blk_sub.cv);
737 SV *fullname = sv_2mortal (newSV (0));
738
739 if (isGV (gv))
740 gv_efullname3 (fullname, gv, 0);
741
742 PL_runops = RUNOPS_DEFAULT;
743 ENTER;
744 SAVETMPS;
745 EXTEND (SP, 3);
746 PUSHMARK (SP);
747 PUSHs (&PL_sv_yes);
748 PUSHs (fullname);
749 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
750 PUTBACK;
751 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
752 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
753 SPAGAIN;
754 FREETMPS;
755 LEAVE;
756 PL_runops = runops_trace;
757 }
758
759 oldcxix = cxstack_ix;
760 }
761
762 if (cctx->flags & CC_TRACE_LINE)
763 {
764 dSP;
765
766 PL_runops = RUNOPS_DEFAULT;
767 ENTER;
768 SAVETMPS;
769 EXTEND (SP, 3);
770 PL_runops = RUNOPS_DEFAULT;
771 PUSHMARK (SP);
772 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
773 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
774 PUTBACK;
775 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
776 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
777 SPAGAIN;
778 FREETMPS;
779 LEAVE;
780 PL_runops = runops_trace;
781 }
782 }
783 }
784 }
785 }
786
787 TAINT_NOT;
788 return 0;
789}
790
791/* inject a fake call to Coro::State::_cctx_init into the execution */
792/* _cctx_init should be careful, as it could be called at almost any time */
793/* during execution of a perl program */
794static void NOINLINE
795prepare_cctx (pTHX_ coro_cctx *cctx)
796{
596 dSP; 797 dSP;
597 Coro__State ctx = (Coro__State)arg; 798 LOGOP myop;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 799
600 coro_init_stacks (aTHX); 800 PL_top_env = &PL_start_env;
601 /*PL_curcop = 0;*/
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 801
802 if (cctx->flags & CC_TRACE)
803 PL_runops = runops_trace;
804
805 Zero (&myop, 1, LOGOP);
806 myop.op_next = PL_op;
807 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
808
809 PUSHMARK (SP);
810 EXTEND (SP, 2);
811 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
812 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
813 PUTBACK;
814 PL_op = (OP *)&myop;
815 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
606 SPAGAIN; 816 SPAGAIN;
817}
607 818
608 if (ctx->stack) 819/*
609 { 820 * this is a _very_ stripped down perl interpreter ;)
610 ctx->cursp = 0; 821 */
822static void
823coro_run (void *arg)
824{
825 dTHX;
611 826
612 PUSHMARK(SP); 827 /* coro_run is the alternative tail of transfer(), so unlock here. */
613 PUTBACK; 828 UNLOCK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615 829
616 if (SvTRUE (ERRSV)) 830 /* we now skip the entersub that lead to transfer() */
617 croak (NULL); 831 PL_op = PL_op->op_next;
618 else 832
619 croak ("FATAL: CCTXT coroutine returned!"); 833 /* inject a fake subroutine call to cctx_init */
834 prepare_cctx (aTHX_ (coro_cctx *)arg);
835
836 /* somebody or something will hit me for both perl_run and PL_restartop */
837 PL_restartop = PL_op;
838 perl_run (PL_curinterp);
839
840 /*
841 * If perl-run returns we assume exit() was being called or the coro
842 * fell off the end, which seems to be the only valid (non-bug)
843 * reason for perl_run to return. We try to exit by jumping to the
844 * bootstrap-time "top" top_env, as we cannot restore the "main"
845 * coroutine as Coro has no such concept
846 */
847 PL_top_env = main_top_env;
848 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
849}
850
851static coro_cctx *
852cctx_new ()
853{
854 coro_cctx *cctx;
855 void *stack_start;
856 size_t stack_size;
857
858 ++cctx_count;
859
860 Newz (0, cctx, 1, coro_cctx);
861
862#if HAVE_MMAP
863
864 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
865 /* mmap supposedly does allocate-on-write for us */
866 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
867
868 if (cctx->sptr != (void *)-1)
869 {
870# if CORO_STACKGUARD
871 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
872# endif
873 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
874 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
875 cctx->flags |= CC_MAPPED;
620 } 876 }
621 else 877 else
622 { 878#endif
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 } 879 {
880 cctx->ssize = coro_stacksize * (long)sizeof (long);
881 New (0, cctx->sptr, coro_stacksize, long);
882
883 if (!cctx->sptr)
884 {
885 perror ("FATAL: unable to allocate stack for coroutine");
886 _exit (EXIT_FAILURE);
887 }
888
889 stack_start = cctx->sptr;
890 stack_size = cctx->ssize;
891 }
892
893 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
894 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
895
896 return cctx;
646} 897}
647 898
648static void 899static void
649continue_coro (void *arg) 900cctx_destroy (coro_cctx *cctx)
650{ 901{
651 /* 902 if (!cctx)
652 * this is a _very_ stripped down perl interpreter ;) 903 return;
653 */
654 Coro__State ctx = (Coro__State)arg;
655 904
656 /*FIXME*//* must set up top_env here */ 905 --cctx_count;
657 ctx->cursp = 0;
658 PL_op = PL_op->op_next;
659 CALLRUNOPS(aTHX);
660 906
661 abort (); 907#if CORO_USE_VALGRIND
662} 908 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
909#endif
663 910
664STATIC void 911#if HAVE_MMAP
912 if (cctx->flags & CC_MAPPED)
913 munmap (cctx->sptr, cctx->ssize);
914 else
915#endif
916 Safefree (cctx->sptr);
917
918 Safefree (cctx);
919}
920
921static coro_cctx *
922cctx_get (pTHX)
923{
924 while (cctx_first)
925 {
926 coro_cctx *cctx = cctx_first;
927 cctx_first = cctx->next;
928 --cctx_idle;
929
930 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
931 return cctx;
932
933 cctx_destroy (cctx);
934 }
935
936 return cctx_new ();
937}
938
939static void
940cctx_put (coro_cctx *cctx)
941{
942 /* free another cctx if overlimit */
943 if (cctx_idle >= MAX_IDLE_CCTX)
944 {
945 coro_cctx *first = cctx_first;
946 cctx_first = first->next;
947 --cctx_idle;
948
949 cctx_destroy (first);
950 }
951
952 ++cctx_idle;
953 cctx->next = cctx_first;
954 cctx_first = cctx;
955}
956
957/** coroutine switching *****************************************************/
958
959static void NOINLINE
960transfer_check (pTHX_ struct coro *prev, struct coro *next)
961{
962 if (prev != next)
963 {
964 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
965 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
966
967 if (next->flags & CF_RUNNING)
968 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
969
970 if (next->flags & CF_DESTROYED)
971 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
972
973 if (PL_lex_state != LEX_NOTPARSING)
974 croak ("Coro::State::transfer called while parsing, but this is not supported");
975 }
976}
977
978/* always use the TRANSFER macro */
979static void NOINLINE
665transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 980transfer (pTHX_ struct coro *prev, struct coro *next)
666{ 981{
667 dSTACKLEVEL; 982 dSTACKLEVEL;
668 static struct coro *xnext;
669 983
984 /* sometimes transfer is only called to set idle_sp */
985 if (!next)
986 {
987 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
988 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
989 }
670 if (prev != next) 990 else if (prev != next)
671 { 991 {
672 xnext = next; 992 coro_cctx *prev__cctx;
673 993
674 if (next->mainstack) 994 if (prev->flags & CF_NEW)
675 { 995 {
676 SAVE (prev, flags); 996 /* create a new empty context */
677 LOAD (next); 997 Newz (0, prev->cctx, 1, coro_cctx);
678 998 prev->flags &= ~CF_NEW;
679 /* mark this state as in-use */ 999 prev->flags |= CF_RUNNING;
680 next->mainstack = 0;
681 next->tmps_ix = -2;
682
683 /* stacklevel changed? if yes, grab the stack for us! */
684 if (flags & TRANSFER_SAVE_CCTXT)
685 {
686 if (!prev->stack)
687 allocate_stack (prev, 0);
688 else if (prev->cursp != stacklevel
689 && prev->stack->usecnt > 1)
690 {
691 prev->gencnt = ++prev->stack->gencnt;
692 prev->stack->usecnt = 1;
693 }
694
695 /* has our stack been invalidated? */
696 if (next->stack && next->stack->gencnt != next->gencnt)
697 {
698 deallocate_stack (next);
699 allocate_stack (next, 1);
700 coro_create (&(next->stack->cctx),
701 continue_coro, (void *)next,
702 next->stack->sptr, labs (next->stack->ssize));
703 }
704
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706 /* don't add any code here */
707 }
708
709 } 1000 }
710 else if (next->tmps_ix == -2) 1001
711 croak ("tried to transfer to running coroutine"); 1002 prev->flags &= ~CF_RUNNING;
1003 next->flags |= CF_RUNNING;
1004
1005 LOCK;
1006
1007 if (next->flags & CF_NEW)
1008 {
1009 /* need to start coroutine */
1010 next->flags &= ~CF_NEW;
1011 /* first get rid of the old state */
1012 save_perl (aTHX_ prev);
1013 /* setup coroutine call */
1014 setup_coro (aTHX_ next);
1015 }
712 else 1016 else
713 { 1017 {
714 SAVE (prev, -1); /* first get rid of the old state */ 1018 /* coroutine already started */
715 1019 save_perl (aTHX_ prev);
716 if (flags & TRANSFER_SAVE_CCTXT) 1020 load_perl (aTHX_ next);
717 {
718 if (!prev->stack)
719 allocate_stack (prev, 0);
720
721 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
722 {
723 setup_coro (next);
724
725 prev->stack->refcnt++;
726 prev->stack->usecnt++;
727 next->stack = prev->stack;
728 next->gencnt = prev->gencnt;
729 }
730 else
731 {
732 allocate_stack (next, 1);
733 coro_create (&(next->stack->cctx),
734 setup_coro, (void *)next,
735 next->stack->sptr, labs (next->stack->ssize));
736 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
737 /* don't add any code here */
738 }
739 }
740 else
741 setup_coro (next);
742 } 1021 }
743 }
744 1022
745 /* 1023 prev__cctx = prev->cctx;
746 * xnext is now either prev or next, depending on wether
747 * we switched the c stack or not. that's why i use a global
748 * variable, that should become thread-specific at one point.
749 */
750 xnext->cursp = stacklevel;
751}
752 1024
753static struct coro * 1025 /* possibly "free" the cctx */
754sv_to_coro (SV *arg, const char *funcname, const char *varname) 1026 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
755{ 1027 {
756 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1028 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1029 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1030
1031 prev->cctx = 0;
1032
1033 cctx_put (prev__cctx);
1034 }
1035
1036 ++next->usecount;
1037
1038 if (!next->cctx)
1039 next->cctx = cctx_get (aTHX);
1040
1041 if (prev__cctx != next->cctx)
1042 {
1043 prev__cctx->top_env = PL_top_env;
1044 PL_top_env = next->cctx->top_env;
1045 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1046 }
1047
1048 free_coro_mortal (aTHX);
1049 UNLOCK;
757 { 1050 }
758 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1051}
759 1052
760 if (!he) 1053struct transfer_args
761 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1054{
1055 struct coro *prev, *next;
1056};
762 1057
763 arg = HeVAL(he); 1058#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1059#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1060
1061/** high level stuff ********************************************************/
1062
1063static int
1064coro_state_destroy (pTHX_ struct coro *coro)
1065{
1066 if (coro->flags & CF_DESTROYED)
1067 return 0;
1068
1069 coro->flags |= CF_DESTROYED;
1070
1071 if (coro->flags & CF_READY)
764 } 1072 {
1073 /* reduce nready, as destroying a ready coro effectively unreadies it */
1074 /* alternative: look through all ready queues and remove the coro */
1075 LOCK;
1076 --coro_nready;
1077 UNLOCK;
765 1078 }
766 /* must also be changed inside Coro::Cont::yield */ 1079 else
767 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 1080 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768 return (struct coro *) SvIV((SV*)SvRV(arg));
769 1081
770 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 1082 if (coro->mainstack && coro->mainstack != main_mainstack)
771 /*NORETURN*/ 1083 {
1084 struct coro temp;
1085
1086 assert (!(coro->flags & CF_RUNNING));
1087
1088 Zero (&temp, 1, struct coro);
1089 temp.save = CORO_SAVE_ALL;
1090
1091 if (coro->flags & CF_RUNNING)
1092 croak ("FATAL: tried to destroy currently running coroutine");
1093
1094 save_perl (aTHX_ &temp);
1095 load_perl (aTHX_ coro);
1096
1097 coro_destroy_stacks (aTHX);
1098
1099 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1100
1101 coro->mainstack = 0;
1102 }
1103
1104 cctx_destroy (coro->cctx);
1105 SvREFCNT_dec (coro->args);
1106
1107 if (coro->next) coro->next->prev = coro->prev;
1108 if (coro->prev) coro->prev->next = coro->next;
1109 if (coro == coro_first) coro_first = coro->next;
1110
1111 return 1;
772} 1112}
1113
1114static int
1115coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1116{
1117 struct coro *coro = (struct coro *)mg->mg_ptr;
1118 mg->mg_ptr = 0;
1119
1120 coro->hv = 0;
1121
1122 if (--coro->refcnt < 0)
1123 {
1124 coro_state_destroy (aTHX_ coro);
1125 Safefree (coro);
1126 }
1127
1128 return 0;
1129}
1130
1131static int
1132coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1133{
1134 struct coro *coro = (struct coro *)mg->mg_ptr;
1135
1136 ++coro->refcnt;
1137
1138 return 0;
1139}
1140
1141static MGVTBL coro_state_vtbl = {
1142 0, 0, 0, 0,
1143 coro_state_free,
1144 0,
1145#ifdef MGf_DUP
1146 coro_state_dup,
1147#else
1148# define MGf_DUP 0
1149#endif
1150};
773 1151
774static void 1152static void
1153prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1154{
1155 ta->prev = SvSTATE (prev_sv);
1156 ta->next = SvSTATE (next_sv);
1157 TRANSFER_CHECK (*ta);
1158}
1159
1160static void
775api_transfer(pTHX_ SV *prev, SV *next, int flags) 1161api_transfer (SV *prev_sv, SV *next_sv)
776{ 1162{
777 transfer(aTHX_ 1163 dTHX;
778 sv_to_coro (prev, "Coro::transfer", "prev"), 1164 struct transfer_args ta;
779 sv_to_coro (next, "Coro::transfer", "next"), 1165
780 flags); 1166 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1167 TRANSFER (ta);
1168}
1169
1170static int
1171api_save (SV *coro_sv, int new_save)
1172{
1173 dTHX;
1174 struct coro *coro = SvSTATE (coro_sv);
1175 int old_save = coro->save;
1176
1177 if (new_save >= 0)
1178 coro->save = new_save;
1179
1180 return old_save;
781} 1181}
782 1182
783/** Coro ********************************************************************/ 1183/** Coro ********************************************************************/
784 1184
785#define PRIO_MAX 3
786#define PRIO_HIGH 1
787#define PRIO_NORMAL 0
788#define PRIO_LOW -1
789#define PRIO_IDLE -3
790#define PRIO_MIN -4
791
792/* for Coro.pm */
793static GV *coro_current, *coro_idle;
794static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
795static int coro_nready;
796
797static void 1185static void
798coro_enq (SV *sv) 1186coro_enq (pTHX_ SV *coro_sv)
799{ 1187{
800 if (SvROK (sv)) 1188 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
801 {
802 SV *hv = SvRV (sv);
803 if (SvTYPE (hv) == SVt_PVHV)
804 {
805 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
806 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808 prio = prio > PRIO_MAX ? PRIO_MAX
809 : prio < PRIO_MIN ? PRIO_MIN
810 : prio;
811
812 av_push (coro_ready [prio - PRIO_MIN], sv);
813 coro_nready++;
814
815 return;
816 }
817 }
818
819 croak ("Coro::ready tried to enqueue something that is not a coroutine");
820} 1189}
821 1190
822static SV * 1191static SV *
823coro_deq (int min_prio) 1192coro_deq (pTHX_ int min_prio)
824{ 1193{
825 int prio = PRIO_MAX - PRIO_MIN; 1194 int prio = PRIO_MAX - PRIO_MIN;
826 1195
827 min_prio -= PRIO_MIN; 1196 min_prio -= PRIO_MIN;
828 if (min_prio < 0) 1197 if (min_prio < 0)
829 min_prio = 0; 1198 min_prio = 0;
830 1199
831 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1200 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
832 if (av_len (coro_ready[prio]) >= 0) 1201 if (AvFILLp (coro_ready [prio]) >= 0)
833 {
834 coro_nready--;
835 return av_shift (coro_ready[prio]); 1202 return av_shift (coro_ready [prio]);
836 }
837 1203
838 return 0; 1204 return 0;
839} 1205}
840 1206
1207static int
1208api_ready (SV *coro_sv)
1209{
1210 dTHX;
1211 struct coro *coro;
1212
1213 if (SvROK (coro_sv))
1214 coro_sv = SvRV (coro_sv);
1215
1216 coro = SvSTATE (coro_sv);
1217
1218 if (coro->flags & CF_READY)
1219 return 0;
1220
1221 coro->flags |= CF_READY;
1222
1223 LOCK;
1224 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1225 ++coro_nready;
1226 UNLOCK;
1227
1228 return 1;
1229}
1230
1231static int
1232api_is_ready (SV *coro_sv)
1233{
1234 dTHX;
1235 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1236}
1237
841static void 1238static void
842api_ready (SV *coro) 1239prepare_schedule (pTHX_ struct transfer_args *ta)
843{ 1240{
844 coro_enq (SvREFCNT_inc (coro)); 1241 SV *prev_sv, *next_sv;
1242
1243 for (;;)
1244 {
1245 LOCK;
1246 next_sv = coro_deq (aTHX_ PRIO_MIN);
1247
1248 /* nothing to schedule: call the idle handler */
1249 if (!next_sv)
1250 {
1251 dSP;
1252 UNLOCK;
1253
1254 ENTER;
1255 SAVETMPS;
1256
1257 PUSHMARK (SP);
1258 PUTBACK;
1259 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1260
1261 FREETMPS;
1262 LEAVE;
1263 continue;
1264 }
1265
1266 ta->next = SvSTATE (next_sv);
1267
1268 /* cannot transfer to destroyed coros, skip and look for next */
1269 if (ta->next->flags & CF_DESTROYED)
1270 {
1271 UNLOCK;
1272 SvREFCNT_dec (next_sv);
1273 /* coro_nready is already taken care of by destroy */
1274 continue;
1275 }
1276
1277 --coro_nready;
1278 UNLOCK;
1279 break;
1280 }
1281
1282 /* free this only after the transfer */
1283 prev_sv = SvRV (coro_current);
1284 ta->prev = SvSTATE (prev_sv);
1285 TRANSFER_CHECK (*ta);
1286 assert (ta->next->flags & CF_READY);
1287 ta->next->flags &= ~CF_READY;
1288 SvRV_set (coro_current, next_sv);
1289
1290 LOCK;
1291 free_coro_mortal (aTHX);
1292 coro_mortal = prev_sv;
1293 UNLOCK;
845} 1294}
846 1295
847static void 1296static void
848api_schedule (int cede) 1297prepare_cede (pTHX_ struct transfer_args *ta)
849{ 1298{
850 SV *prev, *next; 1299 api_ready (coro_current);
1300 prepare_schedule (aTHX_ ta);
1301}
851 1302
1303static int
1304prepare_cede_notself (pTHX_ struct transfer_args *ta)
1305{
1306 if (coro_nready)
1307 {
852 prev = GvSV (coro_current); 1308 SV *prev = SvRV (coro_current);
853 1309 prepare_schedule (aTHX_ ta);
854 if (cede) 1310 api_ready (prev);
855 coro_enq (SvREFCNT_inc (prev)); 1311 return 1;
856 1312 }
857 next = coro_deq (PRIO_MIN); 1313 else
858 1314 return 0;
859 if (!next)
860 next = SvREFCNT_inc (GvSV (coro_idle));
861
862 GvSV (coro_current) = SvREFCNT_inc (next);
863 transfer (aTHX_
864 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
865 sv_to_coro (next, "Coro::schedule", "next coroutine"),
866 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
867 SvREFCNT_dec (next);
868 SvREFCNT_dec (prev);
869} 1315}
870 1316
1317static void
1318api_schedule (void)
1319{
1320 dTHX;
1321 struct transfer_args ta;
1322
1323 prepare_schedule (aTHX_ &ta);
1324 TRANSFER (ta);
1325}
1326
1327static int
1328api_cede (void)
1329{
1330 dTHX;
1331 struct transfer_args ta;
1332
1333 prepare_cede (aTHX_ &ta);
1334
1335 if (ta.prev != ta.next)
1336 {
1337 TRANSFER (ta);
1338 return 1;
1339 }
1340 else
1341 return 0;
1342}
1343
1344static int
1345api_cede_notself (void)
1346{
1347 dTHX;
1348 struct transfer_args ta;
1349
1350 if (prepare_cede_notself (aTHX_ &ta))
1351 {
1352 TRANSFER (ta);
1353 return 1;
1354 }
1355 else
1356 return 0;
1357}
1358
1359static void
1360api_trace (SV *coro_sv, int flags)
1361{
1362 dTHX;
1363 struct coro *coro = SvSTATE (coro_sv);
1364
1365 if (flags & CC_TRACE)
1366 {
1367 if (!coro->cctx)
1368 coro->cctx = cctx_new ();
1369 else if (!(coro->cctx->flags & CC_TRACE))
1370 croak ("cannot enable tracing on coroutine with custom stack");
1371
1372 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1373 }
1374 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1375 {
1376 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1377
1378 if (coro->flags & CF_RUNNING)
1379 PL_runops = RUNOPS_DEFAULT;
1380 else
1381 coro->runops = RUNOPS_DEFAULT;
1382 }
1383}
1384
871MODULE = Coro::State PACKAGE = Coro::State 1385MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
872 1386
873PROTOTYPES: ENABLE 1387PROTOTYPES: DISABLE
874 1388
875BOOT: 1389BOOT:
876{ /* {} necessary for stoopid perl-5.6.x */ 1390{
877 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1391#ifdef USE_ITHREADS
878 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1392 MUTEX_INIT (&coro_mutex);
1393#endif
1394 BOOT_PAGESIZE;
1395
879 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1396 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
880 1397
1398 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1399 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1400 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1401 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1402
881 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1403 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
882 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1404 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
883 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1405 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1406 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1407 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
884 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1408 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
885 1409 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
886 if (!padlist_cache)
887 padlist_cache = newHV ();
888 1410
889 main_mainstack = PL_mainstack; 1411 main_mainstack = PL_mainstack;
1412 main_top_env = PL_top_env;
1413
1414 while (main_top_env->je_prev)
1415 main_top_env = main_top_env->je_prev;
890 1416
891 coroapi.ver = CORO_API_VERSION; 1417 coroapi.ver = CORO_API_VERSION;
892 coroapi.transfer = api_transfer; 1418 coroapi.transfer = api_transfer;
893}
894 1419
895Coro::State 1420 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
896_newprocess(args) 1421}
897 SV * args 1422
898 PROTOTYPE: $ 1423SV *
1424new (char *klass, ...)
899 CODE: 1425 CODE:
900 Coro__State coro; 1426{
1427 struct coro *coro;
1428 HV *hv;
1429 int i;
901 1430
902 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
903 croak ("Coro::State::_newprocess expects an arrayref");
904
905 New (0, coro, 1, struct coro); 1431 Newz (0, coro, 1, struct coro);
1432 coro->args = newAV ();
1433 coro->save = CORO_SAVE_DEF;
1434 coro->flags = CF_NEW;
906 1435
907 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1436 if (coro_first) coro_first->prev = coro;
908 coro->mainstack = 0; /* actual work is done inside transfer */ 1437 coro->next = coro_first;
909 coro->stack = 0; 1438 coro_first = coro;
910 1439
911 RETVAL = coro; 1440 coro->hv = hv = newHV ();
1441 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1442 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1443
1444 for (i = 1; i < items; i++)
1445 av_push (coro->args, newSVsv (ST (i)));
1446}
912 OUTPUT: 1447 OUTPUT:
913 RETVAL 1448 RETVAL
914 1449
1450int
1451save (SV *coro, int new_save = -1)
1452 CODE:
1453 RETVAL = api_save (coro, new_save);
1454 OUTPUT:
1455 RETVAL
1456
1457int
1458save_also (SV *coro_sv, int save_also)
1459 CODE:
1460{
1461 struct coro *coro = SvSTATE (coro_sv);
1462 RETVAL = coro->save;
1463 coro->save |= save_also;
1464}
1465 OUTPUT:
1466 RETVAL
1467
915void 1468void
916transfer(prev, next, flags) 1469_set_stacklevel (...)
917 Coro::State_or_hashref prev 1470 ALIAS:
918 Coro::State_or_hashref next 1471 Coro::State::transfer = 1
919 int flags 1472 Coro::schedule = 2
920 PROTOTYPE: @ 1473 Coro::cede = 3
1474 Coro::cede_notself = 4
921 CODE: 1475 CODE:
922 PUTBACK; 1476{
923 transfer (aTHX_ prev, next, flags); 1477 struct transfer_args ta;
924 SPAGAIN; 1478
1479 switch (ix)
1480 {
1481 case 0:
1482 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1483 ta.next = 0;
1484 break;
1485
1486 case 1:
1487 if (items != 2)
1488 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1489
1490 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1491 break;
1492
1493 case 2:
1494 prepare_schedule (aTHX_ &ta);
1495 break;
1496
1497 case 3:
1498 prepare_cede (aTHX_ &ta);
1499 break;
1500
1501 case 4:
1502 if (!prepare_cede_notself (aTHX_ &ta))
1503 XSRETURN_EMPTY;
1504
1505 break;
1506 }
1507
1508 BARRIER;
1509 TRANSFER (ta);
1510
1511 if (GIMME_V != G_VOID && ta.next != ta.prev)
1512 XSRETURN_YES;
1513}
1514
1515bool
1516_destroy (SV *coro_sv)
1517 CODE:
1518 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1519 OUTPUT:
1520 RETVAL
925 1521
926void 1522void
927DESTROY(coro)
928 Coro::State coro
929 CODE:
930
931 if (coro->mainstack && coro->mainstack != main_mainstack)
932 {
933 struct coro temp;
934
935 PUTBACK;
936 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
937 LOAD(aTHX_ coro);
938 SPAGAIN;
939
940 destroy_stacks (aTHX);
941
942 LOAD((&temp)); /* this will get rid of defsv etc.. */
943 SPAGAIN;
944
945 coro->mainstack = 0;
946 }
947
948 deallocate_stack (coro);
949
950 Safefree (coro);
951
952void
953flush()
954 CODE:
955#ifdef MAY_FLUSH
956 flush_padlist_cache ();
957#endif
958
959void
960_exit(code) 1523_exit (code)
961 int code 1524 int code
962 PROTOTYPE: $ 1525 PROTOTYPE: $
963 CODE: 1526 CODE:
964#if defined(__GLIBC__) || _POSIX_C_SOURCE
965 _exit (code); 1527 _exit (code);
966#else
967 signal (SIGTERM, SIG_DFL);
968 raise (SIGTERM);
969 exit (code);
970#endif
971 1528
972MODULE = Coro::State PACKAGE = Coro::Cont 1529int
1530cctx_stacksize (int new_stacksize = 0)
1531 CODE:
1532 RETVAL = coro_stacksize;
1533 if (new_stacksize)
1534 coro_stacksize = new_stacksize;
1535 OUTPUT:
1536 RETVAL
973 1537
974# this is slightly dirty (should expose a c-level api) 1538int
1539cctx_count ()
1540 CODE:
1541 RETVAL = cctx_count;
1542 OUTPUT:
1543 RETVAL
1544
1545int
1546cctx_idle ()
1547 CODE:
1548 RETVAL = cctx_idle;
1549 OUTPUT:
1550 RETVAL
975 1551
976void 1552void
977yield(...) 1553list ()
978 PROTOTYPE: @ 1554 PPCODE:
1555{
1556 struct coro *coro;
1557 for (coro = coro_first; coro; coro = coro->next)
1558 if (coro->hv)
1559 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1560}
1561
1562void
1563call (Coro::State coro, SV *coderef)
1564 ALIAS:
1565 eval = 1
1566 CODE:
1567{
1568 if (coro->mainstack)
1569 {
1570 struct coro temp;
1571 Zero (&temp, 1, struct coro);
1572 temp.save = CORO_SAVE_ALL;
1573
1574 if (!(coro->flags & CF_RUNNING))
1575 {
1576 save_perl (aTHX_ &temp);
1577 load_perl (aTHX_ coro);
1578 }
1579
1580 {
1581 dSP;
1582 ENTER;
1583 SAVETMPS;
1584 PUSHMARK (SP);
1585 PUTBACK;
1586 if (ix)
1587 eval_sv (coderef, 0);
1588 else
1589 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1590 SPAGAIN;
1591 FREETMPS;
1592 LEAVE;
1593 PUTBACK;
1594 }
1595
1596 if (!(coro->flags & CF_RUNNING))
1597 {
1598 save_perl (aTHX_ coro);
1599 load_perl (aTHX_ &temp);
1600 }
1601 }
1602}
1603
1604SV *
1605is_ready (Coro::State coro)
1606 PROTOTYPE: $
1607 ALIAS:
1608 is_ready = CF_READY
1609 is_running = CF_RUNNING
1610 is_new = CF_NEW
1611 is_destroyed = CF_DESTROYED
1612 CODE:
1613 RETVAL = boolSV (coro->flags & ix);
1614 OUTPUT:
1615 RETVAL
1616
1617void
1618api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1619
1620SV *
1621has_stack (Coro::State coro)
1622 PROTOTYPE: $
1623 CODE:
1624 RETVAL = boolSV (!!coro->cctx);
1625 OUTPUT:
1626 RETVAL
1627
1628int
1629is_traced (Coro::State coro)
1630 PROTOTYPE: $
1631 CODE:
1632 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1633 OUTPUT:
1634 RETVAL
1635
1636IV
1637rss (Coro::State coro)
1638 PROTOTYPE: $
1639 ALIAS:
1640 usecount = 1
979 CODE: 1641 CODE:
980 static SV *returnstk; 1642 switch (ix)
981 SV *sv; 1643 {
982 AV *defav = GvAV (PL_defgv); 1644 case 0: RETVAL = coro_rss (aTHX_ coro); break;
983 struct coro *prev, *next; 1645 case 1: RETVAL = coro->usecount; break;
1646 }
1647 OUTPUT:
1648 RETVAL
984 1649
985 if (!returnstk)
986 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
987
988 /* set up @_ -- ugly */
989 av_clear (defav);
990 av_fill (defav, items - 1);
991 while (items--)
992 av_store (defav, items, SvREFCNT_inc (ST(items)));
993
994 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
995 sv = av_pop ((AV *)SvRV (returnstk));
996 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
997 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
998 SvREFCNT_dec (sv);
999
1000 transfer(aTHX_ prev, next, 0);
1001 1650
1002MODULE = Coro::State PACKAGE = Coro 1651MODULE = Coro::State PACKAGE = Coro
1003 1652
1004# this is slightly dirty (should expose a c-level api)
1005
1006BOOT: 1653BOOT:
1007{ 1654{
1008 int i; 1655 int i;
1656
1657 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1658 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1659 av_async_pool = get_av ("Coro::async_pool", TRUE);
1660
1661 coro_current = get_sv ("Coro::current", FALSE);
1662 SvREADONLY_on (coro_current);
1663
1009 HV *stash = gv_stashpv ("Coro", TRUE); 1664 coro_stash = gv_stashpv ("Coro", TRUE);
1010 1665
1011 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1666 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1012 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1667 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1013 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1668 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1014 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1669 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1015 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1670 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1016 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1671 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1017
1018 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1019 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1020 1672
1021 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1673 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1022 coro_ready[i] = newAV (); 1674 coro_ready[i] = newAV ();
1023 1675
1024 { 1676 {
1025 SV *sv = perl_get_sv("Coro::API", 1); 1677 SV *sv = perl_get_sv("Coro::API", 1);
1026 1678
1027 coroapi.schedule = api_schedule; 1679 coroapi.schedule = api_schedule;
1680 coroapi.save = api_save;
1681 coroapi.cede = api_cede;
1682 coroapi.cede_notself = api_cede_notself;
1028 coroapi.ready = api_ready; 1683 coroapi.ready = api_ready;
1684 coroapi.is_ready = api_is_ready;
1029 coroapi.nready = &coro_nready; 1685 coroapi.nready = &coro_nready;
1030 coroapi.current = coro_current; 1686 coroapi.current = coro_current;
1031 1687
1032 GCoroAPI = &coroapi; 1688 GCoroAPI = &coroapi;
1033 sv_setiv(sv, (IV)&coroapi); 1689 sv_setiv (sv, (IV)&coroapi);
1034 SvREADONLY_on(sv); 1690 SvREADONLY_on (sv);
1035 } 1691 }
1036} 1692}
1037 1693
1038void 1694void
1039ready(self) 1695_set_current (SV *current)
1040 SV * self 1696 PROTOTYPE: $
1041 CODE: 1697 CODE:
1042 api_ready (self); 1698 SvREFCNT_dec (SvRV (coro_current));
1699 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1043 1700
1044int 1701int
1702prio (Coro::State coro, int newprio = 0)
1703 ALIAS:
1704 nice = 1
1705 CODE:
1706{
1707 RETVAL = coro->prio;
1708
1709 if (items > 1)
1710 {
1711 if (ix)
1712 newprio = coro->prio - newprio;
1713
1714 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1715 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1716
1717 coro->prio = newprio;
1718 }
1719}
1720 OUTPUT:
1721 RETVAL
1722
1723SV *
1724ready (SV *self)
1725 PROTOTYPE: $
1726 CODE:
1727 RETVAL = boolSV (api_ready (self));
1728 OUTPUT:
1729 RETVAL
1730
1731int
1045nready(...) 1732nready (...)
1046 PROTOTYPE: 1733 PROTOTYPE:
1047 CODE: 1734 CODE:
1048 RETVAL = coro_nready; 1735 RETVAL = coro_nready;
1049 OUTPUT: 1736 OUTPUT:
1050 RETVAL 1737 RETVAL
1051 1738
1739# for async_pool speedup
1052void 1740void
1053schedule(...) 1741_pool_1 (SV *cb)
1054 PROTOTYPE:
1055 ALIAS:
1056 cede = 1
1057 CODE: 1742 CODE:
1058 api_schedule (ix); 1743{
1744 int i, len;
1745 HV *hv = (HV *)SvRV (coro_current);
1746 AV *defav = GvAV (PL_defgv);
1747 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1748 AV *invoke_av;
1059 1749
1750 if (!invoke)
1751 croak ("\3terminate\2\n");
1752
1753 hv_store (hv, "desc", sizeof ("desc") - 1,
1754 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1755
1756 invoke_av = (AV *)SvRV (invoke);
1757 len = av_len (invoke_av);
1758
1759 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1760
1761 if (len > 0)
1762 {
1763 av_fill (defav, len - 1);
1764 for (i = 0; i < len; ++i)
1765 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1766 }
1767
1768 SvREFCNT_dec (invoke);
1769}
1770
1771void
1772_pool_2 (SV *cb)
1773 CODE:
1774{
1775 struct coro *coro = SvSTATE (coro_current);
1776
1777 sv_setsv (cb, &PL_sv_undef);
1778
1779 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1780 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1781 croak ("\3terminate\2\n");
1782
1783 av_clear (GvAV (PL_defgv));
1784 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1785 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1786
1787 coro->save = CORO_SAVE_DEF;
1788 coro->prio = 0;
1789
1790 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1791 api_trace (coro_current, 0);
1792
1793 av_push (av_async_pool, newSVsv (coro_current));
1794}
1795
1796
1797MODULE = Coro::State PACKAGE = Coro::AIO
1798
1799SV *
1800_get_state ()
1801 CODE:
1802{
1803 struct io_state *data;
1804
1805 RETVAL = newSV (sizeof (struct io_state));
1806 data = (struct io_state *)SvPVX (RETVAL);
1807 SvCUR_set (RETVAL, sizeof (struct io_state));
1808 SvPOK_only (RETVAL);
1809
1810 data->errorno = errno;
1811 data->laststype = PL_laststype;
1812 data->laststatval = PL_laststatval;
1813 data->statcache = PL_statcache;
1814}
1815 OUTPUT:
1816 RETVAL
1817
1818void
1819_set_state (char *data_)
1820 PROTOTYPE: $
1821 CODE:
1822{
1823 struct io_state *data = (void *)data_;
1824
1825 errno = data->errorno;
1826 PL_laststype = data->laststype;
1827 PL_laststatval = data->laststatval;
1828 PL_statcache = data->statcache;
1829}
1830

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