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Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.177 by root, Tue Oct 2 10:24:44 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_ANONYMOUS 18# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS 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 IN_DESTRUCT (PL_main_cv == Nullcv) 98#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 99
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 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))
34 109
35#include "CoroAPI.h" 110#include "CoroAPI.h"
36 111
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;
37static 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 */
38 136
39/* 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 */
40typedef struct { 155typedef struct coro_cctx {
41 int refcnt; /* pointer reference counter */ 156 struct coro_cctx *next;
42 int usecnt; /* shared by how many coroutines */
43 int gencnt; /* generation counter */
44 157
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;
45 coro_context cctx; 166 coro_context cctx;
46 167
47 void *sptr; 168#if CORO_USE_VALGRIND
48 long ssize; /* positive == mmap, otherwise malloc */ 169 int valgrind_id;
49} coro_stack; 170#endif
171 unsigned char flags;
172} coro_cctx;
50 173
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 */
51struct coro { 182struct coro {
52 /* the optional C context */ 183 /* the c coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 184 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56
57 /* optionally saved, might be zero */
58 AV *defav;
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65
66 /* the stacks and related info (callchain etc..) */
67 PERL_SI *curstackinfo;
68 AV *curstack;
69 AV *mainstack;
70 SV **stack_sp;
71 OP *op;
72 SV **curpad;
73 AV *comppad;
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 *top_env;
94 185
95 /* data associated with this coroutine (initial args) */ 186 /* data associated with this coroutine (initial args) */
96 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 */
97}; 213};
98 214
99typedef struct coro *Coro__State; 215typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 216typedef struct coro *Coro__State_or_hashref;
101 217
102static AV *main_mainstack; /* used to differentiate between $main and others */ 218/** Coro ********************************************************************/
103static HV *coro_state_stash;
104static SV *ucoro_state_sv;
105static U32 ucoro_state_hash;
106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
108 219
109/* mostly copied from op.c:cv_clone2 */ 220#define PRIO_MAX 3
110STATIC AV * 221#define PRIO_HIGH 1
111clone_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)
112{ 237{
113 AV *av; 238 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; 239 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);
131 240
132 newpadlist = newAV (); 241 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 242 AvREAL_off (newpadlist);
134 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)));
135 av_store (newpadlist, 1, (SV *) newpad); 252 av_store (newpadlist, 1, (SV *)newpad);
136 253
137 av = newAV (); /* will be @_ */ 254 return newpadlist;
138 av_extend (av, 0); 255}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 256
142 for (ix = fpad; ix > 0; ix--) 257static void
258free_padlist (pTHX_ AV *padlist)
259{
260 /* may be during global destruction */
261 if (SvREFCNT (padlist))
143 { 262 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 263 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 264 while (i >= 0)
146 { 265 {
147 char *name = SvPVX (namesv); /* XXX */ 266 SV **svp = av_fetch (padlist, i--, FALSE);
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 267 if (svp)
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 268 {
152 else
153 { /* our own lexical */
154 SV *sv; 269 SV *sv;
155 if (*name == '&') 270 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156 sv = SvREFCNT_inc (ppad[ix]); 271 SvREFCNT_dec (sv);
157 else if (*name == '@') 272
158 sv = (SV *) newAV (); 273 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 } 274 }
167 } 275 }
168 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))
169 { 400 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]); 401 SvREFCNT_dec (c->irssv);
402 c->irssv = 0;
171 } 403 }
172 else 404 else
173 { 405 {
174 SV *sv = NEWSV (0, 0); 406 REPLACE_SV (PL_rs, c->irssv);
175 SvPADTMP_on (sv); 407 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
176 npad[ix] = sv; 408 sv_setsv (c->irssv_sv, PL_rs);
177 } 409 }
178 } 410 }
179
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 void
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);
220 }
221}
222#endif
223
224/* the next two functions merely cache the padlists */
225STATIC void
226get_padlist (CV *cv)
227{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230 if (he && AvFILLp ((AV *)*he) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232 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 {
243 SvREFCNT_dec (*he);
244 *he = (SV *)newAV ();
245 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248}
249
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
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 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) load_state(aTHX_ (state));
280#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void
285load_state(pTHX_ Coro__State c)
286{
287 PL_dowarn = c->dowarn;
288 PL_in_eval = c->in_eval;
289
290 PL_curstackinfo = c->curstackinfo;
291 PL_curstack = c->curstack;
292 PL_mainstack = c->mainstack;
293 PL_stack_sp = c->stack_sp;
294 PL_op = c->op;
295 PL_curpad = c->curpad;
296 PL_comppad = c->comppad;
297 PL_stack_base = c->stack_base;
298 PL_stack_max = c->stack_max;
299 PL_tmps_stack = c->tmps_stack;
300 PL_tmps_floor = c->tmps_floor;
301 PL_tmps_ix = c->tmps_ix;
302 PL_tmps_max = c->tmps_max;
303 PL_markstack = c->markstack;
304 PL_markstack_ptr = c->markstack_ptr;
305 PL_markstack_max = c->markstack_max;
306 PL_scopestack = c->scopestack;
307 PL_scopestack_ix = c->scopestack_ix;
308 PL_scopestack_max = c->scopestack_max;
309 PL_savestack = c->savestack;
310 PL_savestack_ix = c->savestack_ix;
311 PL_savestack_max = c->savestack_max;
312 PL_retstack = c->retstack;
313 PL_retstack_ix = c->retstack_ix;
314 PL_retstack_max = c->retstack_max;
315 PL_curcop = c->curcop;
316 PL_top_env = c->top_env;
317
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321 411
322 { 412 {
323 dSP; 413 dSP;
324 CV *cv; 414 CV *cv;
325 415
326 /* now do the ugly restore mess */ 416 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 417 while ((cv = (CV *)POPs))
328 { 418 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 419 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 420 CvDEPTH (cv) = PTR2IV (POPs);
335#ifdef USE_THREADS 421 CvPADLIST (cv) = (AV *)POPs;
336 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337#endif
338 }
339
340 ++CvDEPTH(cv);
341 } 422 }
342 423
343 PUTBACK; 424 PUTBACK;
344 } 425 }
345} 426}
346 427
347static void 428static void
348save_state(pTHX_ Coro__State c, int flags) 429save_perl (pTHX_ Coro__State c)
349{ 430{
350 { 431 {
351 dSP; 432 dSP;
352 I32 cxix = cxstack_ix; 433 I32 cxix = cxstack_ix;
353 PERL_CONTEXT *ccstk = cxstack; 434 PERL_CONTEXT *ccstk = cxstack;
… …
356 /* 437 /*
357 * 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
358 * (and reinitialize) all cv's in the whole callchain :( 439 * (and reinitialize) all cv's in the whole callchain :(
359 */ 440 */
360 441
361 PUSHs (Nullsv); 442 XPUSHs (Nullsv);
362 /* this loop was inspired by pp_caller */ 443 /* this loop was inspired by pp_caller */
363 for (;;) 444 for (;;)
364 { 445 {
365 while (cxix >= 0) 446 while (cxix >= 0)
366 { 447 {
367 PERL_CONTEXT *cx = &ccstk[cxix--]; 448 PERL_CONTEXT *cx = &ccstk[cxix--];
368 449
369 if (CxTYPE(cx) == CXt_SUB) 450 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
370 { 451 {
371 CV *cv = cx->blk_sub.cv; 452 CV *cv = cx->blk_sub.cv;
453
372 if (CvDEPTH(cv)) 454 if (CvDEPTH (cv))
373 { 455 {
374#ifdef USE_THREADS
375 /*XPUSHs ((SV *)CvOWNER(cv));*/
376 /*CvOWNER(cv) = 0;*/
377 /*error must unlock this cv etc.. etc...*/
378#endif
379 EXTEND (SP, CvDEPTH(cv)*2); 456 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 457 PUSHs ((SV *)CvPADLIST (cv));
458 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 459 PUSHs ((SV *)cv);
390 460
391 get_padlist (cv); /* this is a monster */ 461 CvDEPTH (cv) = 0;
462 get_padlist (aTHX_ cv);
392 } 463 }
393 } 464 }
394 else if (CxTYPE(cx) == CXt_FORMAT)
395 {
396 /* I never used formats, so how should I know how these are implemented? */
397 /* my bold guess is as a simple, plain sub... */
398 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399 }
400 } 465 }
401 466
402 if (top_si->si_type == PERLSI_MAIN) 467 if (top_si->si_type == PERLSI_MAIN)
403 break; 468 break;
404 469
405 top_si = top_si->si_prev; 470 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 471 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 472 cxix = top_si->si_cxix;
408 } 473 }
409 474
410 PUTBACK; 475 PUTBACK;
411 } 476 }
412 477
413 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;
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 479 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
415 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;
416 483
417 c->dowarn = PL_dowarn; 484#define VAR(name,type)c->name = PL_ ## name;
418 c->in_eval = PL_in_eval; 485# include "state.h"
419 486#undef VAR
420 c->curstackinfo = PL_curstackinfo;
421 c->curstack = PL_curstack;
422 c->mainstack = PL_mainstack;
423 c->stack_sp = PL_stack_sp;
424 c->op = PL_op;
425 c->curpad = PL_curpad;
426 c->comppad = PL_comppad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447} 487}
448 488
449/* 489/*
450 * allocate various perl stacks. This is an exact copy 490 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 491 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 492 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 493 * not usually need a lot of stackspace.
454 */ 494 */
455STATIC void 495#if CORO_PREFER_PERL_FUNCTIONS
496# define coro_init_stacks init_stacks
497#else
498static void
456coro_init_stacks (pTHX) 499coro_init_stacks (pTHX)
457{ 500{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 501 PL_curstackinfo = new_stackinfo(64, 6);
459 PL_curstackinfo->si_type = PERLSI_MAIN; 502 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 503 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 505
463 PL_stack_base = AvARRAY(PL_curstack); 506 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base; 507 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466 509
467 New(50,PL_tmps_stack,96,SV*); 510 New(50,PL_tmps_stack,64,SV*);
468 PL_tmps_floor = -1; 511 PL_tmps_floor = -1;
469 PL_tmps_ix = -1; 512 PL_tmps_ix = -1;
470 PL_tmps_max = 96; 513 PL_tmps_max = 64;
471 514
472 New(54,PL_markstack,16,I32); 515 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 516 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 517 PL_markstack_max = PL_markstack + 16;
475 518
519#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 520 SET_MARK_OFFSET;
521#endif
477 522
478 New(54,PL_scopestack,16,I32); 523 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0; 524 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 525 PL_scopestack_max = 16;
481 526
482 New(54,PL_savestack,96,ANY); 527 New(54,PL_savestack,64,ANY);
483 PL_savestack_ix = 0; 528 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 529 PL_savestack_max = 64;
485 530
531#if !PERL_VERSION_ATLEAST (5,9,0)
486 New(54,PL_retstack,8,OP*); 532 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 533 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 534 PL_retstack_max = 4;
535#endif
489} 536}
537#endif
490 538
491/* 539/*
492 * destroy the stacks, the callchain etc... 540 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 541 */
495STATIC void 542static void
496destroy_stacks(pTHX) 543coro_destroy_stacks (pTHX)
497{ 544{
498 if (!IN_DESTRUCT) 545 if (!IN_DESTRUCT)
499 { 546 {
500 /* is this ugly, I ask? */ 547 /* restore all saved variables and stuff */
501 while (PL_scopestack_ix) 548 LEAVE_SCOPE (0);
502 LEAVE; 549 assert (PL_tmps_floor == -1);
503 550
504 /* sure it is, but more important: is it correct?? :/ */ 551 /* free all temporaries */
505 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506 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);
507 } 560 }
508 561
509 while (PL_curstackinfo->si_next) 562 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 563 PL_curstackinfo = PL_curstackinfo->si_next;
511 564
512 while (PL_curstackinfo) 565 while (PL_curstackinfo)
513 { 566 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 567 PERL_SI *p = PL_curstackinfo->si_prev;
515 568
516 {
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 569 if (!IN_DESTRUCT)
523 {
524 dounwind(-1);
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 570 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 571
528 Safefree(PL_curstackinfo->si_cxstack); 572 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree(PL_curstackinfo); 573 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 574 PL_curstackinfo = p;
531 } 575 }
532 576
533 Safefree(PL_tmps_stack); 577 Safefree (PL_tmps_stack);
534 Safefree(PL_markstack); 578 Safefree (PL_markstack);
535 Safefree(PL_scopestack); 579 Safefree (PL_scopestack);
536 Safefree(PL_savestack); 580 Safefree (PL_savestack);
581#if !PERL_VERSION_ATLEAST (5,9,0)
537 Safefree(PL_retstack); 582 Safefree (PL_retstack);
583#endif
538} 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 ************************************************/
539 618
540static void 619static void
541allocate_stack (Coro__State ctx, int alloc) 620setup_coro (pTHX_ struct coro *coro)
542{
543 coro_stack *stack;
544
545 New (0, stack, 1, coro_stack);
546
547 stack->refcnt = 1;
548 stack->usecnt = 1;
549 stack->gencnt = ctx->gencnt = 0;
550 if (alloc)
551 {
552#if HAVE_MMAP
553 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555 if (stack->sptr == (void *)-1)
556#endif
557 {
558 /*FIXME*//*D*//* reasonable stack size! */
559 stack->ssize = -4096 * sizeof (long);
560 New (0, stack->sptr, 4096, long);
561 }
562 }
563 else
564 stack->sptr = 0;
565
566 ctx->stack = stack;
567}
568
569static void
570deallocate_stack (Coro__State ctx)
571{
572 coro_stack *stack = ctx->stack;
573
574 ctx->stack = 0;
575
576 if (stack)
577 {
578 if (!--stack->refcnt)
579 {
580#ifdef HAVE_MMAP
581 if (stack->ssize > 0 && stack->sptr)
582 munmap (stack->sptr, stack->ssize);
583 else
584#else
585 Safefree (stack->sptr);
586#endif
587 Safefree (stack);
588 }
589 else if (ctx->gencnt == stack->gencnt)
590 --stack->usecnt;
591 }
592}
593
594static void
595setup_coro (void *arg)
596{ 621{
597 /* 622 /*
598 * emulate part of the perl startup here. 623 * emulate part of the perl startup here.
599 */ 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{
600 dSP; 797 dSP;
601 Coro__State ctx = (Coro__State)arg; 798 LOGOP myop;
602 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603 799
604 coro_init_stacks (aTHX); 800 PL_top_env = &PL_start_env;
605 /*PL_curcop = 0;*/
606 /*PL_in_eval = PL_in_eval;*/ /* inherit */
607 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args;
609 801
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);
610 SPAGAIN; 816 SPAGAIN;
817}
611 818
612 if (ctx->stack) 819/*
613 { 820 * this is a _very_ stripped down perl interpreter ;)
614 ctx->cursp = 0; 821 */
822static void
823coro_run (void *arg)
824{
825 dTHX;
615 826
616 PUSHMARK(SP); 827 /* coro_run is the alternative tail of transfer(), so unlock here. */
617 PUTBACK; 828 UNLOCK;
618 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619 829
620 if (SvTRUE (ERRSV)) 830 /* we now skip the entersub that lead to transfer() */
621 croak (NULL); 831 PL_op = PL_op->op_next;
622 else 832
623 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;
624 } 876 }
625 else 877 else
626 { 878#endif
627 UNOP myop;
628
629 PL_op = (OP *)&myop;
630
631 Zero(&myop, 1, UNOP);
632 myop.op_next = Nullop;
633 myop.op_flags = OPf_WANT_VOID;
634
635 PUSHMARK(SP);
636 XPUSHs (sub_init);
637 /*
638 * the next line is slightly wrong, as PL_op->op_next
639 * is actually being executed so we skip the first op.
640 * that doesn't matter, though, since it is only
641 * pp_nextstate and we never return...
642 * ah yes, and I don't care anyways ;)
643 */
644 PUTBACK;
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646 SPAGAIN;
647
648 ENTER; /* necessary e.g. for dounwind */
649 } 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;
650} 897}
651 898
652static void 899static void
653continue_coro (void *arg) 900cctx_destroy (coro_cctx *cctx)
654{ 901{
655 /* 902 if (!cctx)
656 * this is a _very_ stripped down perl interpreter ;) 903 return;
657 */
658 Coro__State ctx = (Coro__State)arg;
659 JMPENV coro_start_env;
660 904
661 /* same as JMPENV_BOOTSTRAP */ 905 --cctx_count;
662 Zero(&coro_start_env, 1, JMPENV);
663 coro_start_env.je_ret = -1;
664 coro_start_env.je_mustcatch = TRUE;
665 PL_top_env = &coro_start_env;
666 906
667 ctx->cursp = 0; 907#if CORO_USE_VALGRIND
668 PL_op = PL_op->op_next; 908 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
669 CALLRUNOPS(aTHX); 909#endif
670 910
671 abort (); 911#if HAVE_MMAP
672} 912 if (cctx->flags & CC_MAPPED)
913 munmap (cctx->sptr, cctx->ssize);
914 else
915#endif
916 Safefree (cctx->sptr);
673 917
674STATIC void 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
675transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 980transfer (pTHX_ struct coro *prev, struct coro *next)
676{ 981{
677 dSTACKLEVEL; 982 dSTACKLEVEL;
678 static struct coro *xnext;
679 983
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 }
680 if (prev != next) 990 else if (prev != next)
681 { 991 {
682 xnext = next; 992 coro_cctx *prev__cctx;
683 993
684 if (next->mainstack) 994 if (prev->flags & CF_NEW)
685 { 995 {
686 SAVE (prev, flags); 996 /* create a new empty context */
687 LOAD (next); 997 Newz (0, prev->cctx, 1, coro_cctx);
688 998 prev->flags &= ~CF_NEW;
689 /* mark this state as in-use */ 999 prev->flags |= CF_RUNNING;
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 {
696 if (!prev->stack)
697 allocate_stack (prev, 0);
698 else if (prev->cursp != stacklevel
699 && prev->stack->usecnt > 1)
700 {
701 prev->gencnt = ++prev->stack->gencnt;
702 prev->stack->usecnt = 1;
703 }
704
705 /* has our stack been invalidated? */
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 {
708 deallocate_stack (next);
709 allocate_stack (next, 1);
710 coro_create (&(next->stack->cctx),
711 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize));
713 }
714
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 /* don't add any code here */
717 }
718
719 } 1000 }
720 else if (next->tmps_ix == -2) 1001
721 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 }
722 else 1016 else
723 { 1017 {
724 SAVE (prev, -1); /* first get rid of the old state */ 1018 /* coroutine already started */
725 1019 save_perl (aTHX_ prev);
726 if (flags & TRANSFER_SAVE_CCTXT) 1020 load_perl (aTHX_ next);
727 {
728 if (!prev->stack)
729 allocate_stack (prev, 0);
730
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 {
733 setup_coro (next);
734
735 prev->stack->refcnt++;
736 prev->stack->usecnt++;
737 next->stack = prev->stack;
738 next->gencnt = prev->gencnt;
739 }
740 else
741 {
742 allocate_stack (next, 1);
743 coro_create (&(next->stack->cctx),
744 setup_coro, (void *)next,
745 next->stack->sptr, labs (next->stack->ssize));
746 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747 /* don't add any code here */
748 }
749 }
750 else
751 setup_coro (next);
752 } 1021 }
753 1022
754 /* 1023 prev__cctx = prev->cctx;
755 * xnext is now either prev or next, depending on wether 1024
756 * we switched the c stack or not. that's why I use a global 1025 /* possibly "free" the cctx */
757 * variable, that should become thread-specific at one point. 1026 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
758 */ 1027 {
759 xnext->cursp = stacklevel; 1028 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
760 } 1029 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
761 1030
762 if (coro_mortal) 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;
763 { 1050 }
764 SvREFCNT_dec (coro_mortal); 1051}
765 coro_mortal = 0; 1052
1053struct transfer_args
1054{
1055 struct coro *prev, *next;
1056};
1057
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)
766 } 1072 {
767} 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;
1078 }
1079 else
1080 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768 1081
769#define SV_CORO(sv,func) \ 1082 if (coro->mainstack && coro->mainstack != main_mainstack)
770 do { \ 1083 {
771 if (SvROK (sv)) \ 1084 struct coro temp;
772 sv = SvRV (sv); \
773 \
774 if (SvTYPE(sv) == SVt_PVHV) \
775 { \
776 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777 \
778 if (!he) \
779 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780 \
781 (sv) = SvRV (HeVAL(he)); \
782 } \
783 \
784 /* must also be changed inside Coro::Cont::yield */ \
785 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787 \
788 } while(0)
789 1085
790#define SvSTATE(sv) (struct coro *)SvIV (sv) 1086 if (coro->flags & CF_RUNNING)
1087 croak ("FATAL: tried to destroy currently running coroutine");
1088
1089 Zero (&temp, 1, struct coro);
1090 temp.save = CORO_SAVE_ALL;
1091
1092 save_perl (aTHX_ &temp);
1093 load_perl (aTHX_ coro);
1094
1095 coro_destroy_stacks (aTHX);
1096
1097 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1098
1099 coro->mainstack = 0;
1100 }
1101
1102 cctx_destroy (coro->cctx);
1103 SvREFCNT_dec (coro->args);
1104
1105 if (coro->next) coro->next->prev = coro->prev;
1106 if (coro->prev) coro->prev->next = coro->next;
1107 if (coro == coro_first) coro_first = coro->next;
1108
1109 return 1;
1110}
1111
1112static int
1113coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1114{
1115 struct coro *coro = (struct coro *)mg->mg_ptr;
1116 mg->mg_ptr = 0;
1117
1118 coro->hv = 0;
1119
1120 if (--coro->refcnt < 0)
1121 {
1122 coro_state_destroy (aTHX_ coro);
1123 Safefree (coro);
1124 }
1125
1126 return 0;
1127}
1128
1129static int
1130coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1131{
1132 struct coro *coro = (struct coro *)mg->mg_ptr;
1133
1134 ++coro->refcnt;
1135
1136 return 0;
1137}
1138
1139static MGVTBL coro_state_vtbl = {
1140 0, 0, 0, 0,
1141 coro_state_free,
1142 0,
1143#ifdef MGf_DUP
1144 coro_state_dup,
1145#else
1146# define MGf_DUP 0
1147#endif
1148};
791 1149
792static void 1150static void
1151prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1152{
1153 ta->prev = SvSTATE (prev_sv);
1154 ta->next = SvSTATE (next_sv);
1155 TRANSFER_CHECK (*ta);
1156}
1157
1158static void
793api_transfer(pTHX_ SV *prev, SV *next, int flags) 1159api_transfer (SV *prev_sv, SV *next_sv)
794{ 1160{
795 SV_CORO (prev, "Coro::transfer"); 1161 dTHX;
796 SV_CORO (next, "Coro::transfer"); 1162 struct transfer_args ta;
797 1163
798 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 1164 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1165 TRANSFER (ta);
1166}
1167
1168static int
1169api_save (SV *coro_sv, int new_save)
1170{
1171 dTHX;
1172 struct coro *coro = SvSTATE (coro_sv);
1173 int old_save = coro->save;
1174
1175 if (new_save >= 0)
1176 coro->save = new_save;
1177
1178 return old_save;
799} 1179}
800 1180
801/** Coro ********************************************************************/ 1181/** Coro ********************************************************************/
802 1182
803#define PRIO_MAX 3
804#define PRIO_HIGH 1
805#define PRIO_NORMAL 0
806#define PRIO_LOW -1
807#define PRIO_IDLE -3
808#define PRIO_MIN -4
809
810/* for Coro.pm */
811static GV *coro_current, *coro_idle;
812static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
813static int coro_nready;
814
815static void 1183static void
816coro_enq (SV *sv) 1184coro_enq (pTHX_ SV *coro_sv)
817{ 1185{
818 if (SvTYPE (sv) == SVt_PVHV)
819 {
820 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823 prio = prio > PRIO_MAX ? PRIO_MAX
824 : prio < PRIO_MIN ? PRIO_MIN
825 : prio;
826
827 av_push (coro_ready [prio - PRIO_MIN], sv); 1186 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
828 coro_nready++;
829
830 return;
831 }
832
833 croak ("Coro::ready tried to enqueue something that is not a coroutine");
834} 1187}
835 1188
836static SV * 1189static SV *
837coro_deq (int min_prio) 1190coro_deq (pTHX_ int min_prio)
838{ 1191{
839 int prio = PRIO_MAX - PRIO_MIN; 1192 int prio = PRIO_MAX - PRIO_MIN;
840 1193
841 min_prio -= PRIO_MIN; 1194 min_prio -= PRIO_MIN;
842 if (min_prio < 0) 1195 if (min_prio < 0)
843 min_prio = 0; 1196 min_prio = 0;
844 1197
845 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1198 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846 if (av_len (coro_ready[prio]) >= 0) 1199 if (AvFILLp (coro_ready [prio]) >= 0)
847 {
848 coro_nready--;
849 return av_shift (coro_ready[prio]); 1200 return av_shift (coro_ready [prio]);
850 }
851 1201
852 return 0; 1202 return 0;
853} 1203}
854 1204
1205static int
1206api_ready (SV *coro_sv)
1207{
1208 dTHX;
1209 struct coro *coro;
1210
1211 if (SvROK (coro_sv))
1212 coro_sv = SvRV (coro_sv);
1213
1214 coro = SvSTATE (coro_sv);
1215
1216 if (coro->flags & CF_READY)
1217 return 0;
1218
1219 coro->flags |= CF_READY;
1220
1221 LOCK;
1222 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1223 ++coro_nready;
1224 UNLOCK;
1225
1226 return 1;
1227}
1228
1229static int
1230api_is_ready (SV *coro_sv)
1231{
1232 dTHX;
1233 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1234}
1235
855static void 1236static void
856api_ready (SV *coro) 1237prepare_schedule (pTHX_ struct transfer_args *ta)
857{ 1238{
858 if (SvROK (coro)) 1239 SV *prev_sv, *next_sv;
859 coro = SvRV (coro);
860 1240
861 coro_enq (SvREFCNT_inc (coro)); 1241 for (;;)
1242 {
1243 LOCK;
1244 next_sv = coro_deq (aTHX_ PRIO_MIN);
1245
1246 /* nothing to schedule: call the idle handler */
1247 if (!next_sv)
1248 {
1249 dSP;
1250 UNLOCK;
1251
1252 ENTER;
1253 SAVETMPS;
1254
1255 PUSHMARK (SP);
1256 PUTBACK;
1257 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1258
1259 FREETMPS;
1260 LEAVE;
1261 continue;
1262 }
1263
1264 ta->next = SvSTATE (next_sv);
1265
1266 /* cannot transfer to destroyed coros, skip and look for next */
1267 if (ta->next->flags & CF_DESTROYED)
1268 {
1269 UNLOCK;
1270 SvREFCNT_dec (next_sv);
1271 /* coro_nready is already taken care of by destroy */
1272 continue;
1273 }
1274
1275 --coro_nready;
1276 UNLOCK;
1277 break;
1278 }
1279
1280 /* free this only after the transfer */
1281 prev_sv = SvRV (coro_current);
1282 ta->prev = SvSTATE (prev_sv);
1283 TRANSFER_CHECK (*ta);
1284 assert (ta->next->flags & CF_READY);
1285 ta->next->flags &= ~CF_READY;
1286 SvRV_set (coro_current, next_sv);
1287
1288 LOCK;
1289 free_coro_mortal (aTHX);
1290 coro_mortal = prev_sv;
1291 UNLOCK;
1292}
1293
1294static void
1295prepare_cede (pTHX_ struct transfer_args *ta)
1296{
1297 api_ready (coro_current);
1298 prepare_schedule (aTHX_ ta);
1299}
1300
1301static int
1302prepare_cede_notself (pTHX_ struct transfer_args *ta)
1303{
1304 if (coro_nready)
1305 {
1306 SV *prev = SvRV (coro_current);
1307 prepare_schedule (aTHX_ ta);
1308 api_ready (prev);
1309 return 1;
1310 }
1311 else
1312 return 0;
862} 1313}
863 1314
864static void 1315static void
865api_schedule (void) 1316api_schedule (void)
866{ 1317{
867 SV *prev, *next; 1318 dTHX;
1319 struct transfer_args ta;
868 1320
869 prev = SvRV (GvSV (coro_current)); 1321 prepare_schedule (aTHX_ &ta);
870 next = coro_deq (PRIO_MIN); 1322 TRANSFER (ta);
1323}
871 1324
872 if (!next) 1325static int
873 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1326api_cede (void)
1327{
1328 dTHX;
1329 struct transfer_args ta;
874 1330
875 /* free this only after the transfer */ 1331 prepare_cede (aTHX_ &ta);
876 coro_mortal = prev;
877 SV_CORO (prev, "Coro::schedule");
878 1332
879 SvRV (GvSV (coro_current)) = next; 1333 if (ta.prev != ta.next)
1334 {
1335 TRANSFER (ta);
1336 return 1;
1337 }
1338 else
1339 return 0;
1340}
880 1341
881 SV_CORO (next, "Coro::schedule"); 1342static int
1343api_cede_notself (void)
1344{
1345 dTHX;
1346 struct transfer_args ta;
882 1347
883 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1348 if (prepare_cede_notself (aTHX_ &ta))
884 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1349 {
1350 TRANSFER (ta);
1351 return 1;
1352 }
1353 else
1354 return 0;
885} 1355}
886 1356
887static void 1357static void
888api_cede (void) 1358api_trace (SV *coro_sv, int flags)
889{ 1359{
890 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1360 dTHX;
1361 struct coro *coro = SvSTATE (coro_sv);
891 1362
892 api_schedule (); 1363 if (flags & CC_TRACE)
893} 1364 {
1365 if (!coro->cctx)
1366 coro->cctx = cctx_new ();
1367 else if (!(coro->cctx->flags & CC_TRACE))
1368 croak ("cannot enable tracing on coroutine with custom stack");
894 1369
1370 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1371 }
1372 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1373 {
1374 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1375
1376 if (coro->flags & CF_RUNNING)
1377 PL_runops = RUNOPS_DEFAULT;
1378 else
1379 coro->runops = RUNOPS_DEFAULT;
1380 }
1381}
1382
895MODULE = Coro::State PACKAGE = Coro::State 1383MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
896 1384
897PROTOTYPES: ENABLE 1385PROTOTYPES: DISABLE
898 1386
899BOOT: 1387BOOT:
900{ /* {} necessary for stoopid perl-5.6.x */ 1388{
901 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1389#ifdef USE_ITHREADS
902 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1390 MUTEX_INIT (&coro_mutex);
1391#endif
1392 BOOT_PAGESIZE;
1393
903 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904 1395
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1398 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1399 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1400
905 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1401 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
906 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1402 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
907 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1403 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1404 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1405 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
908 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1406 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
909 1407 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
910 if (!padlist_cache)
911 padlist_cache = newHV ();
912 1408
913 main_mainstack = PL_mainstack; 1409 main_mainstack = PL_mainstack;
1410 main_top_env = PL_top_env;
1411
1412 while (main_top_env->je_prev)
1413 main_top_env = main_top_env->je_prev;
914 1414
915 coroapi.ver = CORO_API_VERSION; 1415 coroapi.ver = CORO_API_VERSION;
916 coroapi.transfer = api_transfer; 1416 coroapi.transfer = api_transfer;
917}
918 1417
919Coro::State 1418 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920_newprocess(args) 1419}
921 SV * args 1420
922 PROTOTYPE: $ 1421SV *
1422new (char *klass, ...)
923 CODE: 1423 CODE:
924 Coro__State coro; 1424{
1425 struct coro *coro;
1426 HV *hv;
1427 int i;
925 1428
926 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927 croak ("Coro::State::_newprocess expects an arrayref");
928
929 New (0, coro, 1, struct coro); 1429 Newz (0, coro, 1, struct coro);
1430 coro->args = newAV ();
1431 coro->save = CORO_SAVE_DEF;
1432 coro->flags = CF_NEW;
930 1433
931 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1434 if (coro_first) coro_first->prev = coro;
932 coro->mainstack = 0; /* actual work is done inside transfer */ 1435 coro->next = coro_first;
933 coro->stack = 0; 1436 coro_first = coro;
934 1437
935 RETVAL = coro; 1438 coro->hv = hv = newHV ();
1439 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1440 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1441
1442 for (i = 1; i < items; i++)
1443 av_push (coro->args, newSVsv (ST (i)));
1444}
936 OUTPUT: 1445 OUTPUT:
937 RETVAL 1446 RETVAL
938 1447
1448int
1449save (SV *coro, int new_save = -1)
1450 CODE:
1451 RETVAL = api_save (coro, new_save);
1452 OUTPUT:
1453 RETVAL
1454
1455int
1456save_also (SV *coro_sv, int save_also)
1457 CODE:
1458{
1459 struct coro *coro = SvSTATE (coro_sv);
1460 RETVAL = coro->save;
1461 coro->save |= save_also;
1462}
1463 OUTPUT:
1464 RETVAL
1465
1466# these not obviously related functions are all rolled into the same xs
1467# function to increase chances that they all will call transfer with the same
1468# stack offset
939void 1469void
940transfer(prev, next, flags) 1470_set_stacklevel (...)
941 SV *prev 1471 ALIAS:
942 SV *next 1472 Coro::State::transfer = 1
943 int flags 1473 Coro::schedule = 2
944 PROTOTYPE: @ 1474 Coro::cede = 3
1475 Coro::cede_notself = 4
945 CODE: 1476 CODE:
946 PUTBACK; 1477{
947 SV_CORO (next, "Coro::transfer"); 1478 struct transfer_args ta;
948 SV_CORO (prev, "Coro::transfer"); 1479
949 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1480 switch (ix)
950 SPAGAIN; 1481 {
1482 case 0:
1483 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1484 ta.next = 0;
1485 break;
1486
1487 case 1:
1488 if (items != 2)
1489 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1490
1491 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1492 break;
1493
1494 case 2:
1495 prepare_schedule (aTHX_ &ta);
1496 break;
1497
1498 case 3:
1499 prepare_cede (aTHX_ &ta);
1500 break;
1501
1502 case 4:
1503 if (!prepare_cede_notself (aTHX_ &ta))
1504 XSRETURN_EMPTY;
1505
1506 break;
1507 }
1508
1509 BARRIER;
1510 TRANSFER (ta);
1511
1512 if (GIMME_V != G_VOID && ta.next != ta.prev)
1513 XSRETURN_YES;
1514}
1515
1516bool
1517_destroy (SV *coro_sv)
1518 CODE:
1519 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1520 OUTPUT:
1521 RETVAL
951 1522
952void 1523void
953DESTROY(coro)
954 Coro::State coro
955 CODE:
956
957 if (coro->mainstack && coro->mainstack != main_mainstack)
958 {
959 struct coro temp;
960
961 PUTBACK;
962 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963 LOAD(aTHX_ coro);
964 SPAGAIN;
965
966 destroy_stacks (aTHX);
967
968 LOAD((&temp)); /* this will get rid of defsv etc.. */
969 SPAGAIN;
970
971 coro->mainstack = 0;
972 }
973
974 deallocate_stack (coro);
975
976 Safefree (coro);
977
978void
979flush()
980 CODE:
981#ifdef MAY_FLUSH
982 flush_padlist_cache ();
983#endif
984
985void
986_exit(code) 1524_exit (code)
987 int code 1525 int code
988 PROTOTYPE: $ 1526 PROTOTYPE: $
989 CODE: 1527 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE
991 _exit (code); 1528 _exit (code);
992#else
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997 1529
998MODULE = Coro::State PACKAGE = Coro::Cont 1530int
1531cctx_stacksize (int new_stacksize = 0)
1532 CODE:
1533 RETVAL = coro_stacksize;
1534 if (new_stacksize)
1535 coro_stacksize = new_stacksize;
1536 OUTPUT:
1537 RETVAL
999 1538
1000# this is slightly dirty (should expose a c-level api) 1539int
1540cctx_count ()
1541 CODE:
1542 RETVAL = cctx_count;
1543 OUTPUT:
1544 RETVAL
1545
1546int
1547cctx_idle ()
1548 CODE:
1549 RETVAL = cctx_idle;
1550 OUTPUT:
1551 RETVAL
1001 1552
1002void 1553void
1003yield(...) 1554list ()
1004 PROTOTYPE: @ 1555 PPCODE:
1556{
1557 struct coro *coro;
1558 for (coro = coro_first; coro; coro = coro->next)
1559 if (coro->hv)
1560 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1561}
1562
1563void
1564call (Coro::State coro, SV *coderef)
1565 ALIAS:
1566 eval = 1
1567 CODE:
1568{
1569 if (coro->mainstack)
1570 {
1571 struct coro temp;
1572 Zero (&temp, 1, struct coro);
1573 temp.save = CORO_SAVE_ALL;
1574
1575 if (!(coro->flags & CF_RUNNING))
1576 {
1577 save_perl (aTHX_ &temp);
1578 load_perl (aTHX_ coro);
1579 }
1580
1581 {
1582 dSP;
1583 ENTER;
1584 SAVETMPS;
1585 PUSHMARK (SP);
1586 PUTBACK;
1587 if (ix)
1588 eval_sv (coderef, 0);
1589 else
1590 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1591 SPAGAIN;
1592 FREETMPS;
1593 LEAVE;
1594 PUTBACK;
1595 }
1596
1597 if (!(coro->flags & CF_RUNNING))
1598 {
1599 save_perl (aTHX_ coro);
1600 load_perl (aTHX_ &temp);
1601 }
1602 }
1603}
1604
1605SV *
1606is_ready (Coro::State coro)
1607 PROTOTYPE: $
1608 ALIAS:
1609 is_ready = CF_READY
1610 is_running = CF_RUNNING
1611 is_new = CF_NEW
1612 is_destroyed = CF_DESTROYED
1613 CODE:
1614 RETVAL = boolSV (coro->flags & ix);
1615 OUTPUT:
1616 RETVAL
1617
1618void
1619api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1620
1621SV *
1622has_stack (Coro::State coro)
1623 PROTOTYPE: $
1624 CODE:
1625 RETVAL = boolSV (!!coro->cctx);
1626 OUTPUT:
1627 RETVAL
1628
1629int
1630is_traced (Coro::State coro)
1631 PROTOTYPE: $
1632 CODE:
1633 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1634 OUTPUT:
1635 RETVAL
1636
1637IV
1638rss (Coro::State coro)
1639 PROTOTYPE: $
1640 ALIAS:
1641 usecount = 1
1005 CODE: 1642 CODE:
1006 static SV *returnstk; 1643 switch (ix)
1007 SV *sv; 1644 {
1008 AV *defav = GvAV (PL_defgv); 1645 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1009 struct coro *prev, *next; 1646 case 1: RETVAL = coro->usecount; break;
1647 }
1648 OUTPUT:
1649 RETVAL
1010 1650
1011 if (!returnstk)
1012 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014 /* set up @_ -- ugly */
1015 av_clear (defav);
1016 av_fill (defav, items - 1);
1017 while (items--)
1018 av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021 sv = av_pop ((AV *)SvRV (returnstk));
1022 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024 SvREFCNT_dec (sv);
1025
1026 transfer(aTHX_ prev, next, 0);
1027 1651
1028MODULE = Coro::State PACKAGE = Coro 1652MODULE = Coro::State PACKAGE = Coro
1029 1653
1030# this is slightly dirty (should expose a c-level api)
1031
1032BOOT: 1654BOOT:
1033{ 1655{
1034 int i; 1656 int i;
1657
1658 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1659 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1660 av_async_pool = get_av ("Coro::async_pool", TRUE);
1661
1662 coro_current = get_sv ("Coro::current", FALSE);
1663 SvREADONLY_on (coro_current);
1664
1035 HV *stash = gv_stashpv ("Coro", TRUE); 1665 coro_stash = gv_stashpv ("Coro", TRUE);
1036 1666
1037 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1667 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1668 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1669 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1670 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1671 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1672 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046 1673
1047 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1674 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048 coro_ready[i] = newAV (); 1675 coro_ready[i] = newAV ();
1049 1676
1050 { 1677 {
1051 SV *sv = perl_get_sv("Coro::API", 1); 1678 SV *sv = perl_get_sv("Coro::API", 1);
1052 1679
1053 coroapi.schedule = api_schedule; 1680 coroapi.schedule = api_schedule;
1681 coroapi.save = api_save;
1054 coroapi.cede = api_cede; 1682 coroapi.cede = api_cede;
1683 coroapi.cede_notself = api_cede_notself;
1055 coroapi.ready = api_ready; 1684 coroapi.ready = api_ready;
1685 coroapi.is_ready = api_is_ready;
1056 coroapi.nready = &coro_nready; 1686 coroapi.nready = &coro_nready;
1057 coroapi.current = coro_current; 1687 coroapi.current = coro_current;
1058 1688
1059 GCoroAPI = &coroapi; 1689 GCoroAPI = &coroapi;
1060 sv_setiv(sv, (IV)&coroapi); 1690 sv_setiv (sv, (IV)&coroapi);
1061 SvREADONLY_on(sv); 1691 SvREADONLY_on (sv);
1062 } 1692 }
1063} 1693}
1064 1694
1065void 1695void
1066ready(self) 1696_set_current (SV *current)
1067 SV * self
1068 PROTOTYPE: $ 1697 PROTOTYPE: $
1069 CODE: 1698 CODE:
1070 api_ready (self); 1699 SvREFCNT_dec (SvRV (coro_current));
1700 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071 1701
1072int 1702int
1703prio (Coro::State coro, int newprio = 0)
1704 ALIAS:
1705 nice = 1
1706 CODE:
1707{
1708 RETVAL = coro->prio;
1709
1710 if (items > 1)
1711 {
1712 if (ix)
1713 newprio = coro->prio - newprio;
1714
1715 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1716 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1717
1718 coro->prio = newprio;
1719 }
1720}
1721 OUTPUT:
1722 RETVAL
1723
1724SV *
1725ready (SV *self)
1726 PROTOTYPE: $
1727 CODE:
1728 RETVAL = boolSV (api_ready (self));
1729 OUTPUT:
1730 RETVAL
1731
1732int
1073nready(...) 1733nready (...)
1074 PROTOTYPE: 1734 PROTOTYPE:
1075 CODE: 1735 CODE:
1076 RETVAL = coro_nready; 1736 RETVAL = coro_nready;
1077 OUTPUT: 1737 OUTPUT:
1078 RETVAL 1738 RETVAL
1079 1739
1740# for async_pool speedup
1080void 1741void
1081schedule(...) 1742_pool_1 (SV *cb)
1082 PROTOTYPE:
1083 CODE: 1743 CODE:
1084 api_schedule (); 1744{
1745 int i, len;
1746 HV *hv = (HV *)SvRV (coro_current);
1747 AV *defav = GvAV (PL_defgv);
1748 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1749 AV *invoke_av;
1750
1751 if (!invoke)
1752 croak ("\3terminate\2\n");
1753
1754 hv_store (hv, "desc", sizeof ("desc") - 1,
1755 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1756
1757 invoke_av = (AV *)SvRV (invoke);
1758 len = av_len (invoke_av);
1759
1760 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1761
1762 if (len > 0)
1763 {
1764 av_fill (defav, len - 1);
1765 for (i = 0; i < len; ++i)
1766 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1767 }
1768
1769 SvREFCNT_dec (invoke);
1770}
1085 1771
1086void 1772void
1087cede(...) 1773_pool_2 (SV *cb)
1088 PROTOTYPE:
1089 CODE: 1774 CODE:
1090 api_cede (); 1775{
1776 struct coro *coro = SvSTATE (coro_current);
1091 1777
1778 sv_setsv (cb, &PL_sv_undef);
1779
1780 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1781 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1782 croak ("\3terminate\2\n");
1783
1784 av_clear (GvAV (PL_defgv));
1785 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1786 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1787
1788 coro->save = CORO_SAVE_DEF;
1789 coro->prio = 0;
1790
1791 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1792 api_trace (coro_current, 0);
1793
1794 av_push (av_async_pool, newSVsv (coro_current));
1795}
1796
1797
1798MODULE = Coro::State PACKAGE = Coro::AIO
1799
1800SV *
1801_get_state ()
1802 CODE:
1803{
1804 struct io_state *data;
1805
1806 RETVAL = newSV (sizeof (struct io_state));
1807 data = (struct io_state *)SvPVX (RETVAL);
1808 SvCUR_set (RETVAL, sizeof (struct io_state));
1809 SvPOK_only (RETVAL);
1810
1811 data->errorno = errno;
1812 data->laststype = PL_laststype;
1813 data->laststatval = PL_laststatval;
1814 data->statcache = PL_statcache;
1815}
1816 OUTPUT:
1817 RETVAL
1818
1819void
1820_set_state (char *data_)
1821 PROTOTYPE: $
1822 CODE:
1823{
1824 struct io_state *data = (void *)data_;
1825
1826 errno = data->errorno;
1827 PL_laststype = data->laststype;
1828 PL_laststatval = data->laststatval;
1829 PL_statcache = data->statcache;
1830}
1831

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