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Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.167 by root, Thu Sep 27 15:52:31 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 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 PMOP *curpm;
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 /* coro process data */
205 int prio;
206
207 /* linked list */
208 struct coro *next, *prev;
209 HV *hv; /* the perl hash associated with this coro, if any */
97}; 210};
98 211
99typedef struct coro *Coro__State; 212typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 213typedef struct coro *Coro__State_or_hashref;
101 214
102static AV *main_mainstack; /* used to differentiate between $main and others */ 215/** 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 */
108 216
109/* mostly copied from op.c:cv_clone2 */ 217#define PRIO_MAX 3
110STATIC AV * 218#define PRIO_HIGH 1
111clone_padlist (AV *protopadlist) 219#define PRIO_NORMAL 0
220#define PRIO_LOW -1
221#define PRIO_IDLE -3
222#define PRIO_MIN -4
223
224/* for Coro.pm */
225static SV *coro_current;
226static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
227static int coro_nready;
228static struct coro *coro_first;
229
230/** lowlevel stuff **********************************************************/
231
232static AV *
233coro_clone_padlist (pTHX_ CV *cv)
112{ 234{
113 AV *av; 235 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; 236 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);
131 237
132 newpadlist = newAV (); 238 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 239 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 240#if PERL_VERSION_ATLEAST (5,9,0)
241 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
242#else
243 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
244#endif
245 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
246 --AvFILLp (padlist);
247
248 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135 av_store (newpadlist, 1, (SV *) newpad); 249 av_store (newpadlist, 1, (SV *)newpad);
136 250
137 av = newAV (); /* will be @_ */ 251 return newpadlist;
138 av_extend (av, 0); 252}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 253
142 for (ix = fpad; ix > 0; ix--) 254static void
255free_padlist (pTHX_ AV *padlist)
256{
257 /* may be during global destruction */
258 if (SvREFCNT (padlist))
143 { 259 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 260 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 261 while (i >= 0)
146 { 262 {
147 char *name = SvPVX (namesv); /* XXX */ 263 SV **svp = av_fetch (padlist, i--, FALSE);
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 264 if (svp)
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 } 265 {
152 else
153 { /* our own lexical */
154 SV *sv; 266 SV *sv;
155 if (*name == '&') 267 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156 sv = SvREFCNT_inc (ppad[ix]); 268 SvREFCNT_dec (sv);
157 else if (*name == '@') 269
158 sv = (SV *) newAV (); 270 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 } 271 }
167 } 272 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 273
274 SvREFCNT_dec ((SV*)padlist);
275 }
276}
277
278static int
279coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
280{
281 AV *padlist;
282 AV *av = (AV *)mg->mg_obj;
283
284 /* casting is fun. */
285 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
286 free_padlist (aTHX_ padlist);
287
288 SvREFCNT_dec (av);
289
290 return 0;
291}
292
293#define PERL_MAGIC_coro PERL_MAGIC_ext
294
295static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
296
297#define CORO_MAGIC(cv) \
298 SvMAGIC (cv) \
299 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
300 ? SvMAGIC (cv) \
301 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
302 : 0
303
304/* the next two functions merely cache the padlists */
305static void
306get_padlist (pTHX_ CV *cv)
307{
308 MAGIC *mg = CORO_MAGIC (cv);
309 AV *av;
310
311 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
312 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
313 else
314 {
315#if CORO_PREFER_PERL_FUNCTIONS
316 /* this is probably cleaner, but also slower? */
317 CV *cp = Perl_cv_clone (cv);
318 CvPADLIST (cv) = CvPADLIST (cp);
319 CvPADLIST (cp) = 0;
320 SvREFCNT_dec (cp);
321#else
322 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
323#endif
324 }
325}
326
327static void
328put_padlist (pTHX_ CV *cv)
329{
330 MAGIC *mg = CORO_MAGIC (cv);
331 AV *av;
332
333 if (!mg)
334 {
335 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
336 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
337 mg->mg_virtual = &vtbl_coro;
338 mg->mg_obj = (SV *)newAV ();
339 }
340
341 av = (AV *)mg->mg_obj;
342
343 if (AvFILLp (av) >= AvMAX (av))
344 av_extend (av, AvMAX (av) + 1);
345
346 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
347}
348
349/** load & save, init *******************************************************/
350
351#define SB do {
352#define SE } while (0)
353
354#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
355
356static void
357load_perl (pTHX_ Coro__State c)
358{
359#define VAR(name,type) PL_ ## name = c->name;
360# include "state.h"
361#undef VAR
362
363 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
364 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
365 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
366 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
367
368 if (c->irssv)
369 {
370 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
169 { 371 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]); 372 SvREFCNT_dec (c->irssv);
373 c->irssv = 0;
171 } 374 }
172 else 375 else
173 { 376 {
174 SV *sv = NEWSV (0, 0); 377 REPLACE_SV (PL_rs, c->irssv);
175 SvPADTMP_on (sv); 378 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
176 npad[ix] = sv; 379 sv_setsv (c->irssv_sv, PL_rs);
177 } 380 }
178 } 381 }
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_stack_base = c->stack_base;
297 PL_stack_max = c->stack_max;
298 PL_tmps_stack = c->tmps_stack;
299 PL_tmps_floor = c->tmps_floor;
300 PL_tmps_ix = c->tmps_ix;
301 PL_tmps_max = c->tmps_max;
302 PL_markstack = c->markstack;
303 PL_markstack_ptr = c->markstack_ptr;
304 PL_markstack_max = c->markstack_max;
305 PL_scopestack = c->scopestack;
306 PL_scopestack_ix = c->scopestack_ix;
307 PL_scopestack_max = c->scopestack_max;
308 PL_savestack = c->savestack;
309 PL_savestack_ix = c->savestack_ix;
310 PL_savestack_max = c->savestack_max;
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314 PL_curcop = c->curcop;
315 PL_top_env = c->top_env;
316
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320 382
321 { 383 {
322 dSP; 384 dSP;
323 CV *cv; 385 CV *cv;
324 386
325 /* now do the ugly restore mess */ 387 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 388 while ((cv = (CV *)POPs))
327 { 389 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 390 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 391 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 392 CvPADLIST (cv) = (AV *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 393 }
341 394
342 PUTBACK; 395 PUTBACK;
343 } 396 }
344} 397}
345 398
346static void 399static void
347save_state(pTHX_ Coro__State c, int flags) 400save_perl (pTHX_ Coro__State c)
348{ 401{
349 { 402 {
350 dSP; 403 dSP;
351 I32 cxix = cxstack_ix; 404 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 405 PERL_CONTEXT *ccstk = cxstack;
… …
355 /* 408 /*
356 * the worst thing you can imagine happens first - we have to save 409 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 410 * (and reinitialize) all cv's in the whole callchain :(
358 */ 411 */
359 412
360 PUSHs (Nullsv); 413 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 414 /* this loop was inspired by pp_caller */
362 for (;;) 415 for (;;)
363 { 416 {
364 while (cxix >= 0) 417 while (cxix >= 0)
365 { 418 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 419 PERL_CONTEXT *cx = &ccstk[cxix--];
367 420
368 if (CxTYPE(cx) == CXt_SUB) 421 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
369 { 422 {
370 CV *cv = cx->blk_sub.cv; 423 CV *cv = cx->blk_sub.cv;
424
371 if (CvDEPTH(cv)) 425 if (CvDEPTH (cv))
372 { 426 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 427 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 428 PUSHs ((SV *)CvPADLIST (cv));
429 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 430 PUSHs ((SV *)cv);
389 431
390 get_padlist (cv); /* this is a monster */ 432 CvDEPTH (cv) = 0;
433 get_padlist (aTHX_ cv);
391 } 434 }
392 } 435 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 436 }
400 437
401 if (top_si->si_type == PERLSI_MAIN) 438 if (top_si->si_type == PERLSI_MAIN)
402 break; 439 break;
403 440
404 top_si = top_si->si_prev; 441 top_si = top_si->si_prev;
405 ccstk = top_si->si_cxstack; 442 ccstk = top_si->si_cxstack;
406 cxix = top_si->si_cxix; 443 cxix = top_si->si_cxix;
407 } 444 }
408 445
409 PUTBACK; 446 PUTBACK;
410 } 447 }
411 448
412 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 449 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 450 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 451 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
452 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
453 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
415 454
416 c->dowarn = PL_dowarn; 455#define VAR(name,type)c->name = PL_ ## name;
417 c->in_eval = PL_in_eval; 456# include "state.h"
418 457#undef VAR
419 c->curstackinfo = PL_curstackinfo;
420 c->curstack = PL_curstack;
421 c->mainstack = PL_mainstack;
422 c->stack_sp = PL_stack_sp;
423 c->op = PL_op;
424 c->curpad = PL_curpad;
425 c->stack_base = PL_stack_base;
426 c->stack_max = PL_stack_max;
427 c->tmps_stack = PL_tmps_stack;
428 c->tmps_floor = PL_tmps_floor;
429 c->tmps_ix = PL_tmps_ix;
430 c->tmps_max = PL_tmps_max;
431 c->markstack = PL_markstack;
432 c->markstack_ptr = PL_markstack_ptr;
433 c->markstack_max = PL_markstack_max;
434 c->scopestack = PL_scopestack;
435 c->scopestack_ix = PL_scopestack_ix;
436 c->scopestack_max = PL_scopestack_max;
437 c->savestack = PL_savestack;
438 c->savestack_ix = PL_savestack_ix;
439 c->savestack_max = PL_savestack_max;
440 c->retstack = PL_retstack;
441 c->retstack_ix = PL_retstack_ix;
442 c->retstack_max = PL_retstack_max;
443 c->curcop = PL_curcop;
444 c->top_env = PL_top_env;
445} 458}
446 459
447/* 460/*
448 * allocate various perl stacks. This is an exact copy 461 * allocate various perl stacks. This is an exact copy
449 * of perl.c:init_stacks, except that it uses less memory 462 * of perl.c:init_stacks, except that it uses less memory
450 * on the assumption that coroutines do not usually need 463 * on the (sometimes correct) assumption that coroutines do
451 * a lot of stackspace. 464 * not usually need a lot of stackspace.
452 */ 465 */
453STATIC void 466#if CORO_PREFER_PERL_FUNCTIONS
467# define coro_init_stacks init_stacks
468#else
469static void
454coro_init_stacks (pTHX) 470coro_init_stacks (pTHX)
455{ 471{
456 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 472 PL_curstackinfo = new_stackinfo(64, 6);
457 PL_curstackinfo->si_type = PERLSI_MAIN; 473 PL_curstackinfo->si_type = PERLSI_MAIN;
458 PL_curstack = PL_curstackinfo->si_stack; 474 PL_curstack = PL_curstackinfo->si_stack;
459 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 475 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460 476
461 PL_stack_base = AvARRAY(PL_curstack); 477 PL_stack_base = AvARRAY(PL_curstack);
462 PL_stack_sp = PL_stack_base; 478 PL_stack_sp = PL_stack_base;
463 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 479 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464 480
465 New(50,PL_tmps_stack,96,SV*); 481 New(50,PL_tmps_stack,64,SV*);
466 PL_tmps_floor = -1; 482 PL_tmps_floor = -1;
467 PL_tmps_ix = -1; 483 PL_tmps_ix = -1;
468 PL_tmps_max = 96; 484 PL_tmps_max = 64;
469 485
470 New(54,PL_markstack,16,I32); 486 New(54,PL_markstack,16,I32);
471 PL_markstack_ptr = PL_markstack; 487 PL_markstack_ptr = PL_markstack;
472 PL_markstack_max = PL_markstack + 16; 488 PL_markstack_max = PL_markstack + 16;
473 489
490#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 491 SET_MARK_OFFSET;
492#endif
475 493
476 New(54,PL_scopestack,16,I32); 494 New(54,PL_scopestack,16,I32);
477 PL_scopestack_ix = 0; 495 PL_scopestack_ix = 0;
478 PL_scopestack_max = 16; 496 PL_scopestack_max = 16;
479 497
480 New(54,PL_savestack,96,ANY); 498 New(54,PL_savestack,64,ANY);
481 PL_savestack_ix = 0; 499 PL_savestack_ix = 0;
482 PL_savestack_max = 96; 500 PL_savestack_max = 64;
483 501
502#if !PERL_VERSION_ATLEAST (5,9,0)
484 New(54,PL_retstack,8,OP*); 503 New(54,PL_retstack,4,OP*);
485 PL_retstack_ix = 0; 504 PL_retstack_ix = 0;
486 PL_retstack_max = 8; 505 PL_retstack_max = 4;
506#endif
487} 507}
508#endif
488 509
489/* 510/*
490 * destroy the stacks, the callchain etc... 511 * destroy the stacks, the callchain etc...
491 * still there is a memleak of 128 bytes...
492 */ 512 */
493STATIC void 513static void
494destroy_stacks(pTHX) 514coro_destroy_stacks (pTHX)
495{ 515{
496 if (!IN_DESTRUCT) 516 if (!IN_DESTRUCT)
497 { 517 {
498 /* is this ugly, I ask? */ 518 /* restore all saved variables and stuff */
499 while (PL_scopestack_ix) 519 LEAVE_SCOPE (0);
500 LEAVE; 520 assert (PL_tmps_floor == -1);
501 521
502 /* sure it is, but more important: is it correct?? :/ */ 522 /* free all temporaries */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS; 523 FREETMPS;
524 assert (PL_tmps_ix == -1);
525
526 /* unwind all extra stacks */
527 POPSTACK_TO (PL_mainstack);
528
529 /* unwind main stack */
530 dounwind (-1);
505 } 531 }
506 532
507 while (PL_curstackinfo->si_next) 533 while (PL_curstackinfo->si_next)
508 PL_curstackinfo = PL_curstackinfo->si_next; 534 PL_curstackinfo = PL_curstackinfo->si_next;
509 535
510 while (PL_curstackinfo) 536 while (PL_curstackinfo)
511 { 537 {
512 PERL_SI *p = PL_curstackinfo->si_prev; 538 PERL_SI *p = PL_curstackinfo->si_prev;
513 539
514 {
515 dSP;
516 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517 PUTBACK; /* possibly superfluous */
518 }
519
520 if (!IN_DESTRUCT) 540 if (!IN_DESTRUCT)
521 {
522 dounwind(-1);
523 SvREFCNT_dec(PL_curstackinfo->si_stack); 541 SvREFCNT_dec (PL_curstackinfo->si_stack);
524 }
525 542
526 Safefree(PL_curstackinfo->si_cxstack); 543 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 544 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 545 PL_curstackinfo = p;
529 } 546 }
530 547
531 Safefree(PL_tmps_stack); 548 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 549 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 550 Safefree (PL_scopestack);
534 Safefree(PL_savestack); 551 Safefree (PL_savestack);
552#if !PERL_VERSION_ATLEAST (5,9,0)
535 Safefree(PL_retstack); 553 Safefree (PL_retstack);
554#endif
536} 555}
556
557static size_t
558coro_rss (struct coro *coro)
559{
560 size_t rss = sizeof (coro);
561
562 if (coro->mainstack)
563 {
564 if (coro->flags & CF_RUNNING)
565 {
566 #define VAR(name,type)coro->name = PL_ ## name;
567 # include "state.h"
568 #undef VAR
569 }
570
571 rss += sizeof (coro->curstackinfo);
572 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
573 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
574 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
575 rss += coro->tmps_max * sizeof (SV *);
576 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
577 rss += coro->scopestack_max * sizeof (I32);
578 rss += coro->savestack_max * sizeof (ANY);
579
580#if !PERL_VERSION_ATLEAST (5,9,0)
581 rss += coro->retstack_max * sizeof (OP *);
582#endif
583 }
584
585 return rss;
586}
587
588/** coroutine stack handling ************************************************/
537 589
538static void 590static void
539allocate_stack (Coro__State ctx, int alloc) 591setup_coro (pTHX_ struct coro *coro)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#if HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif
555 {
556 /*FIXME*//*D*//* reasonable stack size! */
557 stack->ssize = -4096 * sizeof (long);
558 New (0, stack->sptr, 4096, long);
559 }
560 }
561 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 {
578#ifdef HAVE_MMAP
579 if (stack->ssize > 0 && stack->sptr)
580 munmap (stack->sptr, stack->ssize);
581 else
582#else
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 }
587 else if (ctx->gencnt == stack->gencnt)
588 --stack->usecnt;
589 }
590}
591
592static void
593setup_coro (void *arg)
594{ 592{
595 /* 593 /*
596 * emulate part of the perl startup here. 594 * emulate part of the perl startup here.
597 */ 595 */
596 coro_init_stacks (aTHX);
597
598 PL_curcop = &PL_compiling;
599 PL_in_eval = EVAL_NULL;
600 PL_comppad = 0;
601 PL_curpm = 0;
602 PL_localizing = 0;
603 PL_dirty = 0;
604 PL_restartop = 0;
605
606 {
607 dSP;
608 LOGOP myop;
609
610 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = coro->args; coro->args = 0;
612
613 Zero (&myop, 1, LOGOP);
614 myop.op_next = Nullop;
615 myop.op_flags = OPf_WANT_VOID;
616
617 PUSHMARK (SP);
618 XPUSHs (av_shift (GvAV (PL_defgv)));
619 PUTBACK;
620 PL_op = (OP *)&myop;
621 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
622 SPAGAIN;
623 }
624
625 ENTER; /* necessary e.g. for dounwind */
626}
627
628static void
629free_coro_mortal (pTHX)
630{
631 if (coro_mortal)
632 {
633 SvREFCNT_dec (coro_mortal);
634 coro_mortal = 0;
635 }
636}
637
638static int
639runops_coro (pTHX)
640{
641 COP *oldcop = 0;
642 int oldcxix = -2;
643
644 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
645 {
646 PERL_ASYNC_CHECK ();
647
648 if (PL_op->op_type == OP_LEAVESUB)
649 {
650 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
651 SV **bot, **top;
652 AV *av = newAV (); /* return values */
653 runops_proc_t old_runops = PL_runops;
654 dSP;
655 ENTER;
656 SAVETMPS;
657 EXTEND (SP, 3);
658 PL_runops = RUNOPS_DEFAULT;
659
660 GV *gv = CvGV (cx->blk_sub.cv);
661 SV *fullname = sv_2mortal (newSV (0));
662 if (isGV (gv))
663 gv_efullname3 (fullname, gv, 0);
664
665 bot = PL_stack_base + cx->blk_oldsp + 1;
666 top = cx->blk_gimme == G_ARRAY ? SP + 1
667 : cx->blk_gimme == G_SCALAR ? bot + 1
668 : bot;
669
670 while (bot < top)
671 av_push (av, SvREFCNT_inc (*bot++));
672
673 PUSHMARK (SP);
674 PUSHs (&PL_sv_no);
675 PUSHs (fullname);
676 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
677 PUTBACK;
678 call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
679 SPAGAIN;
680
681 FREETMPS;
682 LEAVE;
683 PL_runops = old_runops;
684 }
685
686 if (oldcop != PL_curcop)
687 {
688 oldcop = PL_curcop;
689
690 if (PL_curcop != &PL_compiling)
691 {
692 runops_proc_t old_runops = PL_runops;
693 dSP;
694 ENTER;
695 SAVETMPS;
696 EXTEND (SP, 3);
697 PL_runops = RUNOPS_DEFAULT;
698
699 if (oldcxix != cxstack_ix)
700 {
701 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
702
703 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
704 {
705 GV *gv = CvGV (cx->blk_sub.cv);
706 SV *fullname = sv_2mortal (newSV (0));
707 if (isGV (gv))
708 gv_efullname3 (fullname, gv, 0);
709
710 PUSHMARK (SP);
711 PUSHs (&PL_sv_yes);
712 PUSHs (fullname);
713 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
714 PUTBACK;
715 call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
716 SPAGAIN;
717 }
718
719 oldcxix = cxstack_ix;
720 }
721
722 if (0) {
723 PUSHMARK (SP);
724 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
725 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
726 PUTBACK;
727 call_pv ("Coro::_do_trace_line", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
728 SPAGAIN;
729 }
730
731 FREETMPS;
732 LEAVE;
733 PL_runops = old_runops;
734 }
735 }
736 }
737
738 TAINT_NOT;
739 return 0;
740}
741
742/* inject a fake call to Coro::State::_cctx_init into the execution */
743/* _cctx_init should be careful, as it could be called at almost any time */
744/* during execution of a perl program */
745static void NOINLINE
746prepare_cctx (pTHX_ coro_cctx *cctx)
747{
598 dSP; 748 dSP;
599 Coro__State ctx = (Coro__State)arg; 749 LOGOP myop;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601 750
602 coro_init_stacks (aTHX); 751 PL_top_env = &PL_start_env;
603 PL_curpm = 0; /* segfault on first access */
604 /*PL_curcop = 0;*/
605 /*PL_in_eval = PL_in_eval;*/ /* inherit */
606 SvREFCNT_dec (GvAV (PL_defgv));
607 GvAV (PL_defgv) = ctx->args;
608 752
753 if (cctx->flags & CC_TRACE)
754 PL_runops = runops_coro;
755
756 Zero (&myop, 1, LOGOP);
757 myop.op_next = PL_op;
758 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
759
760 PUSHMARK (SP);
761 EXTEND (SP, 2);
762 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
763 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
764 PUTBACK;
765 PL_op = (OP *)&myop;
766 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609 SPAGAIN; 767 SPAGAIN;
768}
610 769
611 if (ctx->stack) 770/*
612 { 771 * this is a _very_ stripped down perl interpreter ;)
613 ctx->cursp = 0; 772 */
773static void
774coro_run (void *arg)
775{
776 dTHX;
614 777
615 PUSHMARK(SP); 778 /* coro_run is the alternative tail of transfer(), so unlock here. */
616 PUTBACK; 779 UNLOCK;
617 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
618 780
619 if (SvTRUE (ERRSV)) 781 /* we now skip the entersub that lead to transfer() */
620 croak (NULL); 782 PL_op = PL_op->op_next;
621 else 783
622 croak ("FATAL: CCTXT coroutine returned!"); 784 /* inject a fake subroutine call to cctx_init */
785 prepare_cctx (aTHX_ (coro_cctx *)arg);
786
787 /* somebody or something will hit me for both perl_run and PL_restartop */
788 PL_restartop = PL_op;
789 perl_run (PL_curinterp);
790
791 /*
792 * If perl-run returns we assume exit() was being called or the coro
793 * fell off the end, which seems to be the only valid (non-bug)
794 * reason for perl_run to return. We try to exit by jumping to the
795 * bootstrap-time "top" top_env, as we cannot restore the "main"
796 * coroutine as Coro has no such concept
797 */
798 PL_top_env = main_top_env;
799 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
800}
801
802static coro_cctx *
803cctx_new ()
804{
805 coro_cctx *cctx;
806 void *stack_start;
807 size_t stack_size;
808
809 ++cctx_count;
810
811 Newz (0, cctx, 1, coro_cctx);
812
813#if HAVE_MMAP
814
815 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
816 /* mmap supposedly does allocate-on-write for us */
817 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
818
819 if (cctx->sptr != (void *)-1)
820 {
821# if CORO_STACKGUARD
822 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
823# endif
824 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
825 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
826 cctx->flags |= CC_MAPPED;
623 } 827 }
624 else 828 else
625 { 829#endif
626 UNOP myop;
627
628 PL_op = (OP *)&myop;
629
630 Zero(&myop, 1, UNOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK(SP);
635 XPUSHs (sub_init);
636 /*
637 * the next line is slightly wrong, as PL_op->op_next
638 * is actually being executed so we skip the first op.
639 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;)
642 */
643 PUTBACK;
644 PL_op = pp_entersub();
645 SPAGAIN;
646
647 ENTER; /* necessary e.g. for dounwind */
648 } 830 {
831 cctx->ssize = coro_stacksize * (long)sizeof (long);
832 New (0, cctx->sptr, coro_stacksize, long);
833
834 if (!cctx->sptr)
835 {
836 perror ("FATAL: unable to allocate stack for coroutine");
837 _exit (EXIT_FAILURE);
838 }
839
840 stack_start = cctx->sptr;
841 stack_size = cctx->ssize;
842 }
843
844 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
845 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
846
847 return cctx;
649} 848}
650 849
651static void 850static void
652continue_coro (void *arg) 851cctx_destroy (coro_cctx *cctx)
653{ 852{
654 /* 853 if (!cctx)
655 * this is a _very_ stripped down perl interpreter ;) 854 return;
656 */
657 Coro__State ctx = (Coro__State)arg;
658 JMPENV coro_start_env;
659 855
660 /* same as JMPENV_BOOTSTRAP */ 856 --cctx_count;
661 Zero(&coro_start_env, 1, JMPENV);
662 coro_start_env.je_ret = -1;
663 coro_start_env.je_mustcatch = TRUE;
664 PL_top_env = &coro_start_env;
665 857
666 ctx->cursp = 0; 858#if CORO_USE_VALGRIND
667 PL_op = PL_op->op_next; 859 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
668 CALLRUNOPS(aTHX); 860#endif
669 861
670 abort (); 862#if HAVE_MMAP
671} 863 if (cctx->flags & CC_MAPPED)
864 munmap (cctx->sptr, cctx->ssize);
865 else
866#endif
867 Safefree (cctx->sptr);
672 868
673STATIC void 869 Safefree (cctx);
870}
871
872static coro_cctx *
873cctx_get (pTHX)
874{
875 while (cctx_first)
876 {
877 coro_cctx *cctx = cctx_first;
878 cctx_first = cctx->next;
879 --cctx_idle;
880
881 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
882 return cctx;
883
884 cctx_destroy (cctx);
885 }
886
887 return cctx_new ();
888}
889
890static void
891cctx_put (coro_cctx *cctx)
892{
893 /* free another cctx if overlimit */
894 if (cctx_idle >= MAX_IDLE_CCTX)
895 {
896 coro_cctx *first = cctx_first;
897 cctx_first = first->next;
898 --cctx_idle;
899
900 cctx_destroy (first);
901 }
902
903 ++cctx_idle;
904 cctx->next = cctx_first;
905 cctx_first = cctx;
906}
907
908/** coroutine switching *****************************************************/
909
910/* never call directly, always through the coro_state_transfer global variable */
911static void NOINLINE
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 912transfer (pTHX_ struct coro *prev, struct coro *next)
675{ 913{
676 dSTACKLEVEL; 914 dSTACKLEVEL;
677 static struct coro *xnext;
678 915
916 /* sometimes transfer is only called to set idle_sp */
917 if (!next)
918 {
919 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
920 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
921 }
679 if (prev != next) 922 else if (prev != next)
680 { 923 {
681 xnext = next; 924 coro_cctx *prev__cctx;
682 925
683 if (next->mainstack) 926 if (prev->flags & CF_NEW)
684 { 927 {
685 SAVE (prev, flags); 928 /* create a new empty context */
686 LOAD (next); 929 Newz (0, prev->cctx, 1, coro_cctx);
687 930 prev->flags &= ~CF_NEW;
688 /* mark this state as in-use */ 931 prev->flags |= CF_RUNNING;
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 {
695 if (!prev->stack)
696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
716 }
717
718 } 932 }
719 else if (next->tmps_ix == -2) 933
720 croak ("tried to transfer to running coroutine"); 934 /*TODO: must not croak here */
935 if (!prev->flags & CF_RUNNING)
936 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
937
938 if (next->flags & CF_RUNNING)
939 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
940
941 if (next->flags & CF_DESTROYED)
942 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
943
944 prev->flags &= ~CF_RUNNING;
945 next->flags |= CF_RUNNING;
946
947 LOCK;
948
949 if (next->flags & CF_NEW)
950 {
951 /* need to start coroutine */
952 next->flags &= ~CF_NEW;
953 /* first get rid of the old state */
954 save_perl (aTHX_ prev);
955 /* setup coroutine call */
956 setup_coro (aTHX_ next);
957 }
721 else 958 else
722 { 959 {
723 SAVE (prev, -1); /* first get rid of the old state */ 960 /* coroutine already started */
724 961 save_perl (aTHX_ prev);
725 if (flags & TRANSFER_SAVE_CCTXT) 962 load_perl (aTHX_ next);
726 {
727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731 {
732 setup_coro (next);
733
734 prev->stack->refcnt++;
735 prev->stack->usecnt++;
736 next->stack = prev->stack;
737 next->gencnt = prev->gencnt;
738 }
739 else
740 {
741 allocate_stack (next, 1);
742 coro_create (&(next->stack->cctx),
743 setup_coro, (void *)next,
744 next->stack->sptr, labs (next->stack->ssize));
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746 /* don't add any code here */
747 }
748 }
749 else
750 setup_coro (next);
751 } 963 }
752 964
753 /* 965 prev__cctx = prev->cctx;
754 * xnext is now either prev or next, depending on wether 966
755 * we switched the c stack or not. that's why i use a global 967 /* possibly "free" the cctx */
756 * variable, that should become thread-specific at one point. 968 if (prev__cctx->idle_sp == STACKLEVEL)
757 */ 969 {
758 xnext->cursp = stacklevel; 970 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
759 } 971 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
760 972
761 if (coro_mortal) 973 prev->cctx = 0;
974
975 cctx_put (prev__cctx);
976 }
977
978 if (!next->cctx)
979 next->cctx = cctx_get (aTHX);
980
981 if (prev__cctx != next->cctx)
982 {
983 prev__cctx->top_env = PL_top_env;
984 PL_top_env = next->cctx->top_env;
985 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
986 }
987
988 free_coro_mortal (aTHX);
989 UNLOCK;
762 { 990 }
763 SvREFCNT_dec (coro_mortal); 991}
764 coro_mortal = 0; 992
993struct transfer_args
994{
995 struct coro *prev, *next;
996};
997
998#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
999
1000/** high level stuff ********************************************************/
1001
1002static int
1003coro_state_destroy (pTHX_ struct coro *coro)
1004{
1005 if (coro->flags & CF_DESTROYED)
1006 return 0;
1007
1008 coro->flags |= CF_DESTROYED;
1009
1010 if (coro->flags & CF_READY)
765 } 1011 {
766} 1012 /* reduce nready, as destroying a ready coro effectively unreadies it */
1013 /* alternative: look through all ready queues and remove the coro */
1014 LOCK;
1015 --coro_nready;
1016 UNLOCK;
1017 }
1018 else
1019 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
767 1020
768#define SV_CORO(sv,func) \ 1021 if (coro->mainstack && coro->mainstack != main_mainstack)
769 do { \ 1022 {
770 if (SvROK (sv)) \ 1023 struct coro temp;
771 sv = SvRV (sv); \
772 \
773 if (SvTYPE(sv) == SVt_PVHV) \
774 { \
775 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
776 \
777 if (!he) \
778 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
779 \
780 (sv) = SvRV (HeVAL(he)); \
781 } \
782 \
783 /* must also be changed inside Coro::Cont::yield */ \
784 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
785 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
786 \
787 } while(0)
788 1024
789#define SvSTATE(sv) (struct coro *)SvIV (sv) 1025 assert (!(coro->flags & CF_RUNNING));
1026
1027 Zero (&temp, 1, struct coro);
1028 temp.save = CORO_SAVE_ALL;
1029
1030 if (coro->flags & CF_RUNNING)
1031 croak ("FATAL: tried to destroy currently running coroutine");
1032
1033 save_perl (aTHX_ &temp);
1034 load_perl (aTHX_ coro);
1035
1036 coro_destroy_stacks (aTHX);
1037
1038 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1039
1040 coro->mainstack = 0;
1041 }
1042
1043 cctx_destroy (coro->cctx);
1044 SvREFCNT_dec (coro->args);
1045
1046 if (coro->next) coro->next->prev = coro->prev;
1047 if (coro->prev) coro->prev->next = coro->next;
1048 if (coro == coro_first) coro_first = coro->next;
1049
1050 return 1;
1051}
1052
1053static int
1054coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1055{
1056 struct coro *coro = (struct coro *)mg->mg_ptr;
1057 mg->mg_ptr = 0;
1058
1059 coro->hv = 0;
1060
1061 if (--coro->refcnt < 0)
1062 {
1063 coro_state_destroy (aTHX_ coro);
1064 Safefree (coro);
1065 }
1066
1067 return 0;
1068}
1069
1070static int
1071coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1072{
1073 struct coro *coro = (struct coro *)mg->mg_ptr;
1074
1075 ++coro->refcnt;
1076
1077 return 0;
1078}
1079
1080static MGVTBL coro_state_vtbl = {
1081 0, 0, 0, 0,
1082 coro_state_free,
1083 0,
1084#ifdef MGf_DUP
1085 coro_state_dup,
1086#else
1087# define MGf_DUP 0
1088#endif
1089};
1090
1091static struct coro *
1092SvSTATE_ (pTHX_ SV *coro)
1093{
1094 HV *stash;
1095 MAGIC *mg;
1096
1097 if (SvROK (coro))
1098 coro = SvRV (coro);
1099
1100 stash = SvSTASH (coro);
1101 if (stash != coro_stash && stash != coro_state_stash)
1102 {
1103 /* very slow, but rare, check */
1104 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
1105 croak ("Coro::State object required");
1106 }
1107
1108 mg = CORO_MAGIC (coro);
1109 return (struct coro *)mg->mg_ptr;
1110}
1111
1112#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
790 1113
791static void 1114static void
1115prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1116{
1117 ta->prev = SvSTATE (prev_sv);
1118 ta->next = SvSTATE (next_sv);
1119}
1120
1121static void
792api_transfer(pTHX_ SV *prev, SV *next, int flags) 1122api_transfer (SV *prev_sv, SV *next_sv)
793{ 1123{
794 SV_CORO (prev, "Coro::transfer"); 1124 dTHX;
795 SV_CORO (next, "Coro::transfer"); 1125 struct transfer_args ta;
796 1126
797 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 1127 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1128 TRANSFER (ta);
1129}
1130
1131static int
1132api_save (SV *coro_sv, int new_save)
1133{
1134 dTHX;
1135 struct coro *coro = SvSTATE (coro_sv);
1136 int old_save = coro->save;
1137
1138 if (new_save >= 0)
1139 coro->save = new_save;
1140
1141 return old_save;
798} 1142}
799 1143
800/** Coro ********************************************************************/ 1144/** Coro ********************************************************************/
801 1145
802#define PRIO_MAX 3
803#define PRIO_HIGH 1
804#define PRIO_NORMAL 0
805#define PRIO_LOW -1
806#define PRIO_IDLE -3
807#define PRIO_MIN -4
808
809/* for Coro.pm */
810static GV *coro_current, *coro_idle;
811static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
812static int coro_nready;
813
814static void 1146static void
815coro_enq (SV *sv) 1147coro_enq (pTHX_ SV *coro_sv)
816{ 1148{
817 if (SvTYPE (sv) == SVt_PVHV)
818 {
819 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
820 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
821
822 prio = prio > PRIO_MAX ? PRIO_MAX
823 : prio < PRIO_MIN ? PRIO_MIN
824 : prio;
825
826 av_push (coro_ready [prio - PRIO_MIN], sv); 1149 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827 coro_nready++;
828
829 return;
830 }
831
832 croak ("Coro::ready tried to enqueue something that is not a coroutine");
833} 1150}
834 1151
835static SV * 1152static SV *
836coro_deq (int min_prio) 1153coro_deq (pTHX_ int min_prio)
837{ 1154{
838 int prio = PRIO_MAX - PRIO_MIN; 1155 int prio = PRIO_MAX - PRIO_MIN;
839 1156
840 min_prio -= PRIO_MIN; 1157 min_prio -= PRIO_MIN;
841 if (min_prio < 0) 1158 if (min_prio < 0)
842 min_prio = 0; 1159 min_prio = 0;
843 1160
844 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1161 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
845 if (av_len (coro_ready[prio]) >= 0) 1162 if (AvFILLp (coro_ready [prio]) >= 0)
846 {
847 coro_nready--;
848 return av_shift (coro_ready[prio]); 1163 return av_shift (coro_ready [prio]);
849 }
850 1164
851 return 0; 1165 return 0;
852} 1166}
853 1167
1168static int
1169api_ready (SV *coro_sv)
1170{
1171 dTHX;
1172 struct coro *coro;
1173
1174 if (SvROK (coro_sv))
1175 coro_sv = SvRV (coro_sv);
1176
1177 coro = SvSTATE (coro_sv);
1178
1179 if (coro->flags & CF_READY)
1180 return 0;
1181
1182 coro->flags |= CF_READY;
1183
1184 LOCK;
1185 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1186 ++coro_nready;
1187 UNLOCK;
1188
1189 return 1;
1190}
1191
1192static int
1193api_is_ready (SV *coro_sv)
1194{
1195 dTHX;
1196 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1197}
1198
854static void 1199static void
855api_ready (SV *coro) 1200prepare_schedule (pTHX_ struct transfer_args *ta)
856{ 1201{
857 if (SvROK (coro)) 1202 SV *prev_sv, *next_sv;
858 coro = SvRV (coro);
859 1203
860 coro_enq (SvREFCNT_inc (coro)); 1204 for (;;)
1205 {
1206 LOCK;
1207 next_sv = coro_deq (aTHX_ PRIO_MIN);
1208
1209 /* nothing to schedule: call the idle handler */
1210 if (!next_sv)
1211 {
1212 dSP;
1213 UNLOCK;
1214
1215 ENTER;
1216 SAVETMPS;
1217
1218 PUSHMARK (SP);
1219 PUTBACK;
1220 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1221
1222 FREETMPS;
1223 LEAVE;
1224 continue;
1225 }
1226
1227 ta->next = SvSTATE (next_sv);
1228
1229 /* cannot transfer to destroyed coros, skip and look for next */
1230 if (ta->next->flags & CF_DESTROYED)
1231 {
1232 UNLOCK;
1233 SvREFCNT_dec (next_sv);
1234 /* coro_nready is already taken care of by destroy */
1235 continue;
1236 }
1237
1238 --coro_nready;
1239 UNLOCK;
1240 break;
1241 }
1242
1243 /* free this only after the transfer */
1244 prev_sv = SvRV (coro_current);
1245 SvRV_set (coro_current, next_sv);
1246 ta->prev = SvSTATE (prev_sv);
1247
1248 assert (ta->next->flags & CF_READY);
1249 ta->next->flags &= ~CF_READY;
1250
1251 LOCK;
1252 free_coro_mortal (aTHX);
1253 coro_mortal = prev_sv;
1254 UNLOCK;
1255}
1256
1257static void
1258prepare_cede (pTHX_ struct transfer_args *ta)
1259{
1260 api_ready (coro_current);
1261 prepare_schedule (aTHX_ ta);
1262}
1263
1264static int
1265prepare_cede_notself (pTHX_ struct transfer_args *ta)
1266{
1267 if (coro_nready)
1268 {
1269 SV *prev = SvRV (coro_current);
1270 prepare_schedule (aTHX_ ta);
1271 api_ready (prev);
1272 return 1;
1273 }
1274 else
1275 return 0;
861} 1276}
862 1277
863static void 1278static void
864api_schedule (void) 1279api_schedule (void)
865{ 1280{
866 SV *prev, *next; 1281 dTHX;
1282 struct transfer_args ta;
867 1283
868 prev = SvRV (GvSV (coro_current)); 1284 prepare_schedule (aTHX_ &ta);
869 next = coro_deq (PRIO_MIN); 1285 TRANSFER (ta);
870
871 if (!next)
872 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
873
874 /* free this only after the transfer */
875 coro_mortal = prev;
876 SV_CORO (prev, "Coro::schedule");
877
878 SvRV (GvSV (coro_current)) = next;
879
880 SV_CORO (next, "Coro::schedule");
881
882 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
883 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
884} 1286}
885 1287
886static void 1288static int
887api_cede (void) 1289api_cede (void)
888{ 1290{
889 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1291 dTHX;
1292 struct transfer_args ta;
890 1293
891 api_schedule (); 1294 prepare_cede (aTHX_ &ta);
1295
1296 if (ta.prev != ta.next)
1297 {
1298 TRANSFER (ta);
1299 return 1;
1300 }
1301 else
1302 return 0;
1303}
1304
1305static int
1306api_cede_notself (void)
1307{
1308 dTHX;
1309 struct transfer_args ta;
1310
1311 if (prepare_cede_notself (aTHX_ &ta))
1312 {
1313 TRANSFER (ta);
1314 return 1;
1315 }
1316 else
1317 return 0;
892} 1318}
893 1319
894MODULE = Coro::State PACKAGE = Coro::State 1320MODULE = Coro::State PACKAGE = Coro::State
895 1321
896PROTOTYPES: ENABLE 1322PROTOTYPES: DISABLE
897 1323
898BOOT: 1324BOOT:
899{ /* {} necessary for stoopid perl-5.6.x */ 1325{
900 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1326#ifdef USE_ITHREADS
901 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1327 MUTEX_INIT (&coro_mutex);
1328#endif
1329 BOOT_PAGESIZE;
1330
902 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1331 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
903 1332
1333 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1334 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1335 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1336 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1337
904 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1338 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
905 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1339 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
906 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1340 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
907 newCONSTSUB (coro_state_stash, "SAVE_CURPM", newSViv (TRANSFER_SAVE_CURPM)); 1341 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1342 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
908 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1343 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
909 1344 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
910 if (!padlist_cache)
911 padlist_cache = newHV ();
912 1345
913 main_mainstack = PL_mainstack; 1346 main_mainstack = PL_mainstack;
1347 main_top_env = PL_top_env;
1348
1349 while (main_top_env->je_prev)
1350 main_top_env = main_top_env->je_prev;
914 1351
915 coroapi.ver = CORO_API_VERSION; 1352 coroapi.ver = CORO_API_VERSION;
916 coroapi.transfer = api_transfer; 1353 coroapi.transfer = api_transfer;
917}
918 1354
919Coro::State 1355 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920_newprocess(args) 1356}
921 SV * args 1357
922 PROTOTYPE: $ 1358SV *
1359new (char *klass, ...)
923 CODE: 1360 CODE:
924 Coro__State coro; 1361{
1362 struct coro *coro;
1363 HV *hv;
1364 int i;
925 1365
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); 1366 Newz (0, coro, 1, struct coro);
1367 coro->args = newAV ();
1368 coro->save = CORO_SAVE_DEF;
1369 coro->flags = CF_NEW;
930 1370
931 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1371 if (coro_first) coro_first->prev = coro;
932 coro->mainstack = 0; /* actual work is done inside transfer */ 1372 coro->next = coro_first;
933 coro->stack = 0; 1373 coro_first = coro;
934 1374
935 RETVAL = coro; 1375 coro->hv = hv = newHV ();
1376 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1377 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1378
1379 for (i = 1; i < items; i++)
1380 av_push (coro->args, newSVsv (ST (i)));
1381}
936 OUTPUT: 1382 OUTPUT:
937 RETVAL 1383 RETVAL
938 1384
1385int
1386save (SV *coro, int new_save = -1)
1387 CODE:
1388 RETVAL = api_save (coro, new_save);
1389 OUTPUT:
1390 RETVAL
1391
1392int
1393save_also (SV *coro_sv, int save_also)
1394 CODE:
1395{
1396 struct coro *coro = SvSTATE (coro_sv);
1397 RETVAL = coro->save;
1398 coro->save |= save_also;
1399}
1400 OUTPUT:
1401 RETVAL
1402
939void 1403void
940transfer(prev, next, flags) 1404_set_stacklevel (...)
941 SV *prev 1405 ALIAS:
942 SV *next 1406 Coro::State::transfer = 1
943 int flags 1407 Coro::schedule = 2
944 PROTOTYPE: @ 1408 Coro::cede = 3
1409 Coro::cede_notself = 4
945 CODE: 1410 CODE:
946 PUTBACK; 1411{
947 SV_CORO (next, "Coro::transfer"); 1412 struct transfer_args ta;
948 SV_CORO (prev, "Coro::transfer"); 1413
949 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1414 switch (ix)
950 SPAGAIN; 1415 {
1416 case 0:
1417 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1418 ta.next = 0;
1419 break;
1420
1421 case 1:
1422 if (items != 2)
1423 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1424
1425 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1426 break;
1427
1428 case 2:
1429 prepare_schedule (aTHX_ &ta);
1430 break;
1431
1432 case 3:
1433 prepare_cede (aTHX_ &ta);
1434 break;
1435
1436 case 4:
1437 if (!prepare_cede_notself (aTHX_ &ta))
1438 XSRETURN_EMPTY;
1439
1440 break;
1441 }
1442
1443 BARRIER;
1444 TRANSFER (ta);
1445
1446 if (GIMME_V != G_VOID && ta.next != ta.prev)
1447 XSRETURN_YES;
1448}
1449
1450bool
1451_destroy (SV *coro_sv)
1452 CODE:
1453 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1454 OUTPUT:
1455 RETVAL
951 1456
952void 1457void
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) 1458_exit (code)
987 int code 1459 int code
988 PROTOTYPE: $ 1460 PROTOTYPE: $
989 CODE: 1461 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE
991 _exit (code); 1462 _exit (code);
992#else
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997 1463
998MODULE = Coro::State PACKAGE = Coro::Cont 1464int
1465cctx_stacksize (int new_stacksize = 0)
1466 CODE:
1467 RETVAL = coro_stacksize;
1468 if (new_stacksize)
1469 coro_stacksize = new_stacksize;
1470 OUTPUT:
1471 RETVAL
999 1472
1000# this is slightly dirty (should expose a c-level api) 1473int
1474cctx_count ()
1475 CODE:
1476 RETVAL = cctx_count;
1477 OUTPUT:
1478 RETVAL
1479
1480int
1481cctx_idle ()
1482 CODE:
1483 RETVAL = cctx_idle;
1484 OUTPUT:
1485 RETVAL
1001 1486
1002void 1487void
1003yield(...) 1488list ()
1004 PROTOTYPE: @ 1489 PPCODE:
1490{
1491 struct coro *coro;
1492 for (coro = coro_first; coro; coro = coro->next)
1493 if (coro->hv)
1494 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1495}
1496
1497void
1498call (Coro::State coro, SV *coderef)
1499 ALIAS:
1500 eval = 1
1501 CODE:
1502{
1503 if (coro->mainstack)
1504 {
1505 struct coro temp;
1506 Zero (&temp, 1, struct coro);
1507 temp.save = CORO_SAVE_ALL;
1508
1509 if (!(coro->flags & CF_RUNNING))
1510 {
1511 save_perl (aTHX_ &temp);
1512 load_perl (aTHX_ coro);
1513 }
1514
1515 {
1516 dSP;
1517 ENTER;
1518 SAVETMPS;
1519 PUSHMARK (SP);
1520 PUTBACK;
1521 if (ix)
1522 eval_sv (coderef, 0);
1523 else
1524 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1525 SPAGAIN;
1526 FREETMPS;
1527 LEAVE;
1528 PUTBACK;
1529 }
1530
1531 if (!(coro->flags & CF_RUNNING))
1532 {
1533 save_perl (aTHX_ coro);
1534 load_perl (aTHX_ &temp);
1535 }
1536 }
1537}
1538
1539SV *
1540is_ready (Coro::State coro)
1541 PROTOTYPE: $
1542 ALIAS:
1543 is_ready = CF_READY
1544 is_running = CF_RUNNING
1545 is_new = CF_NEW
1546 is_destroyed = CF_DESTROYED
1547 CODE:
1548 RETVAL = boolSV (coro->flags & ix);
1549 OUTPUT:
1550 RETVAL
1551
1552void
1553trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
1554 CODE:
1555 if (flags & CC_TRACE)
1556 {
1557 if (!coro->cctx)
1558 coro->cctx = cctx_new ();
1559 else if (!(coro->cctx->flags & CC_TRACE))
1560 croak ("cannot enable tracing on coroutine with custom stack");
1561
1562 coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
1563 }
1564 else
1565 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1566 {
1567 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1568 coro->cctx->flags |= CC_NOREUSE;
1569 }
1570
1571SV *
1572has_stack (Coro::State coro)
1573 PROTOTYPE: $
1574 CODE:
1575 RETVAL = boolSV (!!coro->cctx);
1576 OUTPUT:
1577 RETVAL
1578
1579int
1580is_traced (Coro::State coro)
1581 PROTOTYPE: $
1582 CODE:
1583 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1584 OUTPUT:
1585 RETVAL
1586
1587IV
1588rss (Coro::State coro)
1589 PROTOTYPE: $
1005 CODE: 1590 CODE:
1006 static SV *returnstk; 1591 RETVAL = coro_rss (coro);
1007 SV *sv; 1592 OUTPUT:
1008 AV *defav = GvAV (PL_defgv); 1593 RETVAL
1009 struct coro *prev, *next;
1010 1594
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 1595
1028MODULE = Coro::State PACKAGE = Coro 1596MODULE = Coro::State PACKAGE = Coro
1029 1597
1030# this is slightly dirty (should expose a c-level api)
1031
1032BOOT: 1598BOOT:
1033{ 1599{
1034 int i; 1600 int i;
1601
1602 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1603 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1604 av_async_pool = get_av ("Coro::async_pool", TRUE);
1605
1606 coro_current = get_sv ("Coro::current", FALSE);
1607 SvREADONLY_on (coro_current);
1608
1035 HV *stash = gv_stashpv ("Coro", TRUE); 1609 coro_stash = gv_stashpv ("Coro", TRUE);
1036 1610
1037 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1611 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1612 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1613 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1614 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1615 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1616 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 1617
1047 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1618 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048 coro_ready[i] = newAV (); 1619 coro_ready[i] = newAV ();
1049 1620
1050 { 1621 {
1051 SV *sv = perl_get_sv("Coro::API", 1); 1622 SV *sv = perl_get_sv("Coro::API", 1);
1052 1623
1053 coroapi.schedule = api_schedule; 1624 coroapi.schedule = api_schedule;
1625 coroapi.save = api_save;
1054 coroapi.cede = api_cede; 1626 coroapi.cede = api_cede;
1627 coroapi.cede_notself = api_cede_notself;
1055 coroapi.ready = api_ready; 1628 coroapi.ready = api_ready;
1629 coroapi.is_ready = api_is_ready;
1056 coroapi.nready = &coro_nready; 1630 coroapi.nready = &coro_nready;
1057 coroapi.current = coro_current; 1631 coroapi.current = coro_current;
1058 1632
1059 GCoroAPI = &coroapi; 1633 GCoroAPI = &coroapi;
1060 sv_setiv(sv, (IV)&coroapi); 1634 sv_setiv (sv, (IV)&coroapi);
1061 SvREADONLY_on(sv); 1635 SvREADONLY_on (sv);
1062 } 1636 }
1063} 1637}
1064 1638
1065void 1639void
1066ready(self) 1640_set_current (SV *current)
1067 SV * self
1068 PROTOTYPE: $ 1641 PROTOTYPE: $
1069 CODE: 1642 CODE:
1070 api_ready (self); 1643 SvREFCNT_dec (SvRV (coro_current));
1644 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071 1645
1072int 1646int
1647prio (Coro::State coro, int newprio = 0)
1648 ALIAS:
1649 nice = 1
1650 CODE:
1651{
1652 RETVAL = coro->prio;
1653
1654 if (items > 1)
1655 {
1656 if (ix)
1657 newprio = coro->prio - newprio;
1658
1659 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1660 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1661
1662 coro->prio = newprio;
1663 }
1664}
1665 OUTPUT:
1666 RETVAL
1667
1668SV *
1669ready (SV *self)
1670 PROTOTYPE: $
1671 CODE:
1672 RETVAL = boolSV (api_ready (self));
1673 OUTPUT:
1674 RETVAL
1675
1676int
1073nready(...) 1677nready (...)
1074 PROTOTYPE: 1678 PROTOTYPE:
1075 CODE: 1679 CODE:
1076 RETVAL = coro_nready; 1680 RETVAL = coro_nready;
1077 OUTPUT: 1681 OUTPUT:
1078 RETVAL 1682 RETVAL
1079 1683
1684# for async_pool speedup
1080void 1685void
1081schedule(...) 1686_pool_1 (SV *cb)
1082 PROTOTYPE:
1083 CODE: 1687 CODE:
1084 api_schedule (); 1688{
1689 int i, len;
1690 HV *hv = (HV *)SvRV (coro_current);
1691 AV *defav = GvAV (PL_defgv);
1692 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1693 AV *invoke_av;
1694
1695 if (!invoke)
1696 croak ("\3terminate\2\n");
1697
1698 hv_store (hv, "desc", sizeof ("desc") - 1,
1699 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1700
1701 invoke_av = (AV *)SvRV (invoke);
1702 len = av_len (invoke_av);
1703
1704 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1705
1706 if (len > 0)
1707 {
1708 av_fill (defav, len - 1);
1709 for (i = 0; i < len; ++i)
1710 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1711 }
1712
1713 SvREFCNT_dec (invoke);
1714}
1085 1715
1086void 1716void
1087cede(...) 1717_pool_2 (SV *cb)
1088 PROTOTYPE:
1089 CODE: 1718 CODE:
1090 api_cede (); 1719{
1720 struct coro *coro = SvSTATE (coro_current);
1091 1721
1722 sv_setsv (cb, &PL_sv_undef);
1723
1724 if (coro_rss (coro) > SvIV (sv_pool_rss)
1725 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1726 croak ("\3terminate\2\n");
1727
1728 av_clear (GvAV (PL_defgv));
1729 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1730 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1731 coro->save = CORO_SAVE_DEF;
1732 coro->prio = 0;
1733 av_push (av_async_pool, newSVsv (coro_current));
1734}
1735
1736
1737MODULE = Coro::State PACKAGE = Coro::AIO
1738
1739SV *
1740_get_state ()
1741 CODE:
1742{
1743 struct io_state *data;
1744
1745 RETVAL = newSV (sizeof (struct io_state));
1746 data = (struct io_state *)SvPVX (RETVAL);
1747 SvCUR_set (RETVAL, sizeof (struct io_state));
1748 SvPOK_only (RETVAL);
1749
1750 data->errorno = errno;
1751 data->laststype = PL_laststype;
1752 data->laststatval = PL_laststatval;
1753 data->statcache = PL_statcache;
1754}
1755 OUTPUT:
1756 RETVAL
1757
1758void
1759_set_state (char *data_)
1760 PROTOTYPE: $
1761 CODE:
1762{
1763 struct io_state *data = (void *)data_;
1764
1765 errno = data->errorno;
1766 PL_laststype = data->laststype;
1767 PL_laststatval = data->laststatval;
1768 PL_statcache = data->statcache;
1769}
1770

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