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Comparing Coro/Coro/State.xs (file contents):
Revision 1.65 by root, Mon Dec 5 23:50:48 2005 UTC vs.
Revision 1.326 by root, Mon Nov 24 04:56:38 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <signal.h> 83/* 5.11 */
33 84#ifndef CxHASARGS
34#ifdef HAVE_MMAP 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT (PL_main_cv == Nullcv)
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
43# endif 161# endif
44#endif 162#endif
45 163
46#define SUB_INIT "Coro::State::initialize" 164static double (*nvtime)(); /* so why doesn't it take void? */
47#define UCORO_STATE "_coro_state"
48 165
49/* The next macro should declare a variable stacklevel that contains and approximation 166/* we hijack an hopefully unused CV flag for our purposes */
50 * to the current C stack pointer. Its property is that it changes with each call 167#define CVf_SLF 0x4000
51 * and should be unique. */ 168static OP *pp_slf (pTHX);
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53 169
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 170static U32 cctx_gen;
55 171static size_t cctx_stacksize = CORO_STACKSIZE;
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif
68
69static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
71static HV *coro_state_stash; 175static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 177
76/* this is actually not only the c stack but also c registers etc... */ 178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
77typedef struct { 213typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 214{
79 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
82 coro_context cctx; 225 coro_context cctx;
83 226
84 void *sptr; 227 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
86} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
87 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243};
244
245/* the structure where most of the perl state is stored, overlaid on the cxstack */
246typedef struct
247{
248 SV *defsv;
249 AV *defav;
250 SV *errsv;
251 SV *irsgv;
252#define VAR(name,type) type name;
253# include "state.h"
254#undef VAR
255} perl_slots;
256
257#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
258
259/* this is a structure representing a perl-level coroutine */
88struct coro { 260struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 261 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 262 coro_cctx *cctx;
91 263
92 /* the optional C context */ 264 /* state data */
93 coro_stack *stack; 265 struct CoroSLF slf_frame; /* saved slf frame */
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 266 AV *mainstack;
110 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 COP *curcop;
134 JMPENV *top_env;
135 268
269 CV *startcv; /* the CV to execute */
136 /* data associated with this coroutine (initial args) */ 270 AV *args; /* data associated with this coroutine (initial args) */
137 AV *args; 271 int refcnt; /* coroutines are refcounted, yes */
272 int flags; /* CF_ flags */
273 HV *hv; /* the perl hash associated with this coro, if any */
274 void (*on_destroy)(pTHX_ struct coro *coro);
275
276 /* statistics */
277 int usecount; /* number of transfers to this coro */
278
279 /* coro process data */
280 int prio;
281 SV *except; /* exception to be thrown */
282 SV *rouse_cb;
283
284 /* async_pool */
285 SV *saved_deffh;
286 SV *invoke_cb;
287 AV *invoke_av;
288
289 /* linked list */
290 struct coro *next, *prev;
138}; 291};
139 292
140typedef struct coro *Coro__State; 293typedef struct coro *Coro__State;
141typedef struct coro *Coro__State_or_hashref; 294typedef struct coro *Coro__State_or_hashref;
142 295
143/* mostly copied from op.c:cv_clone2 */ 296/* the following variables are effectively part of the perl context */
144STATIC AV * 297/* and get copied between struct coro and these variables */
145clone_padlist (pTHX_ AV *protopadlist) 298/* the mainr easonw e don't support windows process emulation */
299static struct CoroSLF slf_frame; /* the current slf frame */
300
301/** Coro ********************************************************************/
302
303#define PRIO_MAX 3
304#define PRIO_HIGH 1
305#define PRIO_NORMAL 0
306#define PRIO_LOW -1
307#define PRIO_IDLE -3
308#define PRIO_MIN -4
309
310/* for Coro.pm */
311static SV *coro_current;
312static SV *coro_readyhook;
313static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
314static CV *cv_coro_run, *cv_coro_terminate;
315static struct coro *coro_first;
316#define coro_nready coroapi.nready
317
318/** lowlevel stuff **********************************************************/
319
320static SV *
321coro_get_sv (pTHX_ const char *name, int create)
146{ 322{
147 AV *av; 323#if PERL_VERSION_ATLEAST (5,10,0)
148 I32 ix; 324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
149 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 325 get_sv (name, create);
150 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 326#endif
151 SV **pname = AvARRAY (protopad_name); 327 return get_sv (name, create);
152 SV **ppad = AvARRAY (protopad); 328}
153 I32 fname = AvFILLp (protopad_name); 329
154 I32 fpad = AvFILLp (protopad); 330static AV *
331coro_get_av (pTHX_ const char *name, int create)
332{
333#if PERL_VERSION_ATLEAST (5,10,0)
334 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
335 get_av (name, create);
336#endif
337 return get_av (name, create);
338}
339
340static HV *
341coro_get_hv (pTHX_ const char *name, int create)
342{
343#if PERL_VERSION_ATLEAST (5,10,0)
344 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
345 get_hv (name, create);
346#endif
347 return get_hv (name, create);
348}
349
350/* may croak */
351INLINE CV *
352coro_sv_2cv (pTHX_ SV *sv)
353{
354 HV *st;
355 GV *gvp;
356 return sv_2cv (sv, &st, &gvp, 0);
357}
358
359static AV *
360coro_derive_padlist (pTHX_ CV *cv)
361{
362 AV *padlist = CvPADLIST (cv);
155 AV *newpadlist, *newpad_name, *newpad; 363 AV *newpadlist, *newpad;
156 SV **npad;
157
158 newpad_name = newAV ();
159 for (ix = fname; ix >= 0; ix--)
160 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162 newpad = newAV ();
163 av_fill (newpad, AvFILLp (protopad));
164 npad = AvARRAY (newpad);
165 364
166 newpadlist = newAV (); 365 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 366 AvREAL_off (newpadlist);
168 av_store (newpadlist, 0, (SV *) newpad_name); 367#if PERL_VERSION_ATLEAST (5,10,0)
368 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
369#else
370 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
371#endif
372 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
373 --AvFILLp (padlist);
374
375 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
169 av_store (newpadlist, 1, (SV *) newpad); 376 av_store (newpadlist, 1, (SV *)newpad);
170
171 av = newAV (); /* will be @_ */
172 av_extend (av, 0);
173 av_store (newpad, 0, (SV *) av);
174 AvFLAGS (av) = AVf_REIFY;
175
176 for (ix = fpad; ix > 0; ix--)
177 {
178 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180 if (namesv && namesv != &PL_sv_undef)
181 {
182 char *name = SvPVX (namesv); /* XXX */
183
184 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185 { /* lexical from outside? */
186 npad[ix] = SvREFCNT_inc (ppad[ix]);
187 }
188 else
189 { /* our own lexical */
190 SV *sv;
191 if (*name == '&')
192 sv = SvREFCNT_inc (ppad[ix]);
193 else if (*name == '@')
194 sv = (SV *) newAV ();
195 else if (*name == '%')
196 sv = (SV *) newHV ();
197 else
198 sv = NEWSV (0, 0);
199
200#ifdef SvPADBUSY
201 if (!SvPADBUSY (sv))
202#endif
203 SvPADMY_on (sv);
204
205 npad[ix] = sv;
206 }
207 }
208 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209 {
210 npad[ix] = SvREFCNT_inc (ppad[ix]);
211 }
212 else
213 {
214 SV *sv = NEWSV (0, 0);
215 SvPADTMP_on (sv);
216 npad[ix] = sv;
217 }
218 }
219
220#if 0 /* return -ENOTUNDERSTOOD */
221 /* Now that vars are all in place, clone nested closures. */
222
223 for (ix = fpad; ix > 0; ix--) {
224 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225 if (namesv
226 && namesv != &PL_sv_undef
227 && !(SvFLAGS(namesv) & SVf_FAKE)
228 && *SvPVX(namesv) == '&'
229 && CvCLONE(ppad[ix]))
230 {
231 CV *kid = cv_clone((CV*)ppad[ix]);
232 SvREFCNT_dec(ppad[ix]);
233 CvCLONE_on(kid);
234 SvPADMY_on(kid);
235 npad[ix] = (SV*)kid;
236 }
237 }
238#endif
239 377
240 return newpadlist; 378 return newpadlist;
241} 379}
242 380
243STATIC void 381static void
244free_padlist (pTHX_ AV *padlist) 382free_padlist (pTHX_ AV *padlist)
245{ 383{
246 /* may be during global destruction */ 384 /* may be during global destruction */
247 if (SvREFCNT (padlist)) 385 if (SvREFCNT (padlist))
248 { 386 {
… …
262 400
263 SvREFCNT_dec ((SV*)padlist); 401 SvREFCNT_dec ((SV*)padlist);
264 } 402 }
265} 403}
266 404
267STATIC int 405static int
268coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 406coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269{ 407{
270 AV *padlist; 408 AV *padlist;
271 AV *av = (AV *)mg->mg_obj; 409 AV *av = (AV *)mg->mg_obj;
272 410
273 /* casting is fun. */ 411 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 412 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (aTHX_ padlist); 413 free_padlist (aTHX_ padlist);
276 414
277 SvREFCNT_dec (av); 415 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
278}
279 416
417 return 0;
418}
419
420#define CORO_MAGIC_type_cv 26
280#define PERL_MAGIC_coro PERL_MAGIC_ext 421#define CORO_MAGIC_type_state PERL_MAGIC_ext
281 422
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 423static MGVTBL coro_cv_vtbl = {
424 0, 0, 0, 0,
425 coro_cv_free
426};
427
428#define CORO_MAGIC_NN(sv, type) \
429 (expect_true (SvMAGIC (sv)->mg_type == type) \
430 ? SvMAGIC (sv) \
431 : mg_find (sv, type))
432
433#define CORO_MAGIC(sv, type) \
434 (expect_true (SvMAGIC (sv)) \
435 ? CORO_MAGIC_NN (sv, type) \
436 : 0)
437
438#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
439#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
440
441INLINE struct coro *
442SvSTATE_ (pTHX_ SV *coro)
443{
444 HV *stash;
445 MAGIC *mg;
446
447 if (SvROK (coro))
448 coro = SvRV (coro);
449
450 if (expect_false (SvTYPE (coro) != SVt_PVHV))
451 croak ("Coro::State object required");
452
453 stash = SvSTASH (coro);
454 if (expect_false (stash != coro_stash && stash != coro_state_stash))
455 {
456 /* very slow, but rare, check */
457 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
458 croak ("Coro::State object required");
459 }
460
461 mg = CORO_MAGIC_state (coro);
462 return (struct coro *)mg->mg_ptr;
463}
464
465#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
466
467/* faster than SvSTATE, but expects a coroutine hv */
468#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
469#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
283 470
284/* the next two functions merely cache the padlists */ 471/* the next two functions merely cache the padlists */
285STATIC void 472static void
286get_padlist (pTHX_ CV *cv) 473get_padlist (pTHX_ CV *cv)
287{ 474{
288 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 475 MAGIC *mg = CORO_MAGIC_cv (cv);
476 AV *av;
289 477
290 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 478 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
291 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 479 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292 else 480 else
481 {
482#if CORO_PREFER_PERL_FUNCTIONS
483 /* this is probably cleaner? but also slower! */
484 /* in practise, it seems to be less stable */
485 CV *cp = Perl_cv_clone (aTHX_ cv);
486 CvPADLIST (cv) = CvPADLIST (cp);
487 CvPADLIST (cp) = 0;
488 SvREFCNT_dec (cp);
489#else
293 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 490 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
491#endif
492 }
294} 493}
295 494
296STATIC void 495static void
297put_padlist (pTHX_ CV *cv) 496put_padlist (pTHX_ CV *cv)
298{ 497{
299 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 498 MAGIC *mg = CORO_MAGIC_cv (cv);
499 AV *av;
300 500
301 if (!mg) 501 if (expect_false (!mg))
302 { 502 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
303 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305 mg->mg_virtual = &vtbl_coro;
306 mg->mg_obj = (SV *)newAV ();
307 }
308 503
309 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 504 av = (AV *)mg->mg_obj;
310}
311 505
312#define SB do { 506 if (expect_false (AvFILLp (av) >= AvMAX (av)))
313#define SE } while (0) 507 av_extend (av, AvMAX (av) + 1);
314 508
315#define LOAD(state) load_state(aTHX_ (state)); 509 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
316#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 510}
317 511
318#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 512/** load & save, init *******************************************************/
319 513
320static void 514static void
321load_state(pTHX_ Coro__State c) 515load_perl (pTHX_ Coro__State c)
322{ 516{
323 PL_dowarn = c->dowarn; 517 perl_slots *slot = c->slot;
324 PL_in_eval = c->in_eval; 518 c->slot = 0;
325 519
326 PL_curstackinfo = c->curstackinfo;
327 PL_curstack = c->curstack;
328 PL_mainstack = c->mainstack; 520 PL_mainstack = c->mainstack;
329 PL_stack_sp = c->stack_sp;
330 PL_op = c->op;
331 PL_curpad = c->curpad;
332 PL_comppad = c->comppad;
333 PL_compcv = c->compcv;
334 PL_stack_base = c->stack_base;
335 PL_stack_max = c->stack_max;
336 PL_tmps_stack = c->tmps_stack;
337 PL_tmps_floor = c->tmps_floor;
338 PL_tmps_ix = c->tmps_ix;
339 PL_tmps_max = c->tmps_max;
340 PL_markstack = c->markstack;
341 PL_markstack_ptr = c->markstack_ptr;
342 PL_markstack_max = c->markstack_max;
343 PL_scopestack = c->scopestack;
344 PL_scopestack_ix = c->scopestack_ix;
345 PL_scopestack_max = c->scopestack_max;
346 PL_savestack = c->savestack;
347 PL_savestack_ix = c->savestack_ix;
348 PL_savestack_max = c->savestack_max;
349 PL_retstack = c->retstack;
350 PL_retstack_ix = c->retstack_ix;
351 PL_retstack_max = c->retstack_max;
352 PL_curcop = c->curcop;
353 PL_top_env = c->top_env;
354 521
355 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 522 GvSV (PL_defgv) = slot->defsv;
356 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 523 GvAV (PL_defgv) = slot->defav;
357 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 524 GvSV (PL_errgv) = slot->errsv;
525 GvSV (irsgv) = slot->irsgv;
526
527 #define VAR(name,type) PL_ ## name = slot->name;
528 # include "state.h"
529 #undef VAR
358 530
359 { 531 {
360 dSP; 532 dSP;
533
361 CV *cv; 534 CV *cv;
362 535
363 /* now do the ugly restore mess */ 536 /* now do the ugly restore mess */
364 while ((cv = (CV *)POPs)) 537 while (expect_true (cv = (CV *)POPs))
365 { 538 {
366 AV *padlist = (AV *)POPs;
367
368 if (padlist)
369 {
370 put_padlist (aTHX_ cv); /* mark this padlist as available */ 539 put_padlist (aTHX_ cv); /* mark this padlist as available */
371 CvPADLIST(cv) = padlist; 540 CvDEPTH (cv) = PTR2IV (POPs);
372 } 541 CvPADLIST (cv) = (AV *)POPs;
373
374 ++CvDEPTH(cv);
375 } 542 }
376 543
377 PUTBACK; 544 PUTBACK;
378 } 545 }
379}
380 546
547 slf_frame = c->slf_frame;
548 CORO_THROW = c->except;
549}
550
381static void 551static void
382save_state(pTHX_ Coro__State c, int flags) 552save_perl (pTHX_ Coro__State c)
383{ 553{
554 c->except = CORO_THROW;
555 c->slf_frame = slf_frame;
556
384 { 557 {
385 dSP; 558 dSP;
386 I32 cxix = cxstack_ix; 559 I32 cxix = cxstack_ix;
387 PERL_CONTEXT *ccstk = cxstack; 560 PERL_CONTEXT *ccstk = cxstack;
388 PERL_SI *top_si = PL_curstackinfo; 561 PERL_SI *top_si = PL_curstackinfo;
… …
390 /* 563 /*
391 * the worst thing you can imagine happens first - we have to save 564 * the worst thing you can imagine happens first - we have to save
392 * (and reinitialize) all cv's in the whole callchain :( 565 * (and reinitialize) all cv's in the whole callchain :(
393 */ 566 */
394 567
395 PUSHs (Nullsv); 568 XPUSHs (Nullsv);
396 /* this loop was inspired by pp_caller */ 569 /* this loop was inspired by pp_caller */
397 for (;;) 570 for (;;)
398 { 571 {
399 while (cxix >= 0) 572 while (expect_true (cxix >= 0))
400 { 573 {
401 PERL_CONTEXT *cx = &ccstk[cxix--]; 574 PERL_CONTEXT *cx = &ccstk[cxix--];
402 575
403 if (CxTYPE(cx) == CXt_SUB) 576 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
404 { 577 {
405 CV *cv = cx->blk_sub.cv; 578 CV *cv = cx->blk_sub.cv;
579
406 if (CvDEPTH(cv)) 580 if (expect_true (CvDEPTH (cv)))
407 { 581 {
408 EXTEND (SP, CvDEPTH(cv)*2); 582 EXTEND (SP, 3);
409
410 while (--CvDEPTH(cv))
411 {
412 /* this tells the restore code to increment CvDEPTH */
413 PUSHs (Nullsv);
414 PUSHs ((SV *)cv);
415 }
416
417 PUSHs ((SV *)CvPADLIST(cv)); 583 PUSHs ((SV *)CvPADLIST (cv));
584 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 585 PUSHs ((SV *)cv);
419 586
587 CvDEPTH (cv) = 0;
420 get_padlist (aTHX_ cv); /* this is a monster */ 588 get_padlist (aTHX_ cv);
421 } 589 }
422 } 590 }
423#ifdef CXt_FORMAT
424 else if (CxTYPE(cx) == CXt_FORMAT)
425 {
426 /* I never used formats, so how should I know how these are implemented? */
427 /* my bold guess is as a simple, plain sub... */
428 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429 }
430#endif
431 } 591 }
432 592
433 if (top_si->si_type == PERLSI_MAIN) 593 if (expect_true (top_si->si_type == PERLSI_MAIN))
434 break; 594 break;
435 595
436 top_si = top_si->si_prev; 596 top_si = top_si->si_prev;
437 ccstk = top_si->si_cxstack; 597 ccstk = top_si->si_cxstack;
438 cxix = top_si->si_cxix; 598 cxix = top_si->si_cxix;
439 } 599 }
440 600
441 PUTBACK; 601 PUTBACK;
442 } 602 }
443 603
444 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 604 /* allocate some space on the context stack for our purposes */
445 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 605 /* we manually unroll here, as usually 2 slots is enough */
446 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 606 if (SLOT_COUNT >= 1) CXINC;
607 if (SLOT_COUNT >= 2) CXINC;
608 if (SLOT_COUNT >= 3) CXINC;
609 {
610 int i;
611 for (i = 3; i < SLOT_COUNT; ++i)
612 CXINC;
613 }
614 cxstack_ix -= SLOT_COUNT; /* undo allocation */
447 615
448 c->dowarn = PL_dowarn;
449 c->in_eval = PL_in_eval;
450
451 c->curstackinfo = PL_curstackinfo;
452 c->curstack = PL_curstack;
453 c->mainstack = PL_mainstack; 616 c->mainstack = PL_mainstack;
454 c->stack_sp = PL_stack_sp; 617
455 c->op = PL_op; 618 {
456 c->curpad = PL_curpad; 619 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
457 c->comppad = PL_comppad; 620
458 c->compcv = PL_compcv; 621 slot->defav = GvAV (PL_defgv);
459 c->stack_base = PL_stack_base; 622 slot->defsv = DEFSV;
460 c->stack_max = PL_stack_max; 623 slot->errsv = ERRSV;
461 c->tmps_stack = PL_tmps_stack; 624 slot->irsgv = GvSV (irsgv);
462 c->tmps_floor = PL_tmps_floor; 625
463 c->tmps_ix = PL_tmps_ix; 626 #define VAR(name,type) slot->name = PL_ ## name;
464 c->tmps_max = PL_tmps_max; 627 # include "state.h"
465 c->markstack = PL_markstack; 628 #undef VAR
466 c->markstack_ptr = PL_markstack_ptr; 629 }
467 c->markstack_max = PL_markstack_max;
468 c->scopestack = PL_scopestack;
469 c->scopestack_ix = PL_scopestack_ix;
470 c->scopestack_max = PL_scopestack_max;
471 c->savestack = PL_savestack;
472 c->savestack_ix = PL_savestack_ix;
473 c->savestack_max = PL_savestack_max;
474 c->retstack = PL_retstack;
475 c->retstack_ix = PL_retstack_ix;
476 c->retstack_max = PL_retstack_max;
477 c->curcop = PL_curcop;
478 c->top_env = PL_top_env;
479} 630}
480 631
481/* 632/*
482 * allocate various perl stacks. This is an exact copy 633 * allocate various perl stacks. This is almost an exact copy
483 * of perl.c:init_stacks, except that it uses less memory 634 * of perl.c:init_stacks, except that it uses less memory
484 * on the (sometimes correct) assumption that coroutines do 635 * on the (sometimes correct) assumption that coroutines do
485 * not usually need a lot of stackspace. 636 * not usually need a lot of stackspace.
486 */ 637 */
487STATIC void 638#if CORO_PREFER_PERL_FUNCTIONS
639# define coro_init_stacks(thx) init_stacks ()
640#else
641static void
488coro_init_stacks (pTHX) 642coro_init_stacks (pTHX)
489{ 643{
490 LOCK; 644 PL_curstackinfo = new_stackinfo(32, 8);
491
492 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493 PL_curstackinfo->si_type = PERLSI_MAIN; 645 PL_curstackinfo->si_type = PERLSI_MAIN;
494 PL_curstack = PL_curstackinfo->si_stack; 646 PL_curstack = PL_curstackinfo->si_stack;
495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 647 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496 648
497 PL_stack_base = AvARRAY(PL_curstack); 649 PL_stack_base = AvARRAY(PL_curstack);
498 PL_stack_sp = PL_stack_base; 650 PL_stack_sp = PL_stack_base;
499 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 651 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500 652
501 New(50,PL_tmps_stack,96,SV*); 653 New(50,PL_tmps_stack,32,SV*);
502 PL_tmps_floor = -1; 654 PL_tmps_floor = -1;
503 PL_tmps_ix = -1; 655 PL_tmps_ix = -1;
504 PL_tmps_max = 96; 656 PL_tmps_max = 32;
505 657
506 New(54,PL_markstack,16,I32); 658 New(54,PL_markstack,16,I32);
507 PL_markstack_ptr = PL_markstack; 659 PL_markstack_ptr = PL_markstack;
508 PL_markstack_max = PL_markstack + 16; 660 PL_markstack_max = PL_markstack + 16;
509 661
510#ifdef SET_MARK_OFFSET 662#ifdef SET_MARK_OFFSET
511 SET_MARK_OFFSET; 663 SET_MARK_OFFSET;
512#endif 664#endif
513 665
514 New(54,PL_scopestack,16,I32); 666 New(54,PL_scopestack,8,I32);
515 PL_scopestack_ix = 0; 667 PL_scopestack_ix = 0;
516 PL_scopestack_max = 16; 668 PL_scopestack_max = 8;
517 669
518 New(54,PL_savestack,96,ANY); 670 New(54,PL_savestack,24,ANY);
519 PL_savestack_ix = 0; 671 PL_savestack_ix = 0;
520 PL_savestack_max = 96; 672 PL_savestack_max = 24;
521 673
674#if !PERL_VERSION_ATLEAST (5,10,0)
522 New(54,PL_retstack,8,OP*); 675 New(54,PL_retstack,4,OP*);
523 PL_retstack_ix = 0; 676 PL_retstack_ix = 0;
524 PL_retstack_max = 8; 677 PL_retstack_max = 4;
525 678#endif
526 UNLOCK;
527} 679}
680#endif
528 681
529/* 682/*
530 * destroy the stacks, the callchain etc... 683 * destroy the stacks, the callchain etc...
531 */ 684 */
532STATIC void 685static void
533destroy_stacks(pTHX) 686coro_destruct_stacks (pTHX)
534{ 687{
535 if (!IN_DESTRUCT)
536 {
537 /* is this ugly, I ask? */
538 LEAVE_SCOPE (0);
539
540 /* sure it is, but more important: is it correct?? :/ */
541 FREETMPS;
542
543 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544 }
545
546 while (PL_curstackinfo->si_next) 688 while (PL_curstackinfo->si_next)
547 PL_curstackinfo = PL_curstackinfo->si_next; 689 PL_curstackinfo = PL_curstackinfo->si_next;
548 690
549 while (PL_curstackinfo) 691 while (PL_curstackinfo)
550 { 692 {
551 PERL_SI *p = PL_curstackinfo->si_prev; 693 PERL_SI *p = PL_curstackinfo->si_prev;
552 694
553 { /*D*//*remove*/
554 dSP;
555 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556 PUTBACK; /* possibly superfluous */
557 }
558
559 if (!IN_DESTRUCT) 695 if (!IN_DESTRUCT)
560 {
561 dounwind (-1);/*D*//*remove*/
562 SvREFCNT_dec (PL_curstackinfo->si_stack); 696 SvREFCNT_dec (PL_curstackinfo->si_stack);
563 }
564 697
565 Safefree (PL_curstackinfo->si_cxstack); 698 Safefree (PL_curstackinfo->si_cxstack);
566 Safefree (PL_curstackinfo); 699 Safefree (PL_curstackinfo);
567 PL_curstackinfo = p; 700 PL_curstackinfo = p;
568 } 701 }
569 702
570 Safefree (PL_tmps_stack); 703 Safefree (PL_tmps_stack);
571 Safefree (PL_markstack); 704 Safefree (PL_markstack);
572 Safefree (PL_scopestack); 705 Safefree (PL_scopestack);
573 Safefree (PL_savestack); 706 Safefree (PL_savestack);
707#if !PERL_VERSION_ATLEAST (5,10,0)
574 Safefree (PL_retstack); 708 Safefree (PL_retstack);
575}
576
577static void
578allocate_stack (Coro__State ctx, int alloc)
579{
580 coro_stack *stack;
581
582 New (0, stack, 1, coro_stack);
583
584 stack->refcnt = 1;
585 stack->usecnt = 1;
586 stack->gencnt = ctx->gencnt = 0;
587
588 if (alloc)
589 {
590#if HAVE_MMAP
591 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593 if (stack->sptr == (void *)-1)
594#endif 709#endif
710}
711
712#define CORO_RSS \
713 rss += sizeof (SYM (curstackinfo)); \
714 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
715 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
716 rss += SYM (tmps_max) * sizeof (SV *); \
717 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
718 rss += SYM (scopestack_max) * sizeof (I32); \
719 rss += SYM (savestack_max) * sizeof (ANY);
720
721static size_t
722coro_rss (pTHX_ struct coro *coro)
723{
724 size_t rss = sizeof (*coro);
725
726 if (coro->mainstack)
727 {
728 if (coro->flags & CF_RUNNING)
595 { 729 {
596 /*FIXME*//*D*//* reasonable stack size! */ 730 #define SYM(sym) PL_ ## sym
597 stack->ssize = - (8192 * sizeof (long)); 731 CORO_RSS;
598 New (0, stack->sptr, 8192, long); 732 #undef SYM
599 } 733 }
600 }
601 else 734 else
602 stack->sptr = 0;
603
604 ctx->stack = stack;
605}
606
607static void
608deallocate_stack (Coro__State ctx)
609{
610 coro_stack *stack = ctx->stack;
611
612 ctx->stack = 0;
613
614 if (stack)
615 {
616 if (!--stack->refcnt)
617 { 735 {
618#ifdef HAVE_MMAP 736 #define SYM(sym) coro->slot->sym
619 if (stack->ssize > 0 && stack->sptr) 737 CORO_RSS;
620 munmap (stack->sptr, stack->ssize); 738 #undef SYM
621 else
622#endif
623 Safefree (stack->sptr);
624
625 Safefree (stack);
626 } 739 }
627 else if (ctx->gencnt == stack->gencnt) 740 }
628 --stack->usecnt; 741
742 return rss;
743}
744
745/** coroutine stack handling ************************************************/
746
747static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
748static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
750
751/* apparently < 5.8.8 */
752#ifndef MgPV_nolen_const
753#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
754 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
755 (const char*)(mg)->mg_ptr)
756#endif
757
758/*
759 * This overrides the default magic get method of %SIG elements.
760 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
761 * and instead of tryign to save and restore the hash elements, we just provide
762 * readback here.
763 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
764 * not expecting this to actually change the hook. This is a potential problem
765 * when a schedule happens then, but we ignore this.
766 */
767static int
768coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
629 } 773 {
630} 774 SV **svp = 0;
631 775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
787}
788
632static void 789static int
633setup_coro (void *arg) 790coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = 0;
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
811}
812
813static int
814coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
815{
816 const char *s = MgPV_nolen_const (mg);
817
818 if (*s == '_')
819 {
820 SV **svp = 0;
821
822 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
823 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
824
825 if (svp)
826 {
827 SV *old = *svp;
828 *svp = newSVsv (sv);
829 SvREFCNT_dec (old);
830 return 0;
831 }
832 }
833
834 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
835}
836
837static void
838prepare_nop (pTHX_ struct coro_transfer_args *ta)
839{
840 /* kind of mega-hacky, but works */
841 ta->next = ta->prev = (struct coro *)ta;
842}
843
844static int
845slf_check_nop (pTHX_ struct CoroSLF *frame)
846{
847 return 0;
848}
849
850static int
851slf_check_repeat (pTHX_ struct CoroSLF *frame)
852{
853 return 1;
854}
855
856static UNOP coro_setup_op;
857
858static void NOINLINE /* noinline to keep it out of the transfer fast path */
859coro_setup (pTHX_ struct coro *coro)
634{ 860{
635 /* 861 /*
636 * emulate part of the perl startup here. 862 * emulate part of the perl startup here.
637 */ 863 */
638 dTHX;
639 dSP;
640 Coro__State ctx = (Coro__State)arg;
641 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642
643 coro_init_stacks (aTHX); 864 coro_init_stacks (aTHX);
644 /*PL_curcop = 0;*/ 865
645 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 866 PL_runops = RUNOPS_DEFAULT;
867 PL_curcop = &PL_compiling;
868 PL_in_eval = EVAL_NULL;
869 PL_comppad = 0;
870 PL_curpm = 0;
871 PL_curpad = 0;
872 PL_localizing = 0;
873 PL_dirty = 0;
874 PL_restartop = 0;
875#if PERL_VERSION_ATLEAST (5,10,0)
876 PL_parser = 0;
877#endif
878
879 /* recreate the die/warn hooks */
880 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
881 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
882
883 GvSV (PL_defgv) = newSV (0);
884 GvAV (PL_defgv) = coro->args; coro->args = 0;
885 GvSV (PL_errgv) = newSV (0);
886 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
887 PL_rs = newSVsv (GvSV (irsgv));
888 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
889
890 {
891 dSP;
892 UNOP myop;
893
894 Zero (&myop, 1, UNOP);
895 myop.op_next = Nullop;
896 myop.op_type = OP_ENTERSUB;
897 myop.op_flags = OPf_WANT_VOID;
898
899 PUSHMARK (SP);
900 PUSHs ((SV *)coro->startcv);
901 PUTBACK;
902 PL_op = (OP *)&myop;
903 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
904 }
905
906 /* this newly created coroutine might be run on an existing cctx which most
907 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
908 */
909 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
910 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
911
912 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
913 coro_setup_op.op_next = PL_op;
914 coro_setup_op.op_type = OP_ENTERSUB;
915 coro_setup_op.op_ppaddr = pp_slf;
916 /* no flags etc. required, as an init function won't be called */
917
918 PL_op = (OP *)&coro_setup_op;
919
920 /* copy throw, in case it was set before coro_setup */
921 CORO_THROW = coro->except;
922}
923
924static void
925coro_destruct (pTHX_ struct coro *coro)
926{
927 if (!IN_DESTRUCT)
928 {
929 /* restore all saved variables and stuff */
930 LEAVE_SCOPE (0);
931 assert (PL_tmps_floor == -1);
932
933 /* free all temporaries */
934 FREETMPS;
935 assert (PL_tmps_ix == -1);
936
937 /* unwind all extra stacks */
938 POPSTACK_TO (PL_mainstack);
939
940 /* unwind main stack */
941 dounwind (-1);
942 }
943
944 SvREFCNT_dec (GvSV (PL_defgv));
646 SvREFCNT_dec (GvAV (PL_defgv)); 945 SvREFCNT_dec (GvAV (PL_defgv));
647 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 946 SvREFCNT_dec (GvSV (PL_errgv));
947 SvREFCNT_dec (PL_defoutgv);
948 SvREFCNT_dec (PL_rs);
949 SvREFCNT_dec (GvSV (irsgv));
648 950
649 SPAGAIN; 951 SvREFCNT_dec (PL_diehook);
952 SvREFCNT_dec (PL_warnhook);
953
954 SvREFCNT_dec (coro->saved_deffh);
955 SvREFCNT_dec (coro->rouse_cb);
956 SvREFCNT_dec (coro->invoke_cb);
957 SvREFCNT_dec (coro->invoke_av);
650 958
959 coro_destruct_stacks (aTHX);
960}
961
962INLINE void
963free_coro_mortal (pTHX)
964{
965 if (expect_true (coro_mortal))
966 {
967 SvREFCNT_dec (coro_mortal);
968 coro_mortal = 0;
969 }
970}
971
972static int
973runops_trace (pTHX)
974{
975 COP *oldcop = 0;
976 int oldcxix = -2;
977
978 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
979 {
980 PERL_ASYNC_CHECK ();
981
982 if (cctx_current->flags & CC_TRACE_ALL)
983 {
984 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
985 {
986 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
987 SV **bot, **top;
988 AV *av = newAV (); /* return values */
989 SV **cb;
990 dSP;
991
992 GV *gv = CvGV (cx->blk_sub.cv);
993 SV *fullname = sv_2mortal (newSV (0));
994 if (isGV (gv))
995 gv_efullname3 (fullname, gv, 0);
996
997 bot = PL_stack_base + cx->blk_oldsp + 1;
998 top = cx->blk_gimme == G_ARRAY ? SP + 1
999 : cx->blk_gimme == G_SCALAR ? bot + 1
1000 : bot;
1001
1002 av_extend (av, top - bot);
1003 while (bot < top)
1004 av_push (av, SvREFCNT_inc_NN (*bot++));
1005
1006 PL_runops = RUNOPS_DEFAULT;
1007 ENTER;
1008 SAVETMPS;
1009 EXTEND (SP, 3);
1010 PUSHMARK (SP);
1011 PUSHs (&PL_sv_no);
1012 PUSHs (fullname);
1013 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1014 PUTBACK;
1015 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1016 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1017 SPAGAIN;
1018 FREETMPS;
1019 LEAVE;
1020 PL_runops = runops_trace;
1021 }
1022
1023 if (oldcop != PL_curcop)
1024 {
1025 oldcop = PL_curcop;
1026
1027 if (PL_curcop != &PL_compiling)
1028 {
1029 SV **cb;
1030
1031 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1032 {
1033 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1034
1035 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1036 {
1037 dSP;
1038 GV *gv = CvGV (cx->blk_sub.cv);
1039 SV *fullname = sv_2mortal (newSV (0));
1040
1041 if (isGV (gv))
1042 gv_efullname3 (fullname, gv, 0);
1043
1044 PL_runops = RUNOPS_DEFAULT;
1045 ENTER;
1046 SAVETMPS;
1047 EXTEND (SP, 3);
1048 PUSHMARK (SP);
1049 PUSHs (&PL_sv_yes);
1050 PUSHs (fullname);
1051 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1052 PUTBACK;
1053 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1054 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1055 SPAGAIN;
1056 FREETMPS;
1057 LEAVE;
1058 PL_runops = runops_trace;
1059 }
1060
1061 oldcxix = cxstack_ix;
1062 }
1063
1064 if (cctx_current->flags & CC_TRACE_LINE)
1065 {
1066 dSP;
1067
1068 PL_runops = RUNOPS_DEFAULT;
1069 ENTER;
1070 SAVETMPS;
1071 EXTEND (SP, 3);
1072 PL_runops = RUNOPS_DEFAULT;
1073 PUSHMARK (SP);
1074 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1075 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1076 PUTBACK;
1077 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1078 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1079 SPAGAIN;
1080 FREETMPS;
1081 LEAVE;
1082 PL_runops = runops_trace;
1083 }
1084 }
1085 }
1086 }
1087 }
1088
1089 TAINT_NOT;
1090 return 0;
1091}
1092
1093static struct CoroSLF cctx_ssl_frame;
1094
1095static void
1096slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1097{
1098 ta->prev = 0;
1099}
1100
1101static int
1102slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1103{
1104 *frame = cctx_ssl_frame;
1105
1106 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1107}
1108
1109/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1110static void NOINLINE
1111cctx_prepare (pTHX)
1112{
1113 PL_top_env = &PL_start_env;
1114
1115 if (cctx_current->flags & CC_TRACE)
1116 PL_runops = runops_trace;
1117
1118 /* we already must be executing an SLF op, there is no other valid way
1119 * that can lead to creation of a new cctx */
1120 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1121 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1122
1123 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1124 cctx_ssl_frame = slf_frame;
1125
1126 slf_frame.prepare = slf_prepare_set_stacklevel;
1127 slf_frame.check = slf_check_set_stacklevel;
1128}
1129
1130/* the tail of transfer: execute stuff we can only do after a transfer */
1131INLINE void
1132transfer_tail (pTHX)
1133{
1134 free_coro_mortal (aTHX);
1135}
1136
1137/*
1138 * this is a _very_ stripped down perl interpreter ;)
1139 */
1140static void
1141cctx_run (void *arg)
1142{
1143#ifdef USE_ITHREADS
1144# if CORO_PTHREAD
1145 PERL_SET_CONTEXT (coro_thx);
1146# endif
1147#endif
1148 {
1149 dTHX;
1150
1151 /* normally we would need to skip the entersub here */
1152 /* not doing so will re-execute it, which is exactly what we want */
1153 /* PL_nop = PL_nop->op_next */
1154
1155 /* inject a fake subroutine call to cctx_init */
1156 cctx_prepare (aTHX);
1157
1158 /* cctx_run is the alternative tail of transfer() */
1159 transfer_tail (aTHX);
1160
1161 /* somebody or something will hit me for both perl_run and PL_restartop */
1162 PL_restartop = PL_op;
1163 perl_run (PL_curinterp);
1164 /*
1165 * Unfortunately, there is no way to get at the return values of the
1166 * coro body here, as perl_run destroys these
1167 */
1168
1169 /*
1170 * If perl-run returns we assume exit() was being called or the coro
1171 * fell off the end, which seems to be the only valid (non-bug)
1172 * reason for perl_run to return. We try to exit by jumping to the
1173 * bootstrap-time "top" top_env, as we cannot restore the "main"
1174 * coroutine as Coro has no such concept
1175 */
1176 PL_top_env = main_top_env;
1177 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1178 }
1179}
1180
1181static coro_cctx *
1182cctx_new ()
1183{
1184 coro_cctx *cctx;
1185
1186 ++cctx_count;
1187 New (0, cctx, 1, coro_cctx);
1188
1189 cctx->gen = cctx_gen;
1190 cctx->flags = 0;
1191 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1192
1193 return cctx;
1194}
1195
1196/* create a new cctx only suitable as source */
1197static coro_cctx *
1198cctx_new_empty ()
1199{
1200 coro_cctx *cctx = cctx_new ();
1201
1202 cctx->sptr = 0;
1203 coro_create (&cctx->cctx, 0, 0, 0, 0);
1204
1205 return cctx;
1206}
1207
1208/* create a new cctx suitable as destination/running a perl interpreter */
1209static coro_cctx *
1210cctx_new_run ()
1211{
1212 coro_cctx *cctx = cctx_new ();
1213 void *stack_start;
1214 size_t stack_size;
1215
1216#if HAVE_MMAP
1217 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1218 /* mmap supposedly does allocate-on-write for us */
1219 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1220
1221 if (cctx->sptr != (void *)-1)
1222 {
1223 #if CORO_STACKGUARD
1224 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1225 #endif
1226 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1227 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1228 cctx->flags |= CC_MAPPED;
1229 }
1230 else
1231#endif
1232 {
1233 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1234 New (0, cctx->sptr, cctx_stacksize, long);
1235
1236 if (!cctx->sptr)
1237 {
1238 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1239 _exit (EXIT_FAILURE);
1240 }
1241
1242 stack_start = cctx->sptr;
1243 stack_size = cctx->ssize;
1244 }
1245
1246 #if CORO_USE_VALGRIND
1247 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1248 #endif
1249
1250 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1251
1252 return cctx;
1253}
1254
1255static void
1256cctx_destroy (coro_cctx *cctx)
1257{
1258 if (!cctx)
1259 return;
1260
1261 assert (cctx != cctx_current);//D temporary
1262
1263 --cctx_count;
1264 coro_destroy (&cctx->cctx);
1265
1266 /* coro_transfer creates new, empty cctx's */
651 if (ctx->stack) 1267 if (cctx->sptr)
1268 {
1269 #if CORO_USE_VALGRIND
1270 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1271 #endif
1272
1273#if HAVE_MMAP
1274 if (cctx->flags & CC_MAPPED)
1275 munmap (cctx->sptr, cctx->ssize);
1276 else
1277#endif
1278 Safefree (cctx->sptr);
652 { 1279 }
653 ctx->cursp = 0;
654 1280
1281 Safefree (cctx);
1282}
1283
1284/* wether this cctx should be destructed */
1285#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1286
1287static coro_cctx *
1288cctx_get (pTHX)
1289{
1290 while (expect_true (cctx_first))
1291 {
1292 coro_cctx *cctx = cctx_first;
1293 cctx_first = cctx->next;
1294 --cctx_idle;
1295
1296 if (expect_true (!CCTX_EXPIRED (cctx)))
1297 return cctx;
1298
1299 cctx_destroy (cctx);
1300 }
1301
1302 return cctx_new_run ();
1303}
1304
1305static void
1306cctx_put (coro_cctx *cctx)
1307{
1308 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1309
1310 /* free another cctx if overlimit */
1311 if (expect_false (cctx_idle >= cctx_max_idle))
1312 {
1313 coro_cctx *first = cctx_first;
1314 cctx_first = first->next;
1315 --cctx_idle;
1316
1317 cctx_destroy (first);
1318 }
1319
1320 ++cctx_idle;
1321 cctx->next = cctx_first;
1322 cctx_first = cctx;
1323}
1324
1325/** coroutine switching *****************************************************/
1326
1327static void
1328transfer_check (pTHX_ struct coro *prev, struct coro *next)
1329{
1330 /* TODO: throwing up here is considered harmful */
1331
1332 if (expect_true (prev != next))
1333 {
1334 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1335 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1336
1337 if (expect_false (next->flags & CF_RUNNING))
1338 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1339
1340 if (expect_false (next->flags & CF_DESTROYED))
1341 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1342
1343#if !PERL_VERSION_ATLEAST (5,10,0)
1344 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1345 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1346#endif
1347 }
1348}
1349
1350/* always use the TRANSFER macro */
1351static void NOINLINE /* noinline so we have a fixed stackframe */
1352transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1353{
1354 dSTACKLEVEL;
1355
1356 /* sometimes transfer is only called to set idle_sp */
1357 if (expect_false (!prev))
1358 {
1359 cctx_current->idle_sp = STACKLEVEL;
1360 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1361 }
1362 else if (expect_true (prev != next))
1363 {
1364 coro_cctx *cctx_prev;
1365
1366 if (expect_false (prev->flags & CF_NEW))
1367 {
1368 /* create a new empty/source context */
1369 prev->flags &= ~CF_NEW;
1370 prev->flags |= CF_RUNNING;
1371 }
1372
1373 prev->flags &= ~CF_RUNNING;
1374 next->flags |= CF_RUNNING;
1375
1376 /* first get rid of the old state */
1377 save_perl (aTHX_ prev);
1378
1379 if (expect_false (next->flags & CF_NEW))
1380 {
1381 /* need to start coroutine */
1382 next->flags &= ~CF_NEW;
1383 /* setup coroutine call */
1384 coro_setup (aTHX_ next);
1385 }
1386 else
1387 load_perl (aTHX_ next);
1388
1389 assert (!prev->cctx);//D temporary
1390
1391 /* possibly untie and reuse the cctx */
1392 if (expect_true (
1393 cctx_current->idle_sp == STACKLEVEL
1394 && !(cctx_current->flags & CC_TRACE)
1395 && !force_cctx
1396 ))
1397 {
1398 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1399 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1400
1401 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1402 /* without this the next cctx_get might destroy the running cctx while still in use */
1403 if (expect_false (CCTX_EXPIRED (cctx_current)))
1404 if (expect_true (!next->cctx))
1405 next->cctx = cctx_get (aTHX);
1406
1407 cctx_put (cctx_current);
1408 }
1409 else
1410 prev->cctx = cctx_current;
1411
1412 ++next->usecount;
1413
1414 cctx_prev = cctx_current;
1415 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1416
1417 next->cctx = 0;
1418
1419 if (expect_false (cctx_prev != cctx_current))
1420 {
1421 cctx_prev->top_env = PL_top_env;
1422 PL_top_env = cctx_current->top_env;
1423 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1424 }
1425
1426 transfer_tail (aTHX);
1427 }
1428}
1429
1430#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1431#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1432
1433/** high level stuff ********************************************************/
1434
1435static int
1436coro_state_destroy (pTHX_ struct coro *coro)
1437{
1438 if (coro->flags & CF_DESTROYED)
1439 return 0;
1440
1441 if (coro->on_destroy)
1442 coro->on_destroy (aTHX_ coro);
1443
1444 coro->flags |= CF_DESTROYED;
1445
1446 if (coro->flags & CF_READY)
1447 {
1448 /* reduce nready, as destroying a ready coro effectively unreadies it */
1449 /* alternative: look through all ready queues and remove the coro */
1450 --coro_nready;
1451 }
1452 else
1453 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1454
1455 if (coro->mainstack && coro->mainstack != main_mainstack)
1456 {
1457 struct coro temp;
1458
1459 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1460
1461 save_perl (aTHX_ &temp);
1462 load_perl (aTHX_ coro);
1463
1464 coro_destruct (aTHX_ coro);
1465
1466 load_perl (aTHX_ &temp);
1467
1468 coro->slot = 0;
1469 }
1470
1471 cctx_destroy (coro->cctx);
1472 SvREFCNT_dec (coro->startcv);
1473 SvREFCNT_dec (coro->args);
1474 SvREFCNT_dec (CORO_THROW);
1475
1476 if (coro->next) coro->next->prev = coro->prev;
1477 if (coro->prev) coro->prev->next = coro->next;
1478 if (coro == coro_first) coro_first = coro->next;
1479
1480 return 1;
1481}
1482
1483static int
1484coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1485{
1486 struct coro *coro = (struct coro *)mg->mg_ptr;
1487 mg->mg_ptr = 0;
1488
1489 coro->hv = 0;
1490
1491 if (--coro->refcnt < 0)
1492 {
1493 coro_state_destroy (aTHX_ coro);
1494 Safefree (coro);
1495 }
1496
1497 return 0;
1498}
1499
1500static int
1501coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1502{
1503 struct coro *coro = (struct coro *)mg->mg_ptr;
1504
1505 ++coro->refcnt;
1506
1507 return 0;
1508}
1509
1510static MGVTBL coro_state_vtbl = {
1511 0, 0, 0, 0,
1512 coro_state_free,
1513 0,
1514#ifdef MGf_DUP
1515 coro_state_dup,
1516#else
1517# define MGf_DUP 0
1518#endif
1519};
1520
1521static void
1522prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1523{
1524 ta->prev = SvSTATE (prev_sv);
1525 ta->next = SvSTATE (next_sv);
1526 TRANSFER_CHECK (*ta);
1527}
1528
1529static void
1530api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1531{
1532 struct coro_transfer_args ta;
1533
1534 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1535 TRANSFER (ta, 1);
1536}
1537
1538/*****************************************************************************/
1539/* gensub: simple closure generation utility */
1540
1541#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1542
1543/* create a closure from XS, returns a code reference */
1544/* the arg can be accessed via GENSUB_ARG from the callback */
1545/* the callback must use dXSARGS/XSRETURN */
1546static SV *
1547gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1548{
1549 CV *cv = (CV *)newSV (0);
1550
1551 sv_upgrade ((SV *)cv, SVt_PVCV);
1552
1553 CvANON_on (cv);
1554 CvISXSUB_on (cv);
1555 CvXSUB (cv) = xsub;
1556 GENSUB_ARG = arg;
1557
1558 return newRV_noinc ((SV *)cv);
1559}
1560
1561/** Coro ********************************************************************/
1562
1563INLINE void
1564coro_enq (pTHX_ struct coro *coro)
1565{
1566 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1567}
1568
1569INLINE SV *
1570coro_deq (pTHX)
1571{
1572 int prio;
1573
1574 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1575 if (AvFILLp (coro_ready [prio]) >= 0)
1576 return av_shift (coro_ready [prio]);
1577
1578 return 0;
1579}
1580
1581static int
1582api_ready (pTHX_ SV *coro_sv)
1583{
1584 struct coro *coro;
1585 SV *sv_hook;
1586 void (*xs_hook)(void);
1587
1588 coro = SvSTATE (coro_sv);
1589
1590 if (coro->flags & CF_READY)
1591 return 0;
1592
1593 coro->flags |= CF_READY;
1594
1595 sv_hook = coro_nready ? 0 : coro_readyhook;
1596 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1597
1598 coro_enq (aTHX_ coro);
1599 ++coro_nready;
1600
1601 if (sv_hook)
1602 {
1603 dSP;
1604
1605 ENTER;
1606 SAVETMPS;
1607
655 PUSHMARK(SP); 1608 PUSHMARK (SP);
656 PUTBACK; 1609 PUTBACK;
657 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1610 call_sv (sv_hook, G_VOID | G_DISCARD);
658 1611
659 if (SvTRUE (ERRSV)) 1612 FREETMPS;
660 croak (NULL); 1613 LEAVE;
661 else
662 croak ("FATAL: CCTXT coroutine returned!");
663 }
664 else
665 { 1614 }
666 UNOP myop;
667 1615
668 PL_op = (OP *)&myop; 1616 if (xs_hook)
1617 xs_hook ();
669 1618
670 Zero(&myop, 1, UNOP); 1619 return 1;
671 myop.op_next = Nullop; 1620}
672 myop.op_flags = OPf_WANT_VOID;
673 1621
674 PUSHMARK(SP); 1622static int
675 XPUSHs (sub_init); 1623api_is_ready (pTHX_ SV *coro_sv)
676 /* 1624{
677 * the next line is slightly wrong, as PL_op->op_next 1625 return !!(SvSTATE (coro_sv)->flags & CF_READY);
678 * is actually being executed so we skip the first op. 1626}
679 * that doesn't matter, though, since it is only
680 * pp_nextstate and we never return...
681 * ah yes, and I don't care anyways ;)
682 */
683 PUTBACK;
684 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685 SPAGAIN;
686 1627
687 ENTER; /* necessary e.g. for dounwind */ 1628/* expects to own a reference to next->hv */
1629INLINE void
1630prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1631{
1632 SV *prev_sv = SvRV (coro_current);
1633
1634 ta->prev = SvSTATE_hv (prev_sv);
1635 ta->next = next;
1636
1637 TRANSFER_CHECK (*ta);
1638
1639 SvRV_set (coro_current, (SV *)next->hv);
1640
1641 free_coro_mortal (aTHX);
1642 coro_mortal = prev_sv;
1643}
1644
1645static void
1646prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1647{
1648 for (;;)
688 } 1649 {
689} 1650 SV *next_sv = coro_deq (aTHX);
690 1651
691static void 1652 if (expect_true (next_sv))
692continue_coro (void *arg)
693{
694 /*
695 * this is a _very_ stripped down perl interpreter ;)
696 */
697 dTHX;
698 Coro__State ctx = (Coro__State)arg;
699 JMPENV coro_start_env;
700
701 PL_top_env = &ctx->start_env;
702
703 ctx->cursp = 0;
704 PL_op = PL_op->op_next;
705 CALLRUNOPS(aTHX);
706
707 abort ();
708}
709
710STATIC void
711transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712{
713 dSTACKLEVEL;
714
715 if (prev != next)
716 {
717 if (next->mainstack)
718 { 1653 {
719 LOCK; 1654 struct coro *next = SvSTATE_hv (next_sv);
720 SAVE (prev, flags);
721 LOAD (next);
722 UNLOCK;
723 1655
724 /* mark this state as in-use */ 1656 /* cannot transfer to destroyed coros, skip and look for next */
725 next->mainstack = 0; 1657 if (expect_false (next->flags & CF_DESTROYED))
726 next->tmps_ix = -2; 1658 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
727 1659 else
728 /* stacklevel changed? if yes, grab the stack for us! */
729 if (flags & TRANSFER_SAVE_CCTXT)
730 { 1660 {
731 if (!prev->stack) 1661 next->flags &= ~CF_READY;
732 allocate_stack (prev, 0); 1662 --coro_nready;
733 else if (prev->cursp != stacklevel 1663
734 && prev->stack->usecnt > 1) 1664 prepare_schedule_to (aTHX_ ta, next);
735 { 1665 break;
736 prev->gencnt = ++prev->stack->gencnt;
737 prev->stack->usecnt = 1;
738 }
739
740 /* has our stack been invalidated? */
741 if (next->stack && next->stack->gencnt != next->gencnt)
742 {
743 deallocate_stack (next);
744 allocate_stack (next, 1);
745 coro_create (&(next->stack->cctx),
746 continue_coro, (void *)next,
747 next->stack->sptr, labs (next->stack->ssize));
748 }
749
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 } 1666 }
754 else
755 next->cursp = stacklevel;
756 } 1667 }
757 else if (next->tmps_ix == -2)
758 croak ("tried to transfer to running coroutine");
759 else 1668 else
760 { 1669 {
761 LOCK; 1670 /* nothing to schedule: call the idle handler */
762 SAVE (prev, -1); /* first get rid of the old state */ 1671 if (SvROK (sv_idle)
763 UNLOCK; 1672 && SvOBJECT (SvRV (sv_idle)))
764
765 if (flags & TRANSFER_SAVE_CCTXT)
766 { 1673 {
767 if (!prev->stack) 1674 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
768 allocate_stack (prev, 0); 1675 api_ready (SvRV (sv_idle));
769 1676 --coro_nready;
770 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771 {
772 PL_top_env = &next->start_env;
773
774 setup_coro (next);
775 next->cursp = stacklevel;
776
777 prev->stack->refcnt++;
778 prev->stack->usecnt++;
779 next->stack = prev->stack;
780 next->gencnt = prev->gencnt;
781 }
782 else
783 {
784 assert (!next->stack);
785 allocate_stack (next, 1);
786 coro_create (&(next->stack->cctx),
787 setup_coro, (void *)next,
788 next->stack->sptr, labs (next->stack->ssize));
789 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790 prev->cursp = stacklevel;
791 /* don't add any code here */
792 }
793 } 1677 }
794 else 1678 else
795 { 1679 {
796 setup_coro (next); 1680 dSP;
797 next->cursp = stacklevel; 1681
1682 ENTER;
1683 SAVETMPS;
1684
1685 PUSHMARK (SP);
1686 PUTBACK;
1687 call_sv (sv_idle, G_VOID | G_DISCARD);
1688
1689 FREETMPS;
1690 LEAVE;
798 } 1691 }
799 } 1692 }
800 } 1693 }
1694}
801 1695
802 LOCK; 1696INLINE void
1697prepare_cede (pTHX_ struct coro_transfer_args *ta)
1698{
1699 api_ready (aTHX_ coro_current);
1700 prepare_schedule (aTHX_ ta);
1701}
1702
1703INLINE void
1704prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1705{
1706 SV *prev = SvRV (coro_current);
1707
803 if (coro_mortal) 1708 if (coro_nready)
804 {
805 SvREFCNT_dec (coro_mortal);
806 coro_mortal = 0;
807 } 1709 {
808 UNLOCK; 1710 prepare_schedule (aTHX_ ta);
809} 1711 api_ready (aTHX_ prev);
810
811#define SV_CORO(sv,func) \
812 do { \
813 if (SvROK (sv)) \
814 sv = SvRV (sv); \
815 \
816 if (SvTYPE (sv) == SVt_PVHV) \
817 { \
818 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819 \
820 if (!he) \
821 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822 \
823 (sv) = SvRV (HeVAL(he)); \
824 } \
825 \
826 /* must also be changed inside Coro::Cont::yield */ \
827 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829 \
830 } while(0)
831
832#define SvSTATE(sv) (struct coro *)SvIV (sv)
833
834static void
835api_transfer(pTHX_ SV *prev, SV *next, int flags)
836{
837 SV_CORO (prev, "Coro::transfer");
838 SV_CORO (next, "Coro::transfer");
839
840 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
841}
842
843/** Coro ********************************************************************/
844
845#define PRIO_MAX 3
846#define PRIO_HIGH 1
847#define PRIO_NORMAL 0
848#define PRIO_LOW -1
849#define PRIO_IDLE -3
850#define PRIO_MIN -4
851
852/* for Coro.pm */
853static GV *coro_current, *coro_idle;
854static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855static int coro_nready;
856
857static void
858coro_enq (pTHX_ SV *sv)
859{
860 if (SvTYPE (sv) == SVt_PVHV)
861 { 1712 }
862 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1713 else
863 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1714 prepare_nop (aTHX_ ta);
1715}
864 1716
865 prio = prio > PRIO_MAX ? PRIO_MAX 1717static void
866 : prio < PRIO_MIN ? PRIO_MIN 1718api_schedule (pTHX)
867 : prio; 1719{
1720 struct coro_transfer_args ta;
868 1721
869 av_push (coro_ready [prio - PRIO_MIN], sv); 1722 prepare_schedule (aTHX_ &ta);
870 coro_nready++; 1723 TRANSFER (ta, 1);
1724}
871 1725
1726static void
1727api_schedule_to (pTHX_ SV *coro_sv)
1728{
1729 struct coro_transfer_args ta;
1730 struct coro *next = SvSTATE (coro_sv);
1731
1732 SvREFCNT_inc_NN (coro_sv);
1733 prepare_schedule_to (aTHX_ &ta, next);
1734}
1735
1736static int
1737api_cede (pTHX)
1738{
1739 struct coro_transfer_args ta;
1740
1741 prepare_cede (aTHX_ &ta);
1742
1743 if (expect_true (ta.prev != ta.next))
1744 {
1745 TRANSFER (ta, 1);
872 return; 1746 return 1;
1747 }
1748 else
1749 return 0;
1750}
1751
1752static int
1753api_cede_notself (pTHX)
1754{
1755 if (coro_nready)
1756 {
1757 struct coro_transfer_args ta;
1758
1759 prepare_cede_notself (aTHX_ &ta);
1760 TRANSFER (ta, 1);
1761 return 1;
1762 }
1763 else
1764 return 0;
1765}
1766
1767static void
1768api_trace (pTHX_ SV *coro_sv, int flags)
1769{
1770 struct coro *coro = SvSTATE (coro_sv);
1771
1772 if (coro->flags & CF_RUNNING)
1773 croak ("cannot enable tracing on a running coroutine, caught");
1774
1775 if (flags & CC_TRACE)
1776 {
1777 if (!coro->cctx)
1778 coro->cctx = cctx_new_run ();
1779 else if (!(coro->cctx->flags & CC_TRACE))
1780 croak ("cannot enable tracing on coroutine with custom stack, caught");
1781
1782 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1783 }
1784 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1785 {
1786 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1787
1788 if (coro->flags & CF_RUNNING)
1789 PL_runops = RUNOPS_DEFAULT;
1790 else
1791 coro->slot->runops = RUNOPS_DEFAULT;
1792 }
1793}
1794
1795static void
1796coro_call_on_destroy (pTHX_ struct coro *coro)
1797{
1798 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1799 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1800
1801 if (on_destroyp)
1802 {
1803 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1804
1805 while (AvFILLp (on_destroy) >= 0)
1806 {
1807 dSP; /* don't disturb outer sp */
1808 SV *cb = av_pop (on_destroy);
1809
1810 PUSHMARK (SP);
1811
1812 if (statusp)
1813 {
1814 int i;
1815 AV *status = (AV *)SvRV (*statusp);
1816 EXTEND (SP, AvFILLp (status) + 1);
1817
1818 for (i = 0; i <= AvFILLp (status); ++i)
1819 PUSHs (AvARRAY (status)[i]);
1820 }
1821
1822 PUTBACK;
1823 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1824 }
1825 }
1826}
1827
1828static void
1829slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1830{
1831 int i;
1832 HV *hv = (HV *)SvRV (coro_current);
1833 AV *av = newAV ();
1834
1835 av_extend (av, items - 1);
1836 for (i = 0; i < items; ++i)
1837 av_push (av, SvREFCNT_inc_NN (arg [i]));
1838
1839 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1840
1841 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1842 api_ready (aTHX_ sv_manager);
1843
1844 frame->prepare = prepare_schedule;
1845 frame->check = slf_check_repeat;
1846}
1847
1848/*****************************************************************************/
1849/* async pool handler */
1850
1851static int
1852slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1853{
1854 HV *hv = (HV *)SvRV (coro_current);
1855 struct coro *coro = (struct coro *)frame->data;
1856
1857 if (!coro->invoke_cb)
1858 return 1; /* loop till we have invoke */
1859 else
1860 {
1861 hv_store (hv, "desc", sizeof ("desc") - 1,
1862 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1863
1864 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1865
1866 {
1867 dSP;
1868 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1869 PUTBACK;
873 } 1870 }
874 1871
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1872 SvREFCNT_dec (GvAV (PL_defgv));
1873 GvAV (PL_defgv) = coro->invoke_av;
1874 coro->invoke_av = 0;
1875
1876 return 0;
1877 }
1878}
1879
1880static void
1881slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1882{
1883 HV *hv = (HV *)SvRV (coro_current);
1884 struct coro *coro = SvSTATE_hv ((SV *)hv);
1885
1886 if (expect_true (coro->saved_deffh))
1887 {
1888 /* subsequent iteration */
1889 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1890 coro->saved_deffh = 0;
1891
1892 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1893 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1894 {
1895 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1896 coro->invoke_av = newAV ();
1897
1898 frame->prepare = prepare_nop;
1899 }
1900 else
1901 {
1902 av_clear (GvAV (PL_defgv));
1903 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1904
1905 coro->prio = 0;
1906
1907 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1908 api_trace (aTHX_ coro_current, 0);
1909
1910 frame->prepare = prepare_schedule;
1911 av_push (av_async_pool, SvREFCNT_inc (hv));
1912 }
1913 }
1914 else
1915 {
1916 /* first iteration, simply fall through */
1917 frame->prepare = prepare_nop;
1918 }
1919
1920 frame->check = slf_check_pool_handler;
1921 frame->data = (void *)coro;
1922}
1923
1924/*****************************************************************************/
1925/* rouse callback */
1926
1927#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1928
1929static void
1930coro_rouse_callback (pTHX_ CV *cv)
1931{
1932 dXSARGS;
1933 SV *data = (SV *)GENSUB_ARG;
1934
1935 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1936 {
1937 /* first call, set args */
1938 AV *av = newAV ();
1939 SV *coro = SvRV (data);
1940
1941 SvRV_set (data, (SV *)av);
1942 api_ready (aTHX_ coro);
1943 SvREFCNT_dec (coro);
1944
1945 /* better take a full copy of the arguments */
1946 while (items--)
1947 av_store (av, items, newSVsv (ST (items)));
1948 }
1949
1950 XSRETURN_EMPTY;
1951}
1952
1953static int
1954slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1955{
1956 SV *data = (SV *)frame->data;
1957
1958 if (CORO_THROW)
1959 return 0;
1960
1961 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1962 return 1;
1963
1964 /* now push all results on the stack */
1965 {
1966 dSP;
1967 AV *av = (AV *)SvRV (data);
1968 int i;
1969
1970 EXTEND (SP, AvFILLp (av) + 1);
1971 for (i = 0; i <= AvFILLp (av); ++i)
1972 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1973
1974 /* we have stolen the elements, so ste length to zero and free */
1975 AvFILLp (av) = -1;
1976 av_undef (av);
1977
1978 PUTBACK;
1979 }
1980
1981 return 0;
1982}
1983
1984static void
1985slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1986{
1987 SV *cb;
1988
1989 if (items)
1990 cb = arg [0];
1991 else
1992 {
1993 struct coro *coro = SvSTATE_current;
1994
1995 if (!coro->rouse_cb)
1996 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1997
1998 cb = sv_2mortal (coro->rouse_cb);
1999 coro->rouse_cb = 0;
2000 }
2001
2002 if (!SvROK (cb)
2003 || SvTYPE (SvRV (cb)) != SVt_PVCV
2004 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2005 croak ("Coro::rouse_wait called with illegal callback argument,");
2006
2007 {
2008 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2009 SV *data = (SV *)GENSUB_ARG;
2010
2011 frame->data = (void *)data;
2012 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2013 frame->check = slf_check_rouse_wait;
2014 }
876} 2015}
877 2016
878static SV * 2017static SV *
879coro_deq (pTHX_ int min_prio) 2018coro_new_rouse_cb (pTHX)
880{ 2019{
881 int prio = PRIO_MAX - PRIO_MIN; 2020 HV *hv = (HV *)SvRV (coro_current);
2021 struct coro *coro = SvSTATE_hv (hv);
2022 SV *data = newRV_inc ((SV *)hv);
2023 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
882 2024
883 min_prio -= PRIO_MIN; 2025 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
884 if (min_prio < 0) 2026 SvREFCNT_dec (data); /* magicext increases the refcount */
885 min_prio = 0;
886 2027
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2028 SvREFCNT_dec (coro->rouse_cb);
888 if (av_len (coro_ready[prio]) >= 0) 2029 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2030
2031 return cb;
2032}
2033
2034/*****************************************************************************/
2035/* schedule-like-function opcode (SLF) */
2036
2037static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2038static const CV *slf_cv;
2039static SV **slf_argv;
2040static int slf_argc, slf_arga; /* count, allocated */
2041static I32 slf_ax; /* top of stack, for restore */
2042
2043/* this restores the stack in the case we patched the entersub, to */
2044/* recreate the stack frame as perl will on following calls */
2045/* since entersub cleared the stack */
2046static OP *
2047pp_restore (pTHX)
2048{
2049 int i;
2050 SV **SP = PL_stack_base + slf_ax;
2051
2052 PUSHMARK (SP);
2053
2054 EXTEND (SP, slf_argc + 1);
2055
2056 for (i = 0; i < slf_argc; ++i)
2057 PUSHs (sv_2mortal (slf_argv [i]));
2058
2059 PUSHs ((SV *)CvGV (slf_cv));
2060
2061 RETURNOP (slf_restore.op_first);
2062}
2063
2064static void
2065slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2066{
2067 SV **arg = (SV **)slf_frame.data;
2068
2069 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2070}
2071
2072static void
2073slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2074{
2075 if (items != 2)
2076 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2077
2078 frame->prepare = slf_prepare_transfer;
2079 frame->check = slf_check_nop;
2080 frame->data = (void *)arg; /* let's hope it will stay valid */
2081}
2082
2083static void
2084slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 frame->prepare = prepare_schedule;
2087 frame->check = slf_check_nop;
2088}
2089
2090static void
2091slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2092{
2093 struct coro *next = (struct coro *)slf_frame.data;
2094
2095 SvREFCNT_inc_NN (next->hv);
2096 prepare_schedule_to (aTHX_ ta, next);
2097}
2098
2099static void
2100slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2101{
2102 if (!items)
2103 croak ("Coro::schedule_to expects a coroutine argument, caught");
2104
2105 frame->data = (void *)SvSTATE (arg [0]);
2106 frame->prepare = slf_prepare_schedule_to;
2107 frame->check = slf_check_nop;
2108}
2109
2110static void
2111slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2112{
2113 api_ready (aTHX_ SvRV (coro_current));
2114
2115 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2116}
2117
2118static void
2119slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2120{
2121 frame->prepare = prepare_cede;
2122 frame->check = slf_check_nop;
2123}
2124
2125static void
2126slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2127{
2128 frame->prepare = prepare_cede_notself;
2129 frame->check = slf_check_nop;
2130}
2131
2132/*
2133 * these not obviously related functions are all rolled into one
2134 * function to increase chances that they all will call transfer with the same
2135 * stack offset
2136 * SLF stands for "schedule-like-function".
2137 */
2138static OP *
2139pp_slf (pTHX)
2140{
2141 I32 checkmark; /* mark SP to see how many elements check has pushed */
2142
2143 /* set up the slf frame, unless it has already been set-up */
2144 /* the latter happens when a new coro has been started */
2145 /* or when a new cctx was attached to an existing coroutine */
2146 if (expect_true (!slf_frame.prepare))
2147 {
2148 /* first iteration */
2149 dSP;
2150 SV **arg = PL_stack_base + TOPMARK + 1;
2151 int items = SP - arg; /* args without function object */
2152 SV *gv = *sp;
2153
2154 /* do a quick consistency check on the "function" object, and if it isn't */
2155 /* for us, divert to the real entersub */
2156 if (SvTYPE (gv) != SVt_PVGV
2157 || !GvCV (gv)
2158 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2159 return PL_ppaddr[OP_ENTERSUB](aTHX);
2160
2161 if (!(PL_op->op_flags & OPf_STACKED))
889 { 2162 {
890 coro_nready--; 2163 /* ampersand-form of call, use @_ instead of stack */
891 return av_shift (coro_ready[prio]); 2164 AV *av = GvAV (PL_defgv);
2165 arg = AvARRAY (av);
2166 items = AvFILLp (av) + 1;
892 } 2167 }
2168
2169 /* now call the init function, which needs to set up slf_frame */
2170 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2171 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2172
2173 /* pop args */
2174 SP = PL_stack_base + POPMARK;
2175
2176 PUTBACK;
2177 }
2178
2179 /* now that we have a slf_frame, interpret it! */
2180 /* we use a callback system not to make the code needlessly */
2181 /* complicated, but so we can run multiple perl coros from one cctx */
2182
2183 do
2184 {
2185 struct coro_transfer_args ta;
2186
2187 slf_frame.prepare (aTHX_ &ta);
2188 TRANSFER (ta, 0);
2189
2190 checkmark = PL_stack_sp - PL_stack_base;
2191 }
2192 while (slf_frame.check (aTHX_ &slf_frame));
2193
2194 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2195
2196 /* exception handling */
2197 if (expect_false (CORO_THROW))
2198 {
2199 SV *exception = sv_2mortal (CORO_THROW);
2200
2201 CORO_THROW = 0;
2202 sv_setsv (ERRSV, exception);
2203 croak (0);
2204 }
2205
2206 /* return value handling - mostly like entersub */
2207 /* make sure we put something on the stack in scalar context */
2208 if (GIMME_V == G_SCALAR)
2209 {
2210 dSP;
2211 SV **bot = PL_stack_base + checkmark;
2212
2213 if (sp == bot) /* too few, push undef */
2214 bot [1] = &PL_sv_undef;
2215 else if (sp != bot + 1) /* too many, take last one */
2216 bot [1] = *sp;
2217
2218 SP = bot + 1;
2219
2220 PUTBACK;
2221 }
2222
2223 return NORMAL;
2224}
2225
2226static void
2227api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2228{
2229 int i;
2230 SV **arg = PL_stack_base + ax;
2231 int items = PL_stack_sp - arg + 1;
2232
2233 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2234
2235 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2236 && PL_op->op_ppaddr != pp_slf)
2237 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2238
2239 CvFLAGS (cv) |= CVf_SLF;
2240 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2241 slf_cv = cv;
2242
2243 /* we patch the op, and then re-run the whole call */
2244 /* we have to put the same argument on the stack for this to work */
2245 /* and this will be done by pp_restore */
2246 slf_restore.op_next = (OP *)&slf_restore;
2247 slf_restore.op_type = OP_CUSTOM;
2248 slf_restore.op_ppaddr = pp_restore;
2249 slf_restore.op_first = PL_op;
2250
2251 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2252
2253 if (PL_op->op_flags & OPf_STACKED)
2254 {
2255 if (items > slf_arga)
2256 {
2257 slf_arga = items;
2258 free (slf_argv);
2259 slf_argv = malloc (slf_arga * sizeof (SV *));
2260 }
2261
2262 slf_argc = items;
2263
2264 for (i = 0; i < items; ++i)
2265 slf_argv [i] = SvREFCNT_inc (arg [i]);
2266 }
2267 else
2268 slf_argc = 0;
2269
2270 PL_op->op_ppaddr = pp_slf;
2271 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2272
2273 PL_op = (OP *)&slf_restore;
2274}
2275
2276/*****************************************************************************/
2277/* PerlIO::cede */
2278
2279typedef struct
2280{
2281 PerlIOBuf base;
2282 NV next, every;
2283} PerlIOCede;
2284
2285static IV
2286PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2287{
2288 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2289
2290 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2291 self->next = nvtime () + self->every;
2292
2293 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2294}
2295
2296static SV *
2297PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2298{
2299 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2300
2301 return newSVnv (self->every);
2302}
2303
2304static IV
2305PerlIOCede_flush (pTHX_ PerlIO *f)
2306{
2307 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2308 double now = nvtime ();
2309
2310 if (now >= self->next)
2311 {
2312 api_cede (aTHX);
2313 self->next = now + self->every;
2314 }
2315
2316 return PerlIOBuf_flush (aTHX_ f);
2317}
2318
2319static PerlIO_funcs PerlIO_cede =
2320{
2321 sizeof(PerlIO_funcs),
2322 "cede",
2323 sizeof(PerlIOCede),
2324 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2325 PerlIOCede_pushed,
2326 PerlIOBuf_popped,
2327 PerlIOBuf_open,
2328 PerlIOBase_binmode,
2329 PerlIOCede_getarg,
2330 PerlIOBase_fileno,
2331 PerlIOBuf_dup,
2332 PerlIOBuf_read,
2333 PerlIOBuf_unread,
2334 PerlIOBuf_write,
2335 PerlIOBuf_seek,
2336 PerlIOBuf_tell,
2337 PerlIOBuf_close,
2338 PerlIOCede_flush,
2339 PerlIOBuf_fill,
2340 PerlIOBase_eof,
2341 PerlIOBase_error,
2342 PerlIOBase_clearerr,
2343 PerlIOBase_setlinebuf,
2344 PerlIOBuf_get_base,
2345 PerlIOBuf_bufsiz,
2346 PerlIOBuf_get_ptr,
2347 PerlIOBuf_get_cnt,
2348 PerlIOBuf_set_ptrcnt,
2349};
2350
2351/*****************************************************************************/
2352/* Coro::Semaphore & Coro::Signal */
2353
2354static SV *
2355coro_waitarray_new (pTHX_ int count)
2356{
2357 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2358 AV *av = newAV ();
2359 SV **ary;
2360
2361 /* unfortunately, building manually saves memory */
2362 Newx (ary, 2, SV *);
2363 AvALLOC (av) = ary;
2364 /*AvARRAY (av) = ary;*/
2365 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2366 AvMAX (av) = 1;
2367 AvFILLp (av) = 0;
2368 ary [0] = newSViv (count);
2369
2370 return newRV_noinc ((SV *)av);
2371}
2372
2373/* semaphore */
2374
2375static void
2376coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2377{
2378 SV *count_sv = AvARRAY (av)[0];
2379 IV count = SvIVX (count_sv);
2380
2381 count += adjust;
2382 SvIVX (count_sv) = count;
2383
2384 /* now wake up as many waiters as are expected to lock */
2385 while (count > 0 && AvFILLp (av) > 0)
2386 {
2387 SV *cb;
2388
2389 /* swap first two elements so we can shift a waiter */
2390 AvARRAY (av)[0] = AvARRAY (av)[1];
2391 AvARRAY (av)[1] = count_sv;
2392 cb = av_shift (av);
2393
2394 if (SvOBJECT (cb))
2395 {
2396 api_ready (aTHX_ cb);
2397 --count;
2398 }
2399 else if (SvTYPE (cb) == SVt_PVCV)
2400 {
2401 dSP;
2402 PUSHMARK (SP);
2403 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2404 PUTBACK;
2405 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2406 }
2407
2408 SvREFCNT_dec (cb);
2409 }
2410}
2411
2412static void
2413coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2414{
2415 /* call $sem->adjust (0) to possibly wake up some other waiters */
2416 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2417}
2418
2419static int
2420slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2421{
2422 AV *av = (AV *)frame->data;
2423 SV *count_sv = AvARRAY (av)[0];
2424
2425 /* if we are about to throw, don't actually acquire the lock, just throw */
2426 if (CORO_THROW)
2427 return 0;
2428 else if (SvIVX (count_sv) > 0)
2429 {
2430 SvSTATE_current->on_destroy = 0;
2431
2432 if (acquire)
2433 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2434 else
2435 coro_semaphore_adjust (aTHX_ av, 0);
2436
2437 return 0;
2438 }
2439 else
2440 {
2441 int i;
2442 /* if we were woken up but can't down, we look through the whole */
2443 /* waiters list and only add us if we aren't in there already */
2444 /* this avoids some degenerate memory usage cases */
2445
2446 for (i = 1; i <= AvFILLp (av); ++i)
2447 if (AvARRAY (av)[i] == SvRV (coro_current))
2448 return 1;
2449
2450 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2451 return 1;
2452 }
2453}
2454
2455static int
2456slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2457{
2458 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2459}
2460
2461static int
2462slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2463{
2464 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2465}
2466
2467static void
2468slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2469{
2470 AV *av = (AV *)SvRV (arg [0]);
2471
2472 if (SvIVX (AvARRAY (av)[0]) > 0)
2473 {
2474 frame->data = (void *)av;
2475 frame->prepare = prepare_nop;
2476 }
2477 else
2478 {
2479 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2480
2481 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2482 frame->prepare = prepare_schedule;
2483
2484 /* to avoid race conditions when a woken-up coro gets terminated */
2485 /* we arrange for a temporary on_destroy that calls adjust (0) */
2486 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2487 }
2488}
2489
2490static void
2491slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2492{
2493 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2494 frame->check = slf_check_semaphore_down;
2495}
2496
2497static void
2498slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2499{
2500 if (items >= 2)
2501 {
2502 /* callback form */
2503 AV *av = (AV *)SvRV (arg [0]);
2504 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2505
2506 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2507
2508 if (SvIVX (AvARRAY (av)[0]) > 0)
2509 coro_semaphore_adjust (aTHX_ av, 0);
2510
2511 frame->prepare = prepare_nop;
2512 frame->check = slf_check_nop;
2513 }
2514 else
2515 {
2516 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2517 frame->check = slf_check_semaphore_wait;
2518 }
2519}
2520
2521/* signal */
2522
2523static void
2524coro_signal_wake (pTHX_ AV *av, int count)
2525{
2526 SvIVX (AvARRAY (av)[0]) = 0;
2527
2528 /* now signal count waiters */
2529 while (count > 0 && AvFILLp (av) > 0)
2530 {
2531 SV *cb;
2532
2533 /* swap first two elements so we can shift a waiter */
2534 cb = AvARRAY (av)[0];
2535 AvARRAY (av)[0] = AvARRAY (av)[1];
2536 AvARRAY (av)[1] = cb;
2537
2538 cb = av_shift (av);
2539
2540 api_ready (aTHX_ cb);
2541 sv_setiv (cb, 0); /* signal waiter */
2542 SvREFCNT_dec (cb);
2543
2544 --count;
2545 }
2546}
2547
2548static int
2549slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2550{
2551 /* if we are about to throw, also stop waiting */
2552 return SvROK ((SV *)frame->data) && !CORO_THROW;
2553}
2554
2555static void
2556slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 AV *av = (AV *)SvRV (arg [0]);
2559
2560 if (SvIVX (AvARRAY (av)[0]))
2561 {
2562 SvIVX (AvARRAY (av)[0]) = 0;
2563 frame->prepare = prepare_nop;
2564 frame->check = slf_check_nop;
2565 }
2566 else
2567 {
2568 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2569
2570 av_push (av, waiter);
2571
2572 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2573 frame->prepare = prepare_schedule;
2574 frame->check = slf_check_signal_wait;
2575 }
2576}
2577
2578/*****************************************************************************/
2579/* Coro::AIO */
2580
2581#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2582
2583/* helper storage struct */
2584struct io_state
2585{
2586 int errorno;
2587 I32 laststype; /* U16 in 5.10.0 */
2588 int laststatval;
2589 Stat_t statcache;
2590};
2591
2592static void
2593coro_aio_callback (pTHX_ CV *cv)
2594{
2595 dXSARGS;
2596 AV *state = (AV *)GENSUB_ARG;
2597 SV *coro = av_pop (state);
2598 SV *data_sv = newSV (sizeof (struct io_state));
2599
2600 av_extend (state, items - 1);
2601
2602 sv_upgrade (data_sv, SVt_PV);
2603 SvCUR_set (data_sv, sizeof (struct io_state));
2604 SvPOK_only (data_sv);
2605
2606 {
2607 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2608
2609 data->errorno = errno;
2610 data->laststype = PL_laststype;
2611 data->laststatval = PL_laststatval;
2612 data->statcache = PL_statcache;
2613 }
2614
2615 /* now build the result vector out of all the parameters and the data_sv */
2616 {
2617 int i;
2618
2619 for (i = 0; i < items; ++i)
2620 av_push (state, SvREFCNT_inc_NN (ST (i)));
2621 }
2622
2623 av_push (state, data_sv);
2624
2625 api_ready (aTHX_ coro);
2626 SvREFCNT_dec (coro);
2627 SvREFCNT_dec ((AV *)state);
2628}
2629
2630static int
2631slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2632{
2633 AV *state = (AV *)frame->data;
2634
2635 /* if we are about to throw, return early */
2636 /* this does not cancel the aio request, but at least */
2637 /* it quickly returns */
2638 if (CORO_THROW)
2639 return 0;
2640
2641 /* one element that is an RV? repeat! */
2642 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2643 return 1;
2644
2645 /* restore status */
2646 {
2647 SV *data_sv = av_pop (state);
2648 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2649
2650 errno = data->errorno;
2651 PL_laststype = data->laststype;
2652 PL_laststatval = data->laststatval;
2653 PL_statcache = data->statcache;
2654
2655 SvREFCNT_dec (data_sv);
2656 }
2657
2658 /* push result values */
2659 {
2660 dSP;
2661 int i;
2662
2663 EXTEND (SP, AvFILLp (state) + 1);
2664 for (i = 0; i <= AvFILLp (state); ++i)
2665 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2666
2667 PUTBACK;
2668 }
893 2669
894 return 0; 2670 return 0;
895} 2671}
896 2672
897static void 2673static void
898api_ready (SV *coro) 2674slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
899{ 2675{
900 dTHX; 2676 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
901
902 if (SvROK (coro))
903 coro = SvRV (coro);
904
905 LOCK;
906 coro_enq (aTHX_ SvREFCNT_inc (coro));
907 UNLOCK;
908}
909
910static void
911api_schedule (void)
912{
913 dTHX;
914
915 SV *prev, *next;
916
917 LOCK;
918
919 prev = SvRV (GvSV (coro_current)); 2677 SV *coro_hv = SvRV (coro_current);
920 next = coro_deq (aTHX_ PRIO_MIN); 2678 struct coro *coro = SvSTATE_hv (coro_hv);
921 2679
922 if (!next) 2680 /* put our coroutine id on the state arg */
923 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2681 av_push (state, SvREFCNT_inc_NN (coro_hv));
924 2682
925 /* free this only after the transfer */ 2683 /* first see whether we have a non-zero priority and set it as AIO prio */
926 coro_mortal = prev; 2684 if (coro->prio)
927 SV_CORO (prev, "Coro::schedule"); 2685 {
2686 dSP;
928 2687
929 SvRV (GvSV (coro_current)) = next; 2688 static SV *prio_cv;
2689 static SV *prio_sv;
930 2690
931 SV_CORO (next, "Coro::schedule"); 2691 if (expect_false (!prio_cv))
2692 {
2693 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2694 prio_sv = newSViv (0);
2695 }
932 2696
933 UNLOCK; 2697 PUSHMARK (SP);
2698 sv_setiv (prio_sv, coro->prio);
2699 XPUSHs (prio_sv);
934 2700
935 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2701 PUTBACK;
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2702 call_sv (prio_cv, G_VOID | G_DISCARD);
937} 2703 }
938 2704
939static void 2705 /* now call the original request */
940api_cede (void) 2706 {
941{ 2707 dSP;
942 dTHX; 2708 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2709 int i;
943 2710
944 LOCK; 2711 PUSHMARK (SP);
945 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946 UNLOCK;
947 2712
948 api_schedule (); 2713 /* first push all args to the stack */
949} 2714 EXTEND (SP, items + 1);
950 2715
2716 for (i = 0; i < items; ++i)
2717 PUSHs (arg [i]);
2718
2719 /* now push the callback closure */
2720 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2721
2722 /* now call the AIO function - we assume our request is uncancelable */
2723 PUTBACK;
2724 call_sv ((SV *)req, G_VOID | G_DISCARD);
2725 }
2726
2727 /* now that the requets is going, we loop toll we have a result */
2728 frame->data = (void *)state;
2729 frame->prepare = prepare_schedule;
2730 frame->check = slf_check_aio_req;
2731}
2732
2733static void
2734coro_aio_req_xs (pTHX_ CV *cv)
2735{
2736 dXSARGS;
2737
2738 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2739
2740 XSRETURN_EMPTY;
2741}
2742
2743/*****************************************************************************/
2744
2745#if CORO_CLONE
2746# include "clone.c"
2747#endif
2748
951MODULE = Coro::State PACKAGE = Coro::State 2749MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952 2750
953PROTOTYPES: ENABLE 2751PROTOTYPES: DISABLE
954 2752
955BOOT: 2753BOOT:
956{ /* {} necessary for stoopid perl-5.6.x */ 2754{
957#ifdef USE_ITHREADS 2755#ifdef USE_ITHREADS
958 MUTEX_INIT (&coro_mutex); 2756# if CORO_PTHREAD
2757 coro_thx = PERL_GET_CONTEXT;
959#endif 2758# endif
2759#endif
2760 BOOT_PAGESIZE;
960 2761
961 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2762 cctx_current = cctx_new_empty ();
962 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2763
2764 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2765 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2766
2767 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2768 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2769 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2770
2771 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2772 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2773 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2774
963 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2775 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964 2776
965 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2777 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2778 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2779 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2780 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969 2781
970 main_mainstack = PL_mainstack; 2782 main_mainstack = PL_mainstack;
2783 main_top_env = PL_top_env;
971 2784
2785 while (main_top_env->je_prev)
2786 main_top_env = main_top_env->je_prev;
2787
2788 {
2789 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2790
2791 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2792 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2793
2794 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2795 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2796 }
2797
972 coroapi.ver = CORO_API_VERSION; 2798 coroapi.ver = CORO_API_VERSION;
2799 coroapi.rev = CORO_API_REVISION;
2800
973 coroapi.transfer = api_transfer; 2801 coroapi.transfer = api_transfer;
974}
975 2802
976Coro::State 2803 coroapi.sv_state = SvSTATE_;
977_newprocess(args) 2804 coroapi.execute_slf = api_execute_slf;
978 SV * args 2805 coroapi.prepare_nop = prepare_nop;
979 PROTOTYPE: $ 2806 coroapi.prepare_schedule = prepare_schedule;
2807 coroapi.prepare_cede = prepare_cede;
2808 coroapi.prepare_cede_notself = prepare_cede_notself;
2809
2810 {
2811 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2812
2813 if (!svp) croak ("Time::HiRes is required");
2814 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2815
2816 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2817 }
2818
2819 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2820}
2821
2822SV *
2823new (char *klass, ...)
2824 ALIAS:
2825 Coro::new = 1
980 CODE: 2826 CODE:
981 Coro__State coro; 2827{
2828 struct coro *coro;
2829 MAGIC *mg;
2830 HV *hv;
2831 CV *cb;
2832 int i;
982 2833
983 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2834 if (items > 1)
984 croak ("Coro::State::_newprocess expects an arrayref");
985 2835 {
2836 cb = coro_sv_2cv (aTHX_ ST (1));
2837
2838 if (!ix)
2839 {
2840 if (CvISXSUB (cb))
2841 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2842
2843 if (!CvROOT (cb))
2844 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2845 }
2846 }
2847
986 Newz (0, coro, 1, struct coro); 2848 Newz (0, coro, 1, struct coro);
2849 coro->args = newAV ();
2850 coro->flags = CF_NEW;
987 2851
988 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2852 if (coro_first) coro_first->prev = coro;
989 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2853 coro->next = coro_first;
990 /*coro->stack = 0;*/ 2854 coro_first = coro;
991 2855
992 /* same as JMPENV_BOOTSTRAP */ 2856 coro->hv = hv = newHV ();
993 /* we might be able to recycle start_env, but safe is safe */ 2857 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
994 /*Zero(&coro->start_env, 1, JMPENV);*/ 2858 mg->mg_flags |= MGf_DUP;
995 coro->start_env.je_ret = -1; 2859 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
996 coro->start_env.je_mustcatch = TRUE;
997 2860
998 RETVAL = coro; 2861 if (items > 1)
2862 {
2863 av_extend (coro->args, items - 1 + ix - 1);
2864
2865 if (ix)
2866 {
2867 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2868 cb = cv_coro_run;
2869 }
2870
2871 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2872
2873 for (i = 2; i < items; i++)
2874 av_push (coro->args, newSVsv (ST (i)));
2875 }
2876}
999 OUTPUT: 2877 OUTPUT:
1000 RETVAL 2878 RETVAL
1001 2879
1002void 2880void
1003transfer(prev, next, flags) 2881transfer (...)
1004 SV *prev
1005 SV *next
1006 int flags
1007 PROTOTYPE: @ 2882 PROTOTYPE: $$
1008 CODE: 2883 CODE:
1009 PUTBACK; 2884 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1010 SV_CORO (next, "Coro::transfer"); 2885
1011 SV_CORO (prev, "Coro::transfer"); 2886bool
1012 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2887_destroy (SV *coro_sv)
1013 SPAGAIN; 2888 CODE:
2889 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2890 OUTPUT:
2891 RETVAL
1014 2892
1015void 2893void
1016DESTROY(coro)
1017 Coro::State coro
1018 CODE:
1019
1020 if (coro->mainstack && coro->mainstack != main_mainstack)
1021 {
1022 struct coro temp;
1023
1024 PUTBACK;
1025 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026 LOAD (aTHX_ coro);
1027 SPAGAIN;
1028
1029 destroy_stacks (aTHX);
1030
1031 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032 SPAGAIN;
1033
1034 coro->mainstack = 0;
1035 }
1036
1037 deallocate_stack (coro);
1038 SvREFCNT_dec (coro->args);
1039 Safefree (coro);
1040
1041void
1042_exit(code) 2894_exit (int code)
1043 int code
1044 PROTOTYPE: $ 2895 PROTOTYPE: $
1045 CODE: 2896 CODE:
1046 _exit (code); 2897 _exit (code);
1047 2898
1048MODULE = Coro::State PACKAGE = Coro::Cont 2899SV *
2900clone (Coro::State coro)
2901 CODE:
2902{
2903#if CORO_CLONE
2904 struct coro *ncoro = coro_clone (coro);
2905 MAGIC *mg;
2906 /* TODO: too much duplication */
2907 ncoro->hv = newHV ();
2908 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2909 mg->mg_flags |= MGf_DUP;
2910 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2911#else
2912 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2913#endif
2914}
2915 OUTPUT:
2916 RETVAL
1049 2917
1050# this is slightly dirty (should expose a c-level api) 2918int
2919cctx_stacksize (int new_stacksize = 0)
2920 PROTOTYPE: ;$
2921 CODE:
2922 RETVAL = cctx_stacksize;
2923 if (new_stacksize)
2924 {
2925 cctx_stacksize = new_stacksize;
2926 ++cctx_gen;
2927 }
2928 OUTPUT:
2929 RETVAL
2930
2931int
2932cctx_max_idle (int max_idle = 0)
2933 PROTOTYPE: ;$
2934 CODE:
2935 RETVAL = cctx_max_idle;
2936 if (max_idle > 1)
2937 cctx_max_idle = max_idle;
2938 OUTPUT:
2939 RETVAL
2940
2941int
2942cctx_count ()
2943 PROTOTYPE:
2944 CODE:
2945 RETVAL = cctx_count;
2946 OUTPUT:
2947 RETVAL
2948
2949int
2950cctx_idle ()
2951 PROTOTYPE:
2952 CODE:
2953 RETVAL = cctx_idle;
2954 OUTPUT:
2955 RETVAL
1051 2956
1052void 2957void
1053yield(...) 2958list ()
1054 PROTOTYPE: @ 2959 PROTOTYPE:
2960 PPCODE:
2961{
2962 struct coro *coro;
2963 for (coro = coro_first; coro; coro = coro->next)
2964 if (coro->hv)
2965 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2966}
2967
2968void
2969call (Coro::State coro, SV *coderef)
2970 ALIAS:
2971 eval = 1
2972 CODE:
2973{
2974 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2975 {
2976 struct coro temp;
2977
2978 if (!(coro->flags & CF_RUNNING))
2979 {
2980 PUTBACK;
2981 save_perl (aTHX_ &temp);
2982 load_perl (aTHX_ coro);
2983 }
2984
2985 {
2986 dSP;
2987 ENTER;
2988 SAVETMPS;
2989 PUTBACK;
2990 PUSHSTACK;
2991 PUSHMARK (SP);
2992
2993 if (ix)
2994 eval_sv (coderef, 0);
2995 else
2996 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2997
2998 POPSTACK;
2999 SPAGAIN;
3000 FREETMPS;
3001 LEAVE;
3002 PUTBACK;
3003 }
3004
3005 if (!(coro->flags & CF_RUNNING))
3006 {
3007 save_perl (aTHX_ coro);
3008 load_perl (aTHX_ &temp);
3009 SPAGAIN;
3010 }
3011 }
3012}
3013
3014SV *
3015is_ready (Coro::State coro)
3016 PROTOTYPE: $
3017 ALIAS:
3018 is_ready = CF_READY
3019 is_running = CF_RUNNING
3020 is_new = CF_NEW
3021 is_destroyed = CF_DESTROYED
3022 CODE:
3023 RETVAL = boolSV (coro->flags & ix);
3024 OUTPUT:
3025 RETVAL
3026
3027void
3028throw (Coro::State self, SV *throw = &PL_sv_undef)
3029 PROTOTYPE: $;$
1055 CODE: 3030 CODE:
1056 SV *yieldstack; 3031{
1057 SV *sv; 3032 struct coro *current = SvSTATE_current;
1058 AV *defav = GvAV (PL_defgv); 3033 SV **throwp = self == current ? &CORO_THROW : &self->except;
1059 struct coro *prev, *next; 3034 SvREFCNT_dec (*throwp);
3035 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3036}
1060 3037
1061 yieldstack = *hv_fetch ( 3038void
1062 (HV *)SvRV (GvSV (coro_current)), 3039api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1063 "yieldstack", sizeof ("yieldstack") - 1, 3040 PROTOTYPE: $;$
3041 C_ARGS: aTHX_ coro, flags
3042
3043SV *
3044has_cctx (Coro::State coro)
3045 PROTOTYPE: $
3046 CODE:
3047 /* maybe manage the running flag differently */
3048 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3049 OUTPUT:
3050 RETVAL
3051
3052int
3053is_traced (Coro::State coro)
3054 PROTOTYPE: $
3055 CODE:
3056 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3057 OUTPUT:
3058 RETVAL
3059
3060UV
3061rss (Coro::State coro)
3062 PROTOTYPE: $
3063 ALIAS:
3064 usecount = 1
3065 CODE:
3066 switch (ix)
3067 {
3068 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3069 case 1: RETVAL = coro->usecount; break;
1064 0 3070 }
3071 OUTPUT:
3072 RETVAL
3073
3074void
3075force_cctx ()
3076 PROTOTYPE:
3077 CODE:
3078 cctx_current->idle_sp = 0;
3079
3080void
3081swap_defsv (Coro::State self)
3082 PROTOTYPE: $
3083 ALIAS:
3084 swap_defav = 1
3085 CODE:
3086 if (!self->slot)
3087 croak ("cannot swap state with coroutine that has no saved state,");
3088 else
1065 ); 3089 {
3090 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3091 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1066 3092
1067 /* set up @_ -- ugly */ 3093 SV *tmp = *src; *src = *dst; *dst = tmp;
1068 av_clear (defav); 3094 }
1069 av_fill (defav, items - 1);
1070 while (items--)
1071 av_store (defav, items, SvREFCNT_inc (ST(items)));
1072 3095
1073 sv = av_pop ((AV *)SvRV (yieldstack));
1074 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076 SvREFCNT_dec (sv);
1077
1078 transfer (aTHX_ prev, next, 0);
1079 3096
1080MODULE = Coro::State PACKAGE = Coro 3097MODULE = Coro::State PACKAGE = Coro
1081 3098
1082# this is slightly dirty (should expose a c-level api)
1083
1084BOOT: 3099BOOT:
1085{ 3100{
1086 int i; 3101 int i;
3102
3103 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3104 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3105 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3106 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3107 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3108 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3109 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3110 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3111 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3112
3113 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3114 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3115 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3116 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3117
1087 HV *stash = gv_stashpv ("Coro", TRUE); 3118 coro_stash = gv_stashpv ("Coro", TRUE);
1088 3119
1089 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3120 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3121 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3122 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3123 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3124 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3125 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095
1096 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1097 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1098 3126
1099 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3127 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1100 coro_ready[i] = newAV (); 3128 coro_ready[i] = newAV ();
1101 3129
1102 { 3130 {
1103 SV *sv = perl_get_sv("Coro::API", 1); 3131 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1104 3132
1105 coroapi.schedule = api_schedule; 3133 coroapi.schedule = api_schedule;
3134 coroapi.schedule_to = api_schedule_to;
1106 coroapi.cede = api_cede; 3135 coroapi.cede = api_cede;
3136 coroapi.cede_notself = api_cede_notself;
1107 coroapi.ready = api_ready; 3137 coroapi.ready = api_ready;
3138 coroapi.is_ready = api_is_ready;
1108 coroapi.nready = &coro_nready; 3139 coroapi.nready = coro_nready;
1109 coroapi.current = coro_current; 3140 coroapi.current = coro_current;
1110 3141
1111 GCoroAPI = &coroapi; 3142 /*GCoroAPI = &coroapi;*/
1112 sv_setiv(sv, (IV)&coroapi); 3143 sv_setiv (sv, (IV)&coroapi);
1113 SvREADONLY_on(sv); 3144 SvREADONLY_on (sv);
1114 } 3145 }
1115} 3146}
1116 3147
1117#if !PERL_MICRO
1118
1119void 3148void
1120ready(self) 3149terminate (...)
1121 SV * self 3150 CODE:
3151 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3152
3153void
3154schedule (...)
3155 CODE:
3156 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3157
3158void
3159schedule_to (...)
3160 CODE:
3161 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3162
3163void
3164cede_to (...)
3165 CODE:
3166 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3167
3168void
3169cede (...)
3170 CODE:
3171 CORO_EXECUTE_SLF_XS (slf_init_cede);
3172
3173void
3174cede_notself (...)
3175 CODE:
3176 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3177
3178void
3179_cancel (Coro::State self)
3180 CODE:
3181 coro_state_destroy (aTHX_ self);
3182 coro_call_on_destroy (aTHX_ self);
3183
3184void
3185_set_current (SV *current)
1122 PROTOTYPE: $ 3186 PROTOTYPE: $
1123 CODE: 3187 CODE:
1124 api_ready (self); 3188 SvREFCNT_dec (SvRV (coro_current));
3189 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1125 3190
1126#endif 3191void
3192_set_readyhook (SV *hook)
3193 PROTOTYPE: $
3194 CODE:
3195 SvREFCNT_dec (coro_readyhook);
3196 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1127 3197
1128int 3198int
3199prio (Coro::State coro, int newprio = 0)
3200 PROTOTYPE: $;$
3201 ALIAS:
3202 nice = 1
3203 CODE:
3204{
3205 RETVAL = coro->prio;
3206
3207 if (items > 1)
3208 {
3209 if (ix)
3210 newprio = coro->prio - newprio;
3211
3212 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3213 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3214
3215 coro->prio = newprio;
3216 }
3217}
3218 OUTPUT:
3219 RETVAL
3220
3221SV *
3222ready (SV *self)
3223 PROTOTYPE: $
3224 CODE:
3225 RETVAL = boolSV (api_ready (aTHX_ self));
3226 OUTPUT:
3227 RETVAL
3228
3229int
1129nready(...) 3230nready (...)
1130 PROTOTYPE: 3231 PROTOTYPE:
1131 CODE: 3232 CODE:
1132 RETVAL = coro_nready; 3233 RETVAL = coro_nready;
1133 OUTPUT: 3234 OUTPUT:
1134 RETVAL 3235 RETVAL
1135 3236
1136void 3237void
1137schedule(...) 3238_pool_handler (...)
1138 PROTOTYPE:
1139 CODE: 3239 CODE:
1140 api_schedule (); 3240 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1141 3241
1142void 3242void
1143cede(...) 3243async_pool (SV *cv, ...)
1144 PROTOTYPE: 3244 PROTOTYPE: &@
3245 PPCODE:
3246{
3247 HV *hv = (HV *)av_pop (av_async_pool);
3248 AV *av = newAV ();
3249 SV *cb = ST (0);
3250 int i;
3251
3252 av_extend (av, items - 2);
3253 for (i = 1; i < items; ++i)
3254 av_push (av, SvREFCNT_inc_NN (ST (i)));
3255
3256 if ((SV *)hv == &PL_sv_undef)
3257 {
3258 PUSHMARK (SP);
3259 EXTEND (SP, 2);
3260 PUSHs (sv_Coro);
3261 PUSHs ((SV *)cv_pool_handler);
3262 PUTBACK;
3263 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3264 SPAGAIN;
3265
3266 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3267 }
3268
3269 {
3270 struct coro *coro = SvSTATE_hv (hv);
3271
3272 assert (!coro->invoke_cb);
3273 assert (!coro->invoke_av);
3274 coro->invoke_cb = SvREFCNT_inc (cb);
3275 coro->invoke_av = av;
3276 }
3277
3278 api_ready (aTHX_ (SV *)hv);
3279
3280 if (GIMME_V != G_VOID)
3281 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3282 else
3283 SvREFCNT_dec (hv);
3284}
3285
3286SV *
3287rouse_cb ()
3288 PROTOTYPE:
1145 CODE: 3289 CODE:
3290 RETVAL = coro_new_rouse_cb (aTHX);
3291 OUTPUT:
3292 RETVAL
3293
3294void
3295rouse_wait (...)
3296 PROTOTYPE: ;$
3297 PPCODE:
3298 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3299
3300
3301MODULE = Coro::State PACKAGE = PerlIO::cede
3302
3303BOOT:
3304 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3305
3306
3307MODULE = Coro::State PACKAGE = Coro::Semaphore
3308
3309SV *
3310new (SV *klass, SV *count = 0)
3311 CODE:
3312 RETVAL = sv_bless (
3313 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3314 GvSTASH (CvGV (cv))
3315 );
3316 OUTPUT:
3317 RETVAL
3318
3319# helper for Coro::Channel
3320SV *
3321_alloc (int count)
3322 CODE:
3323 RETVAL = coro_waitarray_new (aTHX_ count);
3324 OUTPUT:
3325 RETVAL
3326
3327SV *
3328count (SV *self)
3329 CODE:
3330 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3331 OUTPUT:
3332 RETVAL
3333
3334void
3335up (SV *self, int adjust = 1)
3336 ALIAS:
3337 adjust = 1
3338 CODE:
3339 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3340
3341void
3342down (...)
3343 CODE:
3344 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3345
3346void
3347wait (...)
3348 CODE:
3349 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3350
3351void
3352try (SV *self)
3353 PPCODE:
3354{
3355 AV *av = (AV *)SvRV (self);
3356 SV *count_sv = AvARRAY (av)[0];
3357 IV count = SvIVX (count_sv);
3358
3359 if (count > 0)
3360 {
3361 --count;
3362 SvIVX (count_sv) = count;
3363 XSRETURN_YES;
3364 }
3365 else
3366 XSRETURN_NO;
3367}
3368
3369void
3370waiters (SV *self)
3371 PPCODE:
3372{
3373 AV *av = (AV *)SvRV (self);
3374 int wcount = AvFILLp (av) + 1 - 1;
3375
3376 if (GIMME_V == G_SCALAR)
3377 XPUSHs (sv_2mortal (newSViv (wcount)));
3378 else
3379 {
3380 int i;
3381 EXTEND (SP, wcount);
3382 for (i = 1; i <= wcount; ++i)
3383 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3384 }
3385}
3386
3387MODULE = Coro::State PACKAGE = Coro::Signal
3388
3389SV *
3390new (SV *klass)
3391 CODE:
3392 RETVAL = sv_bless (
3393 coro_waitarray_new (aTHX_ 0),
3394 GvSTASH (CvGV (cv))
3395 );
3396 OUTPUT:
3397 RETVAL
3398
3399void
3400wait (...)
3401 CODE:
3402 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3403
3404void
3405broadcast (SV *self)
3406 CODE:
3407{
3408 AV *av = (AV *)SvRV (self);
3409 coro_signal_wake (aTHX_ av, AvFILLp (av));
3410}
3411
3412void
3413send (SV *self)
3414 CODE:
3415{
3416 AV *av = (AV *)SvRV (self);
3417
3418 if (AvFILLp (av))
3419 coro_signal_wake (aTHX_ av, 1);
3420 else
3421 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3422}
3423
3424IV
3425awaited (SV *self)
3426 CODE:
3427 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3428 OUTPUT:
3429 RETVAL
3430
3431
3432MODULE = Coro::State PACKAGE = Coro::AnyEvent
3433
3434BOOT:
3435 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3436
3437void
3438_schedule (...)
3439 CODE:
3440{
3441 static int incede;
3442
1146 api_cede (); 3443 api_cede_notself (aTHX);
1147 3444
3445 ++incede;
3446 while (coro_nready >= incede && api_cede (aTHX))
3447 ;
3448
3449 sv_setsv (sv_activity, &PL_sv_undef);
3450 if (coro_nready >= incede)
3451 {
3452 PUSHMARK (SP);
3453 PUTBACK;
3454 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3455 }
3456
3457 --incede;
3458}
3459
3460
3461MODULE = Coro::State PACKAGE = Coro::AIO
3462
3463void
3464_register (char *target, char *proto, SV *req)
3465 CODE:
3466{
3467 CV *req_cv = coro_sv_2cv (aTHX_ req);
3468 /* newXSproto doesn't return the CV on 5.8 */
3469 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3470 sv_setpv ((SV *)slf_cv, proto);
3471 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3472}
3473

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