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Comparing Coro/Coro/State.xs (file contents):
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC vs.
Revision 1.430 by root, Wed Dec 19 23:36:16 2012 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
11#include <stdio.h> 22#include <stdio.h>
12#include <errno.h> 23#include <errno.h>
13#include <assert.h> 24#include <assert.h>
14 25
15#ifdef HAVE_MMAP 26#ifndef SVs_PADSTALE
16# include <unistd.h> 27# define SVs_PADSTALE 0
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
24# endif 38# endif
25# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
29static long pagesize; 43# define PadMAX AvFILLp
30# else 44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
33#else 53#else
34# define PAGESIZE 0 54# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif 55#endif
37 56
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif
44
45/* the maximum number of idle cctx that will be pooled */ 57/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 58static int cctx_max_idle = 4;
47 59
48#define PERL_VERSION_ATLEAST(a,b,c) \ 60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 61# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif 62#endif
87 63
88/* prefer perl internal functions over our own? */ 64/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 65#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 67#endif
92 68
93/* The next macros try to return the current stack pointer, in an as 69/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 70 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3 71#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 72# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 73# define STACKLEVEL __builtin_frame_address (0)
103#else 74#else
104# define attribute(x) 75# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 76# define STACKLEVEL ((void *)&stacklevel)
106#endif 77#endif
107 78
108#define NOINLINE attribute ((noinline)) 79#define IN_DESTRUCT PL_dirty
109 80
110#include "CoroAPI.h" 81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
111 83
112#ifdef USE_ITHREADS 84#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 85# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 86static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 87# endif
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 88#endif
120 89
121/* helper storage struct for Coro::AIO */ 90#ifdef __linux
122struct io_state 91# include <time.h> /* for timespec */
123{ 92# include <syscall.h> /* for SYS_* */
124 int errorno; 93# ifdef SYS_clock_gettime
125 I32 laststype; 94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 95# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 97# endif
98#endif
129 99
100static double (*nvtime)(); /* so why doesn't it take void? */
101static void (*u2time)(pTHX_ UV ret[2]);
102
103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
107
108static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 109static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 112static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
136 125
137/* async_pool helper stuff */ 126/* async_pool helper stuff */
138static SV *sv_pool_rss; 127static SV *sv_pool_rss;
139static SV *sv_pool_size; 128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
141 142
142static struct coro_cctx *cctx_first; 143static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 144static int cctx_count, cctx_idle;
144 145
145enum { 146enum
147{
146 CC_MAPPED = 0x01, 148 CC_MAPPED = 0x01,
147 CC_NOREUSE = 0x02, /* throw this away after tracing */ 149 CC_NOREUSE = 0x02, /* throw this away after tracing */
148 CC_TRACE = 0x04, 150 CC_TRACE = 0x04,
149 CC_TRACE_SUB = 0x08, /* trace sub calls */ 151 CC_TRACE_SUB = 0x08, /* trace sub calls */
150 CC_TRACE_LINE = 0x10, /* trace each statement */ 152 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152}; 154};
153 155
154/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
155typedef struct coro_cctx { 157typedef struct coro_cctx
158{
156 struct coro_cctx *next; 159 struct coro_cctx *next;
157 160
158 /* the stack */ 161 /* the stack */
159 void *sptr; 162 struct coro_stack stack;
160 size_t ssize;
161 163
162 /* cpu state */ 164 /* cpu state */
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
165 JMPENV *top_env; 169 JMPENV *top_env;
166 coro_context cctx; 170 coro_context cctx;
167 171
172 U32 gen;
168#if CORO_USE_VALGRIND 173#if CORO_USE_VALGRIND
169 int valgrind_id; 174 int valgrind_id;
170#endif 175#endif
171 unsigned char flags; 176 unsigned char flags;
172} coro_cctx; 177} coro_cctx;
173 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
174enum { 185enum
186{
175 CF_RUNNING = 0x0001, /* coroutine is running */ 187 CF_RUNNING = 0x0001, /* coroutine is running */
176 CF_READY = 0x0002, /* coroutine is ready */ 188 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */ 189 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
179}; 193};
180 194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
204
181/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
182struct coro { 206struct coro
207{
183 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
184 coro_cctx *cctx; 209 coro_cctx *cctx;
185 210
211 /* ready queue */
212 struct coro *next_ready;
213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
216 AV *mainstack;
217 perl_slots *slot; /* basically the saved sp */
218
219 CV *startcv; /* the CV to execute */
186 /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
187 AV *args;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */ 221 int flags; /* CF_ flags */
191 222 HV *hv; /* the perl hash associated with this coro, if any */
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name;
201# include "state.h"
202#undef VAR
203 223
204 /* statistics */ 224 /* statistics */
205 int usecount; /* number of switches to this coro */ 225 int usecount; /* number of transfers to this coro */
206 226
207 /* coro process data */ 227 /* coro process data */
208 int prio; 228 int prio;
229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
233
234 /* async_pool */
235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
209 248
210 /* linked list */ 249 /* linked list */
211 struct coro *next, *prev; 250 struct coro *next, *prev;
212 HV *hv; /* the perl hash associated with this coro, if any */
213}; 251};
214 252
215typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
216typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
217 255
256/* the following variables are effectively part of the perl context */
257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
218/** Coro ********************************************************************/ 261/** Coro ********************************************************************/
219 262
220#define PRIO_MAX 3 263#define CORO_PRIO_MAX 3
221#define PRIO_HIGH 1 264#define CORO_PRIO_HIGH 1
222#define PRIO_NORMAL 0 265#define CORO_PRIO_NORMAL 0
223#define PRIO_LOW -1 266#define CORO_PRIO_LOW -1
224#define PRIO_IDLE -3 267#define CORO_PRIO_IDLE -3
225#define PRIO_MIN -4 268#define CORO_PRIO_MIN -4
226 269
227/* for Coro.pm */ 270/* for Coro.pm */
228static SV *coro_current; 271static SV *coro_current;
229static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 272static SV *coro_readyhook;
230static int coro_nready; 273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
231static struct coro *coro_first; 275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if ECB_AMD64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
232 372
233/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
234 374
235static AV * 375static SV * ecb_noinline
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV * ecb_noinline
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV * ecb_noinline
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405ecb_inline void
406coro_times_update (void)
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428ecb_inline void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440ecb_inline void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
236coro_clone_padlist (pTHX_ CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
237{ 512{
238 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
239 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET const off = PadlistMAX (padlist) + 1;
240 517
241 newpadlist = newAV (); 518 newPADLIST(newpadlist);
519#if !PERL_VERSION_ATLEAST(5,15,3)
520 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
242 AvREAL_off (newpadlist); 521 AvREAL_off (newpadlist);
522#endif
243#if PERL_VERSION_ATLEAST (5,9,0) 523#if PERL_VERSION_ATLEAST (5,10,0)
244 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 524 Perl_pad_push (aTHX_ padlist, off);
245#else 525#else
246 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 526 Perl_pad_push (aTHX_ padlist, off, 1);
247#endif 527#endif
248 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 528 newpad = PadlistARRAY (padlist)[off];
249 --AvFILLp (padlist); 529 PadlistMAX (padlist) = off - 1;
250 530
251 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 531 /* Already extended to 2 elements by newPADLIST. */
252 av_store (newpadlist, 1, (SV *)newpad); 532 PadlistMAX (newpadlist) = 1;
533 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
534 PadlistARRAY (newpadlist)[1] = newpad;
253 535
254 return newpadlist; 536 return newpadlist;
255} 537}
256 538
257static void 539ecb_inline void
258free_padlist (pTHX_ AV *padlist) 540free_padlist (pTHX_ PADLIST *padlist)
259{ 541{
260 /* may be during global destruction */ 542 /* may be during global destruction */
261 if (SvREFCNT (padlist)) 543 if (!IN_DESTRUCT)
262 { 544 {
263 I32 i = AvFILLp (padlist); 545 I32 i = PadlistMAX (padlist);
264 while (i >= 0) 546
547 while (i > 0) /* special-case index 0 */
265 { 548 {
266 SV **svp = av_fetch (padlist, i--, FALSE); 549 /* we try to be extra-careful here */
267 if (svp) 550 PAD *pad = PadlistARRAY (padlist)[i--];
268 { 551 I32 j = PadMAX (pad);
269 SV *sv;
270 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
271 SvREFCNT_dec (sv);
272 552
553 while (j >= 0)
554 SvREFCNT_dec (PadARRAY (pad)[j--]);
555
556 PadMAX (pad) = -1;
273 SvREFCNT_dec (*svp); 557 SvREFCNT_dec (pad);
274 }
275 } 558 }
276 559
560 SvREFCNT_dec (PadlistNAMES (padlist));
561
562#ifdef NEWPADAPI
563 Safefree (PadlistARRAY (padlist));
564 Safefree (padlist);
565#else
566 AvFILLp (padlist) = -1;
567 AvREAL_off (padlist);
277 SvREFCNT_dec ((SV*)padlist); 568 SvREFCNT_dec ((SV*)padlist);
569#endif
278 } 570 }
279} 571}
280 572
281static int 573static int
282coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
283{ 575{
284 AV *padlist; 576 PADLIST *padlist;
285 AV *av = (AV *)mg->mg_obj; 577 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
578 size_t len = *(size_t *)mg->mg_ptr;
286 579
287 /* casting is fun. */ 580 /* perl manages to free our internal AV and _then_ call us */
288 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 581 if (IN_DESTRUCT)
582 return 0;
583
584 while (len--)
289 free_padlist (aTHX_ padlist); 585 free_padlist (aTHX_ padlists[len]);
290
291 SvREFCNT_dec (av);
292 586
293 return 0; 587 return 0;
294} 588}
295 589
296#define PERL_MAGIC_coro PERL_MAGIC_ext 590static MGVTBL coro_cv_vtbl = {
297 591 0, 0, 0, 0,
298static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 592 coro_cv_free
299 593};
300#define CORO_MAGIC(cv) \
301 SvMAGIC (cv) \
302 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
303 ? SvMAGIC (cv) \
304 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
305 : 0
306
307static struct coro *
308SvSTATE_ (pTHX_ SV *coro)
309{
310 HV *stash;
311 MAGIC *mg;
312
313 if (SvROK (coro))
314 coro = SvRV (coro);
315
316 if (SvTYPE (coro) != SVt_PVHV)
317 croak ("Coro::State object required");
318
319 stash = SvSTASH (coro);
320 if (stash != coro_stash && stash != coro_state_stash)
321 {
322 /* very slow, but rare, check */
323 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
324 croak ("Coro::State object required");
325 }
326
327 mg = CORO_MAGIC (coro);
328 return (struct coro *)mg->mg_ptr;
329}
330
331#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
332 594
333/* the next two functions merely cache the padlists */ 595/* the next two functions merely cache the padlists */
334static void 596ecb_inline void
335get_padlist (pTHX_ CV *cv) 597get_padlist (pTHX_ CV *cv)
336{ 598{
337 MAGIC *mg = CORO_MAGIC (cv); 599 MAGIC *mg = CORO_MAGIC_cv (cv);
338 AV *av; 600 size_t *lenp;
339 601
340 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 602 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
341 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 603 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
342 else 604 else
343 { 605 {
344#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
345 /* this is probably cleaner, but also slower? */ 607 /* this is probably cleaner? but also slower! */
608 /* in practise, it seems to be less stable */
346 CV *cp = Perl_cv_clone (cv); 609 CV *cp = Perl_cv_clone (aTHX_ cv);
347 CvPADLIST (cv) = CvPADLIST (cp); 610 CvPADLIST (cv) = CvPADLIST (cp);
348 CvPADLIST (cp) = 0; 611 CvPADLIST (cp) = 0;
349 SvREFCNT_dec (cp); 612 SvREFCNT_dec (cp);
350#else 613#else
351 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 614 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
352#endif 615#endif
353 } 616 }
354} 617}
355 618
356static void 619ecb_inline void
357put_padlist (pTHX_ CV *cv) 620put_padlist (pTHX_ CV *cv)
358{ 621{
359 MAGIC *mg = CORO_MAGIC (cv); 622 MAGIC *mg = CORO_MAGIC_cv (cv);
360 AV *av;
361 623
362 if (!mg) 624 if (ecb_expect_false (!mg))
363 {
364 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
365 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
366 mg->mg_virtual = &vtbl_coro;
367 mg->mg_obj = (SV *)newAV ();
368 } 625 {
626 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
627 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
628 mg->mg_len = 1; /* so mg_free frees mg_ptr */
629 }
630 else
631 Renew (mg->mg_ptr,
632 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
633 char);
369 634
370 av = (AV *)mg->mg_obj; 635 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
371
372 if (AvFILLp (av) >= AvMAX (av))
373 av_extend (av, AvMAX (av) + 1);
374
375 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
376} 636}
377 637
378/** load & save, init *******************************************************/ 638/** load & save, init *******************************************************/
379 639
380#define SB do { 640ecb_inline void
381#define SE } while (0) 641swap_sv (SV *a, SV *b)
642{
643 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
644 SV tmp;
382 645
383#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 646 /* swap sv_any */
647 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
648
649 /* swap sv_flags */
650 SvFLAGS (&tmp) = SvFLAGS (a);
651 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
652 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
653
654#if PERL_VERSION_ATLEAST (5,10,0)
655 /* perl 5.10 and later complicates this _quite_ a bit, but it also
656 * is much faster, so no quarrels here. alternatively, we could
657 * sv_upgrade to avoid this.
658 */
659 {
660 /* swap sv_u */
661 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
662
663 /* if SvANY points to the head, we need to adjust the pointers,
664 * as the pointer for a still points to b, and maybe vice versa.
665 */
666 #define svany_in_head(type) \
667 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
668
669 if (svany_in_head (SvTYPE (a)))
670 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
671
672 if (svany_in_head (SvTYPE (b)))
673 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
674 }
675#endif
676}
677
678/* swap sv heads, at least logically */
679static void
680swap_svs (pTHX_ Coro__State c)
681{
682 int i;
683
684 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
685 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
686}
687
688#define SWAP_SVS(coro) \
689 if (ecb_expect_false ((coro)->swap_sv)) \
690 swap_svs (aTHX_ (coro))
691
692static void
693on_enterleave_call (pTHX_ SV *cb);
384 694
385static void 695static void
386load_perl (pTHX_ Coro__State c) 696load_perl (pTHX_ Coro__State c)
387{ 697{
388#define VAR(name,type) PL_ ## name = c->name; 698 perl_slots *slot = c->slot;
699 c->slot = 0;
700
701 PL_mainstack = c->mainstack;
702
703#if CORO_JIT
704 load_perl_slots (slot);
705#else
706 #define VARx(name,expr,type) expr = slot->name;
389# include "state.h" 707 #include "state.h"
390#undef VAR 708#endif
391
392 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
393 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
394 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
395 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
396
397 if (c->irssv)
398 {
399 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
400 {
401 SvREFCNT_dec (c->irssv);
402 c->irssv = 0;
403 }
404 else
405 {
406 REPLACE_SV (PL_rs, c->irssv);
407 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
408 sv_setsv (c->irssv_sv, PL_rs);
409 }
410 }
411 709
412 { 710 {
413 dSP; 711 dSP;
712
414 CV *cv; 713 CV *cv;
415 714
416 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
417 while ((cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
418 { 717 {
419 put_padlist (aTHX_ cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
420 CvDEPTH (cv) = PTR2IV (POPs); 719 CvDEPTH (cv) = PTR2IV (POPs);
421 CvPADLIST (cv) = (AV *)POPs; 720 CvPADLIST (cv) = (PADLIST *)POPs;
422 } 721 }
423 722
424 PUTBACK; 723 PUTBACK;
425 } 724 }
725
726 slf_frame = c->slf_frame;
727 CORO_THROW = c->except;
728
729 if (ecb_expect_false (enable_times))
730 {
731 if (ecb_expect_false (!times_valid))
732 coro_times_update ();
733
734 coro_times_sub (c);
735 }
736
737 if (ecb_expect_false (c->on_enter))
738 {
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
742 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
743 }
744
745 SWAP_SVS (c);
426} 746}
427 747
428static void 748static void
429save_perl (pTHX_ Coro__State c) 749save_perl (pTHX_ Coro__State c)
430{ 750{
751 SWAP_SVS (c);
752
753 if (ecb_expect_false (c->on_leave))
754 {
755 int i;
756
757 for (i = AvFILLp (c->on_leave); i >= 0; --i)
758 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
759 }
760
761 times_valid = 0;
762
763 if (ecb_expect_false (enable_times))
764 {
765 coro_times_update (); times_valid = 1;
766 coro_times_add (c);
767 }
768
769 c->except = CORO_THROW;
770 c->slf_frame = slf_frame;
771
431 { 772 {
432 dSP; 773 dSP;
433 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
434 PERL_CONTEXT *ccstk = cxstack; 775 PERL_CONTEXT *ccstk = cxstack;
435 PERL_SI *top_si = PL_curstackinfo; 776 PERL_SI *top_si = PL_curstackinfo;
… …
441 782
442 XPUSHs (Nullsv); 783 XPUSHs (Nullsv);
443 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
444 for (;;) 785 for (;;)
445 { 786 {
446 while (cxix >= 0) 787 while (ecb_expect_true (cxix >= 0))
447 { 788 {
448 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
449 790
450 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
451 { 792 {
452 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
453 794
454 if (CvDEPTH (cv)) 795 if (ecb_expect_true (CvDEPTH (cv)))
455 { 796 {
456 EXTEND (SP, 3); 797 EXTEND (SP, 3);
457 PUSHs ((SV *)CvPADLIST (cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
458 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
459 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
460 801
461 CvDEPTH (cv) = 0; 802 CvDEPTH (cv) = 0;
462 get_padlist (aTHX_ cv); 803 get_padlist (aTHX_ cv);
463 } 804 }
464 } 805 }
465 } 806 }
466 807
467 if (top_si->si_type == PERLSI_MAIN) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
468 break; 809 break;
469 810
470 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
471 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
472 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
473 } 814 }
474 815
475 PUTBACK; 816 PUTBACK;
476 } 817 }
477 818
478 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 819 /* allocate some space on the context stack for our purposes */
479 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 820 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
480 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 821 {
481 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 822 unsigned int i;
482 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
483 823
484#define VAR(name,type)c->name = PL_ ## name; 824 for (i = 0; i < SLOT_COUNT; ++i)
825 CXINC;
826
827 cxstack_ix -= SLOT_COUNT; /* undo allocation */
828 }
829
830 c->mainstack = PL_mainstack;
831
832 {
833 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
834
835#if CORO_JIT
836 save_perl_slots (slot);
837#else
838 #define VARx(name,expr,type) slot->name = expr;
485# include "state.h" 839 #include "state.h"
486#undef VAR 840#endif
841 }
487} 842}
488 843
489/* 844/*
490 * allocate various perl stacks. This is an exact copy 845 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 846 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 847 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 848 * not usually need a lot of stackspace.
494 */ 849 */
495#if CORO_PREFER_PERL_FUNCTIONS 850#if CORO_PREFER_PERL_FUNCTIONS
496# define coro_init_stacks init_stacks 851# define coro_init_stacks(thx) init_stacks ()
497#else 852#else
498static void 853static void
499coro_init_stacks (pTHX) 854coro_init_stacks (pTHX)
500{ 855{
501 PL_curstackinfo = new_stackinfo(64, 6); 856 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
502 PL_curstackinfo->si_type = PERLSI_MAIN; 857 PL_curstackinfo->si_type = PERLSI_MAIN;
503 PL_curstack = PL_curstackinfo->si_stack; 858 PL_curstack = PL_curstackinfo->si_stack;
504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 859 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505 860
506 PL_stack_base = AvARRAY(PL_curstack); 861 PL_stack_base = AvARRAY(PL_curstack);
507 PL_stack_sp = PL_stack_base; 862 PL_stack_sp = PL_stack_base;
508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 863 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509 864
510 New(50,PL_tmps_stack,64,SV*); 865 New(50,PL_tmps_stack,32,SV*);
511 PL_tmps_floor = -1; 866 PL_tmps_floor = -1;
512 PL_tmps_ix = -1; 867 PL_tmps_ix = -1;
513 PL_tmps_max = 64; 868 PL_tmps_max = 32;
514 869
515 New(54,PL_markstack,16,I32); 870 New(54,PL_markstack,16,I32);
516 PL_markstack_ptr = PL_markstack; 871 PL_markstack_ptr = PL_markstack;
517 PL_markstack_max = PL_markstack + 16; 872 PL_markstack_max = PL_markstack + 16;
518 873
519#ifdef SET_MARK_OFFSET 874#ifdef SET_MARK_OFFSET
520 SET_MARK_OFFSET; 875 SET_MARK_OFFSET;
521#endif 876#endif
522 877
523 New(54,PL_scopestack,16,I32); 878 New(54,PL_scopestack,8,I32);
524 PL_scopestack_ix = 0; 879 PL_scopestack_ix = 0;
525 PL_scopestack_max = 16; 880 PL_scopestack_max = 8;
881#if HAS_SCOPESTACK_NAME
882 New(54,PL_scopestack_name,8,const char*);
883#endif
526 884
527 New(54,PL_savestack,64,ANY); 885 New(54,PL_savestack,24,ANY);
528 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
529 PL_savestack_max = 64; 887 PL_savestack_max = 24;
530 888
531#if !PERL_VERSION_ATLEAST (5,9,0) 889#if !PERL_VERSION_ATLEAST (5,10,0)
532 New(54,PL_retstack,4,OP*); 890 New(54,PL_retstack,4,OP*);
533 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
534 PL_retstack_max = 4; 892 PL_retstack_max = 4;
535#endif 893#endif
536} 894}
… …
538 896
539/* 897/*
540 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
541 */ 899 */
542static void 900static void
543coro_destroy_stacks (pTHX) 901coro_destruct_stacks (pTHX)
544{ 902{
545 if (!IN_DESTRUCT)
546 {
547 /* restore all saved variables and stuff */
548 LEAVE_SCOPE (0);
549 assert (PL_tmps_floor == -1);
550
551 /* free all temporaries */
552 FREETMPS;
553 assert (PL_tmps_ix == -1);
554
555 /* unwind all extra stacks */
556 POPSTACK_TO (PL_mainstack);
557
558 /* unwind main stack */
559 dounwind (-1);
560 }
561
562 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
563 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
564 905
565 while (PL_curstackinfo) 906 while (PL_curstackinfo)
566 { 907 {
… …
575 } 916 }
576 917
577 Safefree (PL_tmps_stack); 918 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 919 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 920 Safefree (PL_scopestack);
921#if HAS_SCOPESTACK_NAME
922 Safefree (PL_scopestack_name);
923#endif
580 Safefree (PL_savestack); 924 Safefree (PL_savestack);
581#if !PERL_VERSION_ATLEAST (5,9,0) 925#if !PERL_VERSION_ATLEAST (5,10,0)
582 Safefree (PL_retstack); 926 Safefree (PL_retstack);
583#endif 927#endif
584} 928}
585 929
930#define CORO_RSS \
931 rss += sizeof (SYM (curstackinfo)); \
932 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
933 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
934 rss += SYM (tmps_max) * sizeof (SV *); \
935 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
936 rss += SYM (scopestack_max) * sizeof (I32); \
937 rss += SYM (savestack_max) * sizeof (ANY);
938
586static size_t 939static size_t
587coro_rss (pTHX_ struct coro *coro) 940coro_rss (pTHX_ struct coro *coro)
588{ 941{
589 size_t rss = sizeof (coro); 942 size_t rss = sizeof (*coro);
590 943
591 if (coro->mainstack) 944 if (coro->mainstack)
592 { 945 {
593 if (coro->flags & CF_RUNNING) 946 if (coro->flags & CF_RUNNING)
594 { 947 {
595 #define VAR(name,type)coro->name = PL_ ## name; 948 #define SYM(sym) PL_ ## sym
596 # include "state.h" 949 CORO_RSS;
597 #undef VAR 950 #undef SYM
598 } 951 }
952 else
953 {
954 #define SYM(sym) coro->slot->sym
955 CORO_RSS;
956 #undef SYM
957 }
958 }
599 959
600 rss += sizeof (coro->curstackinfo); 960 return rss;
601 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 961}
602 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
603 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
604 rss += coro->tmps_max * sizeof (SV *);
605 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
606 rss += coro->scopestack_max * sizeof (I32);
607 rss += coro->savestack_max * sizeof (ANY);
608 962
609#if !PERL_VERSION_ATLEAST (5,9,0) 963/** coroutine stack handling ************************************************/
610 rss += coro->retstack_max * sizeof (OP *); 964
965static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
966static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
967static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
968
969/* apparently < 5.8.8 */
970#ifndef MgPV_nolen_const
971#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
972 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
973 (const char*)(mg)->mg_ptr)
611#endif 974#endif
975
976/*
977 * This overrides the default magic get method of %SIG elements.
978 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
979 * and instead of trying to save and restore the hash elements (extremely slow),
980 * we just provide our own readback here.
981 */
982static int ecb_cold
983coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
984{
985 const char *s = MgPV_nolen_const (mg);
986
987 if (*s == '_')
612 } 988 {
989 SV **svp = 0;
613 990
991 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
992 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
993
994 if (svp)
995 {
996 SV *ssv;
997
998 if (!*svp)
999 ssv = &PL_sv_undef;
1000 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1001 ssv = sv_2mortal (newRV_inc (*svp));
1002 else
1003 ssv = *svp;
1004
1005 sv_setsv (sv, ssv);
1006 return 0;
1007 }
1008 }
1009
1010 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1011}
1012
1013static int ecb_cold
1014coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1015{
1016 const char *s = MgPV_nolen_const (mg);
1017
1018 if (*s == '_')
1019 {
1020 SV **svp = 0;
1021
1022 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1023 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1024
1025 if (svp)
1026 {
1027 SV *old = *svp;
1028 *svp = 0;
1029 SvREFCNT_dec (old);
1030 return 0;
1031 }
1032 }
1033
1034 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1035}
1036
1037static int ecb_cold
1038coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1039{
1040 const char *s = MgPV_nolen_const (mg);
1041
1042 if (*s == '_')
1043 {
1044 SV **svp = 0;
1045
1046 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1047 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1048
1049 if (svp)
1050 {
1051 SV *old = *svp;
1052 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1053 SvREFCNT_dec (old);
1054 return 0;
1055 }
1056 }
1057
1058 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1059}
1060
1061static void
1062prepare_nop (pTHX_ struct coro_transfer_args *ta)
1063{
1064 /* kind of mega-hacky, but works */
1065 ta->next = ta->prev = (struct coro *)ta;
1066}
1067
1068static int
1069slf_check_nop (pTHX_ struct CoroSLF *frame)
1070{
614 return rss; 1071 return 0;
615} 1072}
616 1073
617/** coroutine stack handling ************************************************/
618
619static void 1074static int
1075slf_check_repeat (pTHX_ struct CoroSLF *frame)
1076{
1077 return 1;
1078}
1079
1080static UNOP init_perl_op;
1081
1082ecb_noinline static void /* noinline to keep it out of the transfer fast path */
620setup_coro (pTHX_ struct coro *coro) 1083init_perl (pTHX_ struct coro *coro)
621{ 1084{
622 /* 1085 /*
623 * emulate part of the perl startup here. 1086 * emulate part of the perl startup here.
624 */ 1087 */
625 coro_init_stacks (aTHX); 1088 coro_init_stacks (aTHX);
626 1089
627 PL_runops = RUNOPS_DEFAULT; 1090 PL_runops = RUNOPS_DEFAULT;
628 PL_curcop = &PL_compiling; 1091 PL_curcop = &PL_compiling;
629 PL_in_eval = EVAL_NULL; 1092 PL_in_eval = EVAL_NULL;
630 PL_comppad = 0; 1093 PL_comppad = 0;
1094 PL_comppad_name = 0;
1095 PL_comppad_name_fill = 0;
1096 PL_comppad_name_floor = 0;
631 PL_curpm = 0; 1097 PL_curpm = 0;
1098 PL_curpad = 0;
632 PL_localizing = 0; 1099 PL_localizing = 0;
633 PL_dirty = 0;
634 PL_restartop = 0; 1100 PL_restartop = 0;
1101#if PERL_VERSION_ATLEAST (5,10,0)
1102 PL_parser = 0;
1103#endif
1104 PL_hints = 0;
1105
1106 /* recreate the die/warn hooks */
1107 PL_diehook = SvREFCNT_inc (rv_diehook);
1108 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1109
1110 GvSV (PL_defgv) = newSV (0);
1111 GvAV (PL_defgv) = coro->args; coro->args = 0;
1112 GvSV (PL_errgv) = newSV (0);
1113 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1114 GvHV (PL_hintgv) = 0;
1115 PL_rs = newSVsv (GvSV (irsgv));
1116 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
635 1117
636 { 1118 {
637 dSP; 1119 dSP;
638 LOGOP myop; 1120 UNOP myop;
639 1121
640 SvREFCNT_dec (GvAV (PL_defgv));
641 GvAV (PL_defgv) = coro->args; coro->args = 0;
642
643 Zero (&myop, 1, LOGOP); 1122 Zero (&myop, 1, UNOP);
644 myop.op_next = Nullop; 1123 myop.op_next = Nullop;
1124 myop.op_type = OP_ENTERSUB;
645 myop.op_flags = OPf_WANT_VOID; 1125 myop.op_flags = OPf_WANT_VOID;
646 1126
647 PUSHMARK (SP); 1127 PUSHMARK (SP);
648 XPUSHs (av_shift (GvAV (PL_defgv))); 1128 PUSHs ((SV *)coro->startcv);
649 PUTBACK; 1129 PUTBACK;
650 PL_op = (OP *)&myop; 1130 PL_op = (OP *)&myop;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1131 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653 } 1132 }
654 1133
655 ENTER; /* necessary e.g. for dounwind */ 1134 /* this newly created coroutine might be run on an existing cctx which most
656} 1135 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1136 */
1137 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1138 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1139 slf_frame.destroy = 0;
657 1140
1141 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1142 init_perl_op.op_next = PL_op;
1143 init_perl_op.op_type = OP_ENTERSUB;
1144 init_perl_op.op_ppaddr = pp_slf;
1145 /* no flags etc. required, as an init function won't be called */
1146
1147 PL_op = (OP *)&init_perl_op;
1148
1149 /* copy throw, in case it was set before init_perl */
1150 CORO_THROW = coro->except;
1151
1152 SWAP_SVS (coro);
1153
1154 if (ecb_expect_false (enable_times))
1155 {
1156 coro_times_update ();
1157 coro_times_sub (coro);
1158 }
1159}
1160
658static void 1161static void
1162coro_unwind_stacks (pTHX)
1163{
1164 if (!IN_DESTRUCT)
1165 {
1166 /* restore all saved variables and stuff */
1167 LEAVE_SCOPE (0);
1168 assert (PL_tmps_floor == -1);
1169
1170 /* free all temporaries */
1171 FREETMPS;
1172 assert (PL_tmps_ix == -1);
1173
1174 /* unwind all extra stacks */
1175 POPSTACK_TO (PL_mainstack);
1176
1177 /* unwind main stack */
1178 dounwind (-1);
1179 }
1180}
1181
1182static void
1183destroy_perl (pTHX_ struct coro *coro)
1184{
1185 SV *svf [9];
1186
1187 {
1188 SV *old_current = SvRV (coro_current);
1189 struct coro *current = SvSTATE (old_current);
1190
1191 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1192
1193 save_perl (aTHX_ current);
1194
1195 /* this will cause transfer_check to croak on block*/
1196 SvRV_set (coro_current, (SV *)coro->hv);
1197
1198 load_perl (aTHX_ coro);
1199
1200 coro_unwind_stacks (aTHX);
1201
1202 /* restore swapped sv's */
1203 SWAP_SVS (coro);
1204
1205 coro_destruct_stacks (aTHX);
1206
1207 /* now save some sv's to be free'd later */
1208 svf [0] = GvSV (PL_defgv);
1209 svf [1] = (SV *)GvAV (PL_defgv);
1210 svf [2] = GvSV (PL_errgv);
1211 svf [3] = (SV *)PL_defoutgv;
1212 svf [4] = PL_rs;
1213 svf [5] = GvSV (irsgv);
1214 svf [6] = (SV *)GvHV (PL_hintgv);
1215 svf [7] = PL_diehook;
1216 svf [8] = PL_warnhook;
1217 assert (9 == sizeof (svf) / sizeof (*svf));
1218
1219 SvRV_set (coro_current, old_current);
1220
1221 load_perl (aTHX_ current);
1222 }
1223
1224 {
1225 unsigned int i;
1226
1227 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1228 SvREFCNT_dec (svf [i]);
1229
1230 SvREFCNT_dec (coro->saved_deffh);
1231 SvREFCNT_dec (coro->rouse_cb);
1232 SvREFCNT_dec (coro->invoke_cb);
1233 SvREFCNT_dec (coro->invoke_av);
1234 }
1235}
1236
1237ecb_inline void
659free_coro_mortal (pTHX) 1238free_coro_mortal (pTHX)
660{ 1239{
661 if (coro_mortal) 1240 if (ecb_expect_true (coro_mortal))
662 { 1241 {
663 SvREFCNT_dec (coro_mortal); 1242 SvREFCNT_dec ((SV *)coro_mortal);
664 coro_mortal = 0; 1243 coro_mortal = 0;
665 } 1244 }
666} 1245}
667 1246
668static int 1247static int
669runops_trace (pTHX) 1248runops_trace (pTHX)
670{ 1249{
671 COP *oldcop = 0; 1250 COP *oldcop = 0;
672 int oldcxix = -2; 1251 int oldcxix = -2;
673 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
674 coro_cctx *cctx = coro->cctx;
675 1252
676 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1253 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
677 { 1254 {
678 PERL_ASYNC_CHECK (); 1255 PERL_ASYNC_CHECK ();
679 1256
680 if (cctx->flags & CC_TRACE_ALL) 1257 if (cctx_current->flags & CC_TRACE_ALL)
681 { 1258 {
682 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1259 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
683 { 1260 {
684 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1261 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
685 SV **bot, **top; 1262 SV **bot, **top;
686 AV *av = newAV (); /* return values */ 1263 AV *av = newAV (); /* return values */
687 SV **cb; 1264 SV **cb;
… …
695 bot = PL_stack_base + cx->blk_oldsp + 1; 1272 bot = PL_stack_base + cx->blk_oldsp + 1;
696 top = cx->blk_gimme == G_ARRAY ? SP + 1 1273 top = cx->blk_gimme == G_ARRAY ? SP + 1
697 : cx->blk_gimme == G_SCALAR ? bot + 1 1274 : cx->blk_gimme == G_SCALAR ? bot + 1
698 : bot; 1275 : bot;
699 1276
1277 av_extend (av, top - bot);
700 while (bot < top) 1278 while (bot < top)
701 av_push (av, SvREFCNT_inc (*bot++)); 1279 av_push (av, SvREFCNT_inc_NN (*bot++));
702 1280
703 PL_runops = RUNOPS_DEFAULT; 1281 PL_runops = RUNOPS_DEFAULT;
704 ENTER; 1282 ENTER;
705 SAVETMPS; 1283 SAVETMPS;
706 EXTEND (SP, 3); 1284 EXTEND (SP, 3);
… …
723 1301
724 if (PL_curcop != &PL_compiling) 1302 if (PL_curcop != &PL_compiling)
725 { 1303 {
726 SV **cb; 1304 SV **cb;
727 1305
728 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1306 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
729 { 1307 {
730 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1308 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
731 1309
732 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1310 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
733 { 1311 {
734 runops_proc_t old_runops = PL_runops;
735 dSP; 1312 dSP;
736 GV *gv = CvGV (cx->blk_sub.cv); 1313 GV *gv = CvGV (cx->blk_sub.cv);
737 SV *fullname = sv_2mortal (newSV (0)); 1314 SV *fullname = sv_2mortal (newSV (0));
738 1315
739 if (isGV (gv)) 1316 if (isGV (gv))
… …
744 SAVETMPS; 1321 SAVETMPS;
745 EXTEND (SP, 3); 1322 EXTEND (SP, 3);
746 PUSHMARK (SP); 1323 PUSHMARK (SP);
747 PUSHs (&PL_sv_yes); 1324 PUSHs (&PL_sv_yes);
748 PUSHs (fullname); 1325 PUSHs (fullname);
749 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1326 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
750 PUTBACK; 1327 PUTBACK;
751 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1328 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
752 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1329 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
753 SPAGAIN; 1330 SPAGAIN;
754 FREETMPS; 1331 FREETMPS;
… …
757 } 1334 }
758 1335
759 oldcxix = cxstack_ix; 1336 oldcxix = cxstack_ix;
760 } 1337 }
761 1338
762 if (cctx->flags & CC_TRACE_LINE) 1339 if (cctx_current->flags & CC_TRACE_LINE)
763 { 1340 {
764 dSP; 1341 dSP;
765 1342
766 PL_runops = RUNOPS_DEFAULT; 1343 PL_runops = RUNOPS_DEFAULT;
767 ENTER; 1344 ENTER;
… …
786 1363
787 TAINT_NOT; 1364 TAINT_NOT;
788 return 0; 1365 return 0;
789} 1366}
790 1367
791/* inject a fake call to Coro::State::_cctx_init into the execution */ 1368static struct CoroSLF cctx_ssl_frame;
792/* _cctx_init should be careful, as it could be called at almost any time */
793/* during execution of a perl program */
794static void NOINLINE
795prepare_cctx (pTHX_ coro_cctx *cctx)
796{
797 dSP;
798 LOGOP myop;
799 1369
1370static void
1371slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1372{
1373 ta->prev = 0;
1374}
1375
1376static int
1377slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1378{
1379 *frame = cctx_ssl_frame;
1380
1381 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1382}
1383
1384/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1385static void ecb_noinline
1386cctx_prepare (pTHX)
1387{
800 PL_top_env = &PL_start_env; 1388 PL_top_env = &PL_start_env;
801 1389
802 if (cctx->flags & CC_TRACE) 1390 if (cctx_current->flags & CC_TRACE)
803 PL_runops = runops_trace; 1391 PL_runops = runops_trace;
804 1392
805 Zero (&myop, 1, LOGOP); 1393 /* we already must be executing an SLF op, there is no other valid way
806 myop.op_next = PL_op; 1394 * that can lead to creation of a new cctx */
807 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1395 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1396 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
808 1397
809 PUSHMARK (SP); 1398 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
810 EXTEND (SP, 2); 1399 cctx_ssl_frame = slf_frame;
811 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1400
812 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1401 slf_frame.prepare = slf_prepare_set_stacklevel;
813 PUTBACK; 1402 slf_frame.check = slf_check_set_stacklevel;
814 PL_op = (OP *)&myop; 1403}
815 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1404
816 SPAGAIN; 1405/* the tail of transfer: execute stuff we can only do after a transfer */
1406ecb_inline void
1407transfer_tail (pTHX)
1408{
1409 free_coro_mortal (aTHX);
1410}
1411
1412/* try to exit the same way perl's main function would do */
1413/* we do not bother resetting the environment or other things *7
1414/* that are not, uhm, essential */
1415/* this obviously also doesn't work when perl is embedded */
1416static void ecb_noinline ecb_cold
1417perlish_exit (pTHX)
1418{
1419 int exitstatus = perl_destruct (PL_curinterp);
1420 perl_free (PL_curinterp);
1421 exit (exitstatus);
817} 1422}
818 1423
819/* 1424/*
820 * this is a _very_ stripped down perl interpreter ;) 1425 * this is a _very_ stripped down perl interpreter ;)
821 */ 1426 */
822static void 1427static void
823coro_run (void *arg) 1428cctx_run (void *arg)
824{ 1429{
1430#ifdef USE_ITHREADS
1431# if CORO_PTHREAD
1432 PERL_SET_CONTEXT (coro_thx);
1433# endif
1434#endif
1435 {
825 dTHX; 1436 dTHX;
826 1437
827 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1438 /* normally we would need to skip the entersub here */
828 UNLOCK; 1439 /* not doing so will re-execute it, which is exactly what we want */
829
830 /* we now skip the entersub that lead to transfer() */
831 PL_op = PL_op->op_next; 1440 /* PL_nop = PL_nop->op_next */
832 1441
833 /* inject a fake subroutine call to cctx_init */ 1442 /* inject a fake subroutine call to cctx_init */
834 prepare_cctx (aTHX_ (coro_cctx *)arg); 1443 cctx_prepare (aTHX);
835 1444
1445 /* cctx_run is the alternative tail of transfer() */
1446 transfer_tail (aTHX);
1447
836 /* somebody or something will hit me for both perl_run and PL_restartop */ 1448 /* somebody or something will hit me for both perl_run and PL_restartop */
837 PL_restartop = PL_op; 1449 PL_restartop = PL_op;
838 perl_run (PL_curinterp); 1450 perl_run (PL_curinterp);
839
840 /* 1451 /*
1452 * Unfortunately, there is no way to get at the return values of the
1453 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1454 * runtime errors here, as this is just a random interpreter, not a thread.
1455 */
1456
1457 /*
841 * If perl-run returns we assume exit() was being called or the coro 1458 * If perl-run returns we assume exit() was being called or the coro
842 * fell off the end, which seems to be the only valid (non-bug) 1459 * fell off the end, which seems to be the only valid (non-bug)
843 * reason for perl_run to return. We try to exit by jumping to the 1460 * reason for perl_run to return. We try to mimic whatever perl is normally
844 * bootstrap-time "top" top_env, as we cannot restore the "main" 1461 * doing in that case. YMMV.
845 * coroutine as Coro has no such concept
846 */ 1462 */
847 PL_top_env = main_top_env; 1463 perlish_exit (aTHX);
848 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1464 }
849} 1465}
850 1466
851static coro_cctx * 1467static coro_cctx *
852cctx_new () 1468cctx_new (void)
853{ 1469{
854 coro_cctx *cctx; 1470 coro_cctx *cctx;
855 void *stack_start;
856 size_t stack_size;
857 1471
858 ++cctx_count; 1472 ++cctx_count;
859
860 Newz (0, cctx, 1, coro_cctx); 1473 New (0, cctx, 1, coro_cctx);
861 1474
862#if HAVE_MMAP 1475 cctx->gen = cctx_gen;
1476 cctx->flags = 0;
1477 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
863 1478
864 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1479 return cctx;
865 /* mmap supposedly does allocate-on-write for us */ 1480}
866 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
867 1481
868 if (cctx->sptr != (void *)-1) 1482/* create a new cctx only suitable as source */
869 { 1483static coro_cctx *
870# if CORO_STACKGUARD 1484cctx_new_empty (void)
871 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1485{
872# endif 1486 coro_cctx *cctx = cctx_new ();
873 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1487
874 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1488 cctx->stack.sptr = 0;
875 cctx->flags |= CC_MAPPED; 1489 coro_create (&cctx->cctx, 0, 0, 0, 0);
1490
1491 return cctx;
1492}
1493
1494/* create a new cctx suitable as destination/running a perl interpreter */
1495static coro_cctx *
1496cctx_new_run (void)
1497{
1498 coro_cctx *cctx = cctx_new ();
1499
1500 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
876 } 1501 {
877 else
878#endif
879 {
880 cctx->ssize = coro_stacksize * (long)sizeof (long);
881 New (0, cctx->sptr, coro_stacksize, long);
882
883 if (!cctx->sptr)
884 {
885 perror ("FATAL: unable to allocate stack for coroutine"); 1502 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
886 _exit (EXIT_FAILURE); 1503 _exit (EXIT_FAILURE);
887 }
888
889 stack_start = cctx->sptr;
890 stack_size = cctx->ssize;
891 } 1504 }
892 1505
893 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
894 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1506 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
895 1507
896 return cctx; 1508 return cctx;
897} 1509}
898 1510
899static void 1511static void
900cctx_destroy (coro_cctx *cctx) 1512cctx_destroy (coro_cctx *cctx)
901{ 1513{
902 if (!cctx) 1514 if (!cctx)
903 return; 1515 return;
904 1516
1517 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1518
905 --cctx_count; 1519 --cctx_count;
1520 coro_destroy (&cctx->cctx);
906 1521
907#if CORO_USE_VALGRIND 1522 coro_stack_free (&cctx->stack);
908 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
909#endif
910
911#if HAVE_MMAP
912 if (cctx->flags & CC_MAPPED)
913 munmap (cctx->sptr, cctx->ssize);
914 else
915#endif
916 Safefree (cctx->sptr);
917 1523
918 Safefree (cctx); 1524 Safefree (cctx);
919} 1525}
1526
1527/* wether this cctx should be destructed */
1528#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
920 1529
921static coro_cctx * 1530static coro_cctx *
922cctx_get (pTHX) 1531cctx_get (pTHX)
923{ 1532{
924 while (cctx_first) 1533 while (ecb_expect_true (cctx_first))
925 { 1534 {
926 coro_cctx *cctx = cctx_first; 1535 coro_cctx *cctx = cctx_first;
927 cctx_first = cctx->next; 1536 cctx_first = cctx->next;
928 --cctx_idle; 1537 --cctx_idle;
929 1538
930 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1539 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
931 return cctx; 1540 return cctx;
932 1541
933 cctx_destroy (cctx); 1542 cctx_destroy (cctx);
934 } 1543 }
935 1544
936 return cctx_new (); 1545 return cctx_new_run ();
937} 1546}
938 1547
939static void 1548static void
940cctx_put (coro_cctx *cctx) 1549cctx_put (coro_cctx *cctx)
941{ 1550{
1551 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1552
942 /* free another cctx if overlimit */ 1553 /* free another cctx if overlimit */
943 if (cctx_idle >= MAX_IDLE_CCTX) 1554 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
944 { 1555 {
945 coro_cctx *first = cctx_first; 1556 coro_cctx *first = cctx_first;
946 cctx_first = first->next; 1557 cctx_first = first->next;
947 --cctx_idle; 1558 --cctx_idle;
948 1559
… …
954 cctx_first = cctx; 1565 cctx_first = cctx;
955} 1566}
956 1567
957/** coroutine switching *****************************************************/ 1568/** coroutine switching *****************************************************/
958 1569
959static void NOINLINE 1570static void
960transfer_check (pTHX_ struct coro *prev, struct coro *next) 1571transfer_check (pTHX_ struct coro *prev, struct coro *next)
961{ 1572{
962 if (prev != next) 1573 /* TODO: throwing up here is considered harmful */
1574
1575 if (ecb_expect_true (prev != next))
963 { 1576 {
964 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1577 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
965 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
966 1579
967 if (next->flags & CF_RUNNING) 1580 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
968 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
969
970 if (next->flags & CF_DESTROYED)
971 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
972 1582
1583#if !PERL_VERSION_ATLEAST (5,10,0)
973 if (PL_lex_state != LEX_NOTPARSING) 1584 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
974 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1586#endif
975 } 1587 }
976} 1588}
977 1589
978/* always use the TRANSFER macro */ 1590/* always use the TRANSFER macro */
979static void NOINLINE 1591static void ecb_noinline /* noinline so we have a fixed stackframe */
980transfer (pTHX_ struct coro *prev, struct coro *next) 1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
981{ 1593{
982 dSTACKLEVEL; 1594 dSTACKLEVEL;
983 1595
984 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
985 if (!next) 1597 if (ecb_expect_false (!prev))
986 { 1598 {
987 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1599 cctx_current->idle_sp = STACKLEVEL;
988 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
989 }
990 else if (prev != next)
991 { 1601 }
1602 else if (ecb_expect_true (prev != next))
1603 {
992 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
993 1605
994 if (prev->flags & CF_NEW) 1606 if (ecb_expect_false (prev->flags & CF_NEW))
995 { 1607 {
996 /* create a new empty context */ 1608 /* create a new empty/source context */
997 Newz (0, prev->cctx, 1, coro_cctx);
998 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
999 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
1000 } 1611 }
1001 1612
1002 prev->flags &= ~CF_RUNNING; 1613 prev->flags &= ~CF_RUNNING;
1003 next->flags |= CF_RUNNING; 1614 next->flags |= CF_RUNNING;
1004 1615
1005 LOCK; 1616 /* first get rid of the old state */
1617 save_perl (aTHX_ prev);
1006 1618
1007 if (next->flags & CF_NEW) 1619 if (ecb_expect_false (next->flags & CF_NEW))
1008 { 1620 {
1009 /* need to start coroutine */ 1621 /* need to start coroutine */
1010 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
1011 /* first get rid of the old state */
1012 save_perl (aTHX_ prev);
1013 /* setup coroutine call */ 1623 /* setup coroutine call */
1014 setup_coro (aTHX_ next); 1624 init_perl (aTHX_ next);
1015 } 1625 }
1016 else 1626 else
1627 load_perl (aTHX_ next);
1628
1629 /* possibly untie and reuse the cctx */
1630 if (ecb_expect_true (
1631 cctx_current->idle_sp == STACKLEVEL
1632 && !(cctx_current->flags & CC_TRACE)
1633 && !force_cctx
1634 ))
1017 { 1635 {
1018 /* coroutine already started */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1019 save_perl (aTHX_ prev); 1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1020 load_perl (aTHX_ next); 1638
1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1641 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1642 if (ecb_expect_true (!next->cctx))
1643 next->cctx = cctx_get (aTHX);
1644
1645 cctx_put (cctx_current);
1021 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
1022 1649
1023 prev__cctx = prev->cctx; 1650 ++next->usecount;
1024 1651
1025 /* possibly "free" the cctx */ 1652 cctx_prev = cctx_current;
1026 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1653 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1654
1655 next->cctx = 0;
1656
1657 if (ecb_expect_false (cctx_prev != cctx_current))
1027 { 1658 {
1028 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1659 cctx_prev->top_env = PL_top_env;
1029 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1660 PL_top_env = cctx_current->top_env;
1030 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1031 prev->cctx = 0;
1032
1033 cctx_put (prev__cctx);
1034 } 1662 }
1035 1663
1036 ++next->usecount; 1664 transfer_tail (aTHX);
1037
1038 if (!next->cctx)
1039 next->cctx = cctx_get (aTHX);
1040
1041 if (prev__cctx != next->cctx)
1042 {
1043 prev__cctx->top_env = PL_top_env;
1044 PL_top_env = next->cctx->top_env;
1045 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1046 }
1047
1048 free_coro_mortal (aTHX);
1049 UNLOCK;
1050 } 1665 }
1051} 1666}
1052 1667
1053struct transfer_args
1054{
1055 struct coro *prev, *next;
1056};
1057
1058#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1059#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1060 1670
1061/** high level stuff ********************************************************/ 1671/** high level stuff ********************************************************/
1062 1672
1673/* this function is actually Coro, not Coro::State, but we call it from here */
1674/* because it is convenient - but it hasn't been declared yet for that reason */
1063static int 1675static void
1676coro_call_on_destroy (pTHX_ struct coro *coro);
1677
1678static void
1064coro_state_destroy (pTHX_ struct coro *coro) 1679coro_state_destroy (pTHX_ struct coro *coro)
1065{ 1680{
1066 if (coro->flags & CF_DESTROYED) 1681 if (coro->flags & CF_ZOMBIE)
1067 return 0; 1682 return;
1068 1683
1684 slf_destroy (aTHX_ coro);
1685
1069 coro->flags |= CF_DESTROYED; 1686 coro->flags |= CF_ZOMBIE;
1070 1687
1071 if (coro->flags & CF_READY) 1688 if (coro->flags & CF_READY)
1072 { 1689 {
1073 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1690 /* reduce nready, as destroying a ready coro effectively unreadies it */
1074 /* alternative: look through all ready queues and remove the coro */ 1691 /* alternative: look through all ready queues and remove the coro */
1075 LOCK;
1076 --coro_nready; 1692 --coro_nready;
1077 UNLOCK;
1078 } 1693 }
1079 else 1694 else
1080 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1695 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1081
1082 if (coro->mainstack && coro->mainstack != main_mainstack)
1083 {
1084 struct coro temp;
1085
1086 if (coro->flags & CF_RUNNING)
1087 croak ("FATAL: tried to destroy currently running coroutine");
1088
1089 Zero (&temp, 1, struct coro);
1090 temp.save = CORO_SAVE_ALL;
1091
1092 save_perl (aTHX_ &temp);
1093 load_perl (aTHX_ coro);
1094
1095 coro_destroy_stacks (aTHX);
1096
1097 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1098
1099 coro->mainstack = 0;
1100 }
1101
1102 cctx_destroy (coro->cctx);
1103 SvREFCNT_dec (coro->args);
1104 1696
1105 if (coro->next) coro->next->prev = coro->prev; 1697 if (coro->next) coro->next->prev = coro->prev;
1106 if (coro->prev) coro->prev->next = coro->next; 1698 if (coro->prev) coro->prev->next = coro->next;
1107 if (coro == coro_first) coro_first = coro->next; 1699 if (coro == coro_first) coro_first = coro->next;
1108 1700
1109 return 1; 1701 if (coro->mainstack
1702 && coro->mainstack != main_mainstack
1703 && coro->slot
1704 && !PL_dirty)
1705 destroy_perl (aTHX_ coro);
1706
1707 cctx_destroy (coro->cctx);
1708 SvREFCNT_dec (coro->startcv);
1709 SvREFCNT_dec (coro->args);
1710 SvREFCNT_dec (coro->swap_sv);
1711 SvREFCNT_dec (CORO_THROW);
1712
1713 coro_call_on_destroy (aTHX_ coro);
1714
1715 /* more destruction mayhem in coro_state_free */
1110} 1716}
1111 1717
1112static int 1718static int
1113coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1719coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1114{ 1720{
1115 struct coro *coro = (struct coro *)mg->mg_ptr; 1721 struct coro *coro = (struct coro *)mg->mg_ptr;
1116 mg->mg_ptr = 0; 1722 mg->mg_ptr = 0;
1117 1723
1118 coro->hv = 0;
1119
1120 if (--coro->refcnt < 0)
1121 {
1122 coro_state_destroy (aTHX_ coro); 1724 coro_state_destroy (aTHX_ coro);
1725 SvREFCNT_dec (coro->on_destroy);
1726 SvREFCNT_dec (coro->status);
1727
1123 Safefree (coro); 1728 Safefree (coro);
1124 }
1125 1729
1126 return 0; 1730 return 0;
1127} 1731}
1128 1732
1129static int 1733static int ecb_cold
1130coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1734coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1131{ 1735{
1132 struct coro *coro = (struct coro *)mg->mg_ptr; 1736 /* called when perl clones the current process the slow way (windows process emulation) */
1133 1737 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1134 ++coro->refcnt; 1738 mg->mg_ptr = 0;
1739 mg->mg_virtual = 0;
1135 1740
1136 return 0; 1741 return 0;
1137} 1742}
1138 1743
1139static MGVTBL coro_state_vtbl = { 1744static MGVTBL coro_state_vtbl = {
… …
1146# define MGf_DUP 0 1751# define MGf_DUP 0
1147#endif 1752#endif
1148}; 1753};
1149 1754
1150static void 1755static void
1151prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1756prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1152{ 1757{
1153 ta->prev = SvSTATE (prev_sv); 1758 ta->prev = SvSTATE (prev_sv);
1154 ta->next = SvSTATE (next_sv); 1759 ta->next = SvSTATE (next_sv);
1155 TRANSFER_CHECK (*ta); 1760 TRANSFER_CHECK (*ta);
1156} 1761}
1157 1762
1158static void 1763static void
1159api_transfer (SV *prev_sv, SV *next_sv) 1764api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1765{
1766 struct coro_transfer_args ta;
1767
1768 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1769 TRANSFER (ta, 1);
1770}
1771
1772/** Coro ********************************************************************/
1773
1774ecb_inline void
1775coro_enq (pTHX_ struct coro *coro)
1776{
1777 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1778
1779 SvREFCNT_inc_NN (coro->hv);
1780
1781 coro->next_ready = 0;
1782 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1783 ready [1] = coro;
1784}
1785
1786ecb_inline struct coro *
1787coro_deq (pTHX)
1788{
1789 int prio;
1790
1791 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1792 {
1793 struct coro **ready = coro_ready [prio];
1794
1795 if (ready [0])
1796 {
1797 struct coro *coro = ready [0];
1798 ready [0] = coro->next_ready;
1799 return coro;
1800 }
1801 }
1802
1803 return 0;
1804}
1805
1806static void
1807invoke_sv_ready_hook_helper (void)
1160{ 1808{
1161 dTHX; 1809 dTHX;
1162 struct transfer_args ta; 1810 dSP;
1163 1811
1164 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1812 ENTER;
1165 TRANSFER (ta); 1813 SAVETMPS;
1814
1815 PUSHMARK (SP);
1816 PUTBACK;
1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1818
1819 FREETMPS;
1820 LEAVE;
1166} 1821}
1167 1822
1168static int 1823static int
1169api_save (SV *coro_sv, int new_save) 1824api_ready (pTHX_ SV *coro_sv)
1170{ 1825{
1171 dTHX;
1172 struct coro *coro = SvSTATE (coro_sv); 1826 struct coro *coro = SvSTATE (coro_sv);
1173 int old_save = coro->save;
1174
1175 if (new_save >= 0)
1176 coro->save = new_save;
1177
1178 return old_save;
1179}
1180
1181/** Coro ********************************************************************/
1182
1183static void
1184coro_enq (pTHX_ SV *coro_sv)
1185{
1186 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1187}
1188
1189static SV *
1190coro_deq (pTHX_ int min_prio)
1191{
1192 int prio = PRIO_MAX - PRIO_MIN;
1193
1194 min_prio -= PRIO_MIN;
1195 if (min_prio < 0)
1196 min_prio = 0;
1197
1198 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1199 if (AvFILLp (coro_ready [prio]) >= 0)
1200 return av_shift (coro_ready [prio]);
1201
1202 return 0;
1203}
1204
1205static int
1206api_ready (SV *coro_sv)
1207{
1208 dTHX;
1209 struct coro *coro;
1210
1211 if (SvROK (coro_sv))
1212 coro_sv = SvRV (coro_sv);
1213
1214 coro = SvSTATE (coro_sv);
1215 1827
1216 if (coro->flags & CF_READY) 1828 if (coro->flags & CF_READY)
1217 return 0; 1829 return 0;
1218 1830
1219 coro->flags |= CF_READY; 1831 coro->flags |= CF_READY;
1220 1832
1221 LOCK; 1833 coro_enq (aTHX_ coro);
1222 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1834
1223 ++coro_nready; 1835 if (!coro_nready++)
1224 UNLOCK; 1836 if (coroapi.readyhook)
1837 coroapi.readyhook ();
1225 1838
1226 return 1; 1839 return 1;
1227} 1840}
1228 1841
1229static int 1842static int
1230api_is_ready (SV *coro_sv) 1843api_is_ready (pTHX_ SV *coro_sv)
1231{ 1844{
1232 dTHX;
1233 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1234} 1846}
1235 1847
1236static void 1848/* expects to own a reference to next->hv */
1849ecb_inline void
1237prepare_schedule (pTHX_ struct transfer_args *ta) 1850prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1238{ 1851{
1239 SV *prev_sv, *next_sv;
1240
1241 for (;;)
1242 {
1243 LOCK;
1244 next_sv = coro_deq (aTHX_ PRIO_MIN);
1245
1246 /* nothing to schedule: call the idle handler */
1247 if (!next_sv)
1248 {
1249 dSP;
1250 UNLOCK;
1251
1252 ENTER;
1253 SAVETMPS;
1254
1255 PUSHMARK (SP);
1256 PUTBACK;
1257 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1258
1259 FREETMPS;
1260 LEAVE;
1261 continue;
1262 }
1263
1264 ta->next = SvSTATE (next_sv);
1265
1266 /* cannot transfer to destroyed coros, skip and look for next */
1267 if (ta->next->flags & CF_DESTROYED)
1268 {
1269 UNLOCK;
1270 SvREFCNT_dec (next_sv);
1271 /* coro_nready is already taken care of by destroy */
1272 continue;
1273 }
1274
1275 --coro_nready;
1276 UNLOCK;
1277 break;
1278 }
1279
1280 /* free this only after the transfer */
1281 prev_sv = SvRV (coro_current); 1852 SV *prev_sv = SvRV (coro_current);
1853
1282 ta->prev = SvSTATE (prev_sv); 1854 ta->prev = SvSTATE_hv (prev_sv);
1855 ta->next = next;
1856
1283 TRANSFER_CHECK (*ta); 1857 TRANSFER_CHECK (*ta);
1284 assert (ta->next->flags & CF_READY); 1858
1285 ta->next->flags &= ~CF_READY;
1286 SvRV_set (coro_current, next_sv); 1859 SvRV_set (coro_current, (SV *)next->hv);
1287 1860
1288 LOCK;
1289 free_coro_mortal (aTHX); 1861 free_coro_mortal (aTHX);
1290 coro_mortal = prev_sv; 1862 coro_mortal = prev_sv;
1291 UNLOCK;
1292} 1863}
1293 1864
1294static void 1865static void
1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1867{
1868 for (;;)
1869 {
1870 struct coro *next = coro_deq (aTHX);
1871
1872 if (ecb_expect_true (next))
1873 {
1874 /* cannot transfer to destroyed coros, skip and look for next */
1875 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1877 else
1878 {
1879 next->flags &= ~CF_READY;
1880 --coro_nready;
1881
1882 prepare_schedule_to (aTHX_ ta, next);
1883 break;
1884 }
1885 }
1886 else
1887 {
1888 /* nothing to schedule: call the idle handler */
1889 if (SvROK (sv_idle)
1890 && SvOBJECT (SvRV (sv_idle)))
1891 {
1892 if (SvRV (sv_idle) == SvRV (coro_current))
1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1894
1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1896 api_ready (aTHX_ SvRV (sv_idle));
1897 --coro_nready;
1898 }
1899 else
1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
1914 }
1915 }
1916}
1917
1918ecb_inline void
1295prepare_cede (pTHX_ struct transfer_args *ta) 1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
1296{ 1920{
1297 api_ready (coro_current); 1921 api_ready (aTHX_ coro_current);
1298 prepare_schedule (aTHX_ ta); 1922 prepare_schedule (aTHX_ ta);
1299} 1923}
1300 1924
1925ecb_inline void
1926prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1927{
1928 SV *prev = SvRV (coro_current);
1929
1930 if (coro_nready)
1931 {
1932 prepare_schedule (aTHX_ ta);
1933 api_ready (aTHX_ prev);
1934 }
1935 else
1936 prepare_nop (aTHX_ ta);
1937}
1938
1939static void
1940api_schedule (pTHX)
1941{
1942 struct coro_transfer_args ta;
1943
1944 prepare_schedule (aTHX_ &ta);
1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1956}
1957
1301static int 1958static int
1302prepare_cede_notself (pTHX_ struct transfer_args *ta) 1959api_cede (pTHX)
1303{ 1960{
1304 if (coro_nready) 1961 struct coro_transfer_args ta;
1305 { 1962
1306 SV *prev = SvRV (coro_current);
1307 prepare_schedule (aTHX_ ta); 1963 prepare_cede (aTHX_ &ta);
1308 api_ready (prev); 1964
1965 if (ecb_expect_true (ta.prev != ta.next))
1966 {
1967 TRANSFER (ta, 1);
1309 return 1; 1968 return 1;
1310 } 1969 }
1311 else 1970 else
1312 return 0; 1971 return 0;
1313} 1972}
1314 1973
1315static void
1316api_schedule (void)
1317{
1318 dTHX;
1319 struct transfer_args ta;
1320
1321 prepare_schedule (aTHX_ &ta);
1322 TRANSFER (ta);
1323}
1324
1325static int 1974static int
1326api_cede (void) 1975api_cede_notself (pTHX)
1327{ 1976{
1328 dTHX; 1977 if (coro_nready)
1978 {
1329 struct transfer_args ta; 1979 struct coro_transfer_args ta;
1330 1980
1331 prepare_cede (aTHX_ &ta); 1981 prepare_cede_notself (aTHX_ &ta);
1332
1333 if (ta.prev != ta.next)
1334 {
1335 TRANSFER (ta); 1982 TRANSFER (ta, 1);
1336 return 1; 1983 return 1;
1337 } 1984 }
1338 else 1985 else
1339 return 0; 1986 return 0;
1340} 1987}
1341 1988
1342static int 1989static void
1343api_cede_notself (void)
1344{
1345 dTHX;
1346 struct transfer_args ta;
1347
1348 if (prepare_cede_notself (aTHX_ &ta))
1349 {
1350 TRANSFER (ta);
1351 return 1;
1352 }
1353 else
1354 return 0;
1355}
1356
1357static void
1358api_trace (SV *coro_sv, int flags) 1990api_trace (pTHX_ SV *coro_sv, int flags)
1359{ 1991{
1360 dTHX;
1361 struct coro *coro = SvSTATE (coro_sv); 1992 struct coro *coro = SvSTATE (coro_sv);
1362 1993
1994 if (coro->flags & CF_RUNNING)
1995 croak ("cannot enable tracing on a running coroutine, caught");
1996
1363 if (flags & CC_TRACE) 1997 if (flags & CC_TRACE)
1364 { 1998 {
1365 if (!coro->cctx) 1999 if (!coro->cctx)
1366 coro->cctx = cctx_new (); 2000 coro->cctx = cctx_new_run ();
1367 else if (!(coro->cctx->flags & CC_TRACE)) 2001 else if (!(coro->cctx->flags & CC_TRACE))
1368 croak ("cannot enable tracing on coroutine with custom stack"); 2002 croak ("cannot enable tracing on coroutine with custom stack, caught");
1369 2003
1370 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2004 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1371 } 2005 }
1372 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2006 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1373 { 2007 {
1374 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2008 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1375 2009
1376 if (coro->flags & CF_RUNNING) 2010 if (coro->flags & CF_RUNNING)
1377 PL_runops = RUNOPS_DEFAULT; 2011 PL_runops = RUNOPS_DEFAULT;
1378 else 2012 else
1379 coro->runops = RUNOPS_DEFAULT; 2013 coro->slot->runops = RUNOPS_DEFAULT;
2014 }
2015}
2016
2017static void
2018coro_push_av (pTHX_ AV *av, I32 gimme_v)
2019{
2020 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2021 {
2022 dSP;
2023
2024 if (gimme_v == G_SCALAR)
2025 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2026 else
2027 {
2028 int i;
2029 EXTEND (SP, AvFILLp (av) + 1);
2030
2031 for (i = 0; i <= AvFILLp (av); ++i)
2032 PUSHs (AvARRAY (av)[i]);
2033 }
2034
2035 PUTBACK;
2036 }
2037}
2038
2039static void
2040coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2041{
2042 if (!coro->on_destroy)
2043 coro->on_destroy = newAV ();
2044
2045 av_push (coro->on_destroy, cb);
2046}
2047
2048static void
2049slf_destroy_join (pTHX_ struct CoroSLF *frame)
2050{
2051 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2052}
2053
2054static int
2055slf_check_join (pTHX_ struct CoroSLF *frame)
2056{
2057 struct coro *coro = (struct coro *)frame->data;
2058
2059 if (!coro->status)
2060 return 1;
2061
2062 frame->destroy = 0;
2063
2064 coro_push_av (aTHX_ coro->status, GIMME_V);
2065
2066 SvREFCNT_dec ((SV *)coro->hv);
2067
2068 return 0;
2069}
2070
2071static void
2072slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2073{
2074 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2075
2076 if (items > 1)
2077 croak ("join called with too many arguments");
2078
2079 if (coro->status)
2080 frame->prepare = prepare_nop;
2081 else
2082 {
2083 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2084 frame->prepare = prepare_schedule;
2085 }
2086
2087 frame->check = slf_check_join;
2088 frame->destroy = slf_destroy_join;
2089 frame->data = (void *)coro;
2090 SvREFCNT_inc (coro->hv);
2091}
2092
2093static void
2094coro_call_on_destroy (pTHX_ struct coro *coro)
2095{
2096 AV *od = coro->on_destroy;
2097
2098 if (!od)
2099 return;
2100
2101 while (AvFILLp (od) >= 0)
2102 {
2103 SV *cb = sv_2mortal (av_pop (od));
2104
2105 /* coro hv's (and only hv's at the moment) are supported as well */
2106 if (SvSTATEhv_p (aTHX_ cb))
2107 api_ready (aTHX_ cb);
2108 else
2109 {
2110 dSP; /* don't disturb outer sp */
2111 PUSHMARK (SP);
2112
2113 if (coro->status)
2114 {
2115 PUTBACK;
2116 coro_push_av (aTHX_ coro->status, G_ARRAY);
2117 SPAGAIN;
2118 }
2119
2120 PUTBACK;
2121 call_sv (cb, G_VOID | G_DISCARD);
2122 }
2123 }
2124}
2125
2126static void
2127coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2128{
2129 AV *av;
2130
2131 if (coro->status)
2132 {
2133 av = coro->status;
2134 av_clear (av);
2135 }
2136 else
2137 av = coro->status = newAV ();
2138
2139 /* items are actually not so common, so optimise for this case */
2140 if (items)
2141 {
2142 int i;
2143
2144 av_extend (av, items - 1);
2145
2146 for (i = 0; i < items; ++i)
2147 av_push (av, SvREFCNT_inc_NN (arg [i]));
2148 }
2149}
2150
2151static void
2152slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2153{
2154 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2155 api_ready (aTHX_ sv_manager);
2156
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_repeat;
2159
2160 /* as a minor optimisation, we could unwind all stacks here */
2161 /* but that puts extra pressure on pp_slf, and is not worth much */
2162 /*coro_unwind_stacks (aTHX);*/
2163}
2164
2165static void
2166slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2167{
2168 HV *coro_hv = (HV *)SvRV (coro_current);
2169
2170 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2171 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2172}
2173
2174static void
2175slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 HV *coro_hv;
2178 struct coro *coro;
2179
2180 if (items <= 0)
2181 croak ("Coro::cancel called without coro object,");
2182
2183 coro = SvSTATE (arg [0]);
2184 coro_hv = coro->hv;
2185
2186 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2187
2188 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2189 {
2190 /* coro currently busy cancelling something, so just notify it */
2191 coro->slf_frame.data = (void *)coro;
2192
2193 frame->prepare = prepare_nop;
2194 frame->check = slf_check_nop;
2195 }
2196 else if (coro_hv == (HV *)SvRV (coro_current))
2197 {
2198 /* cancelling the current coro is allowed, and equals terminate */
2199 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2200 }
2201 else
2202 {
2203 struct coro *self = SvSTATE_current;
2204
2205 /* otherwise we cancel directly, purely for speed reasons
2206 * unfortunately, this requires some magic trickery, as
2207 * somebody else could cancel us, so we have to fight the cancellation.
2208 * this is ugly, and hopefully fully worth the extra speed.
2209 * besides, I can't get the slow-but-safe version working...
2210 */
2211 slf_frame.data = 0;
2212 self->flags |= CF_NOCANCEL;
2213 coro_state_destroy (aTHX_ coro);
2214 self->flags &= ~CF_NOCANCEL;
2215
2216 if (slf_frame.data)
2217 {
2218 /* while we were busy we have been cancelled, so terminate */
2219 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2220 }
2221 else
2222 {
2223 frame->prepare = prepare_nop;
2224 frame->check = slf_check_nop;
2225 }
2226 }
2227}
2228
2229static int
2230slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2231{
2232 frame->prepare = 0;
2233 coro_unwind_stacks (aTHX);
2234
2235 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2236
2237 return 1;
2238}
2239
2240static int
2241safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2242{
2243 if (coro->cctx)
2244 croak ("coro inside C callback, unable to cancel at this time, caught");
2245
2246 if (coro->flags & CF_NEW)
2247 {
2248 coro_set_status (aTHX_ coro, arg, items);
2249 coro_state_destroy (aTHX_ coro);
2250 }
2251 else
2252 {
2253 if (!coro->slf_frame.prepare)
2254 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2255
2256 slf_destroy (aTHX_ coro);
2257
2258 coro_set_status (aTHX_ coro, arg, items);
2259 coro->slf_frame.prepare = prepare_nop;
2260 coro->slf_frame.check = slf_check_safe_cancel;
2261
2262 api_ready (aTHX_ (SV *)coro->hv);
2263 }
2264
2265 return 1;
2266}
2267
2268/*****************************************************************************/
2269/* async pool handler */
2270
2271static int
2272slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2273{
2274 HV *hv = (HV *)SvRV (coro_current);
2275 struct coro *coro = (struct coro *)frame->data;
2276
2277 if (!coro->invoke_cb)
2278 return 1; /* loop till we have invoke */
2279 else
2280 {
2281 hv_store (hv, "desc", sizeof ("desc") - 1,
2282 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2283
2284 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2285
2286 {
2287 dSP;
2288 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2289 PUTBACK;
1380 } 2290 }
2291
2292 SvREFCNT_dec (GvAV (PL_defgv));
2293 GvAV (PL_defgv) = coro->invoke_av;
2294 coro->invoke_av = 0;
2295
2296 return 0;
2297 }
1381} 2298}
2299
2300static void
2301slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2302{
2303 HV *hv = (HV *)SvRV (coro_current);
2304 struct coro *coro = SvSTATE_hv ((SV *)hv);
2305
2306 if (ecb_expect_true (coro->saved_deffh))
2307 {
2308 /* subsequent iteration */
2309 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2310 coro->saved_deffh = 0;
2311
2312 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2313 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2314 {
2315 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2316 return;
2317 }
2318 else
2319 {
2320 av_clear (GvAV (PL_defgv));
2321 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2322
2323 coro->prio = 0;
2324
2325 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2326 api_trace (aTHX_ coro_current, 0);
2327
2328 frame->prepare = prepare_schedule;
2329 av_push (av_async_pool, SvREFCNT_inc (hv));
2330 }
2331 }
2332 else
2333 {
2334 /* first iteration, simply fall through */
2335 frame->prepare = prepare_nop;
2336 }
2337
2338 frame->check = slf_check_pool_handler;
2339 frame->data = (void *)coro;
2340}
2341
2342/*****************************************************************************/
2343/* rouse callback */
2344
2345#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2346
2347static void
2348coro_rouse_callback (pTHX_ CV *cv)
2349{
2350 dXSARGS;
2351 SV *data = (SV *)S_GENSUB_ARG;
2352
2353 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2354 {
2355 /* first call, set args */
2356 SV *coro = SvRV (data);
2357 AV *av = newAV ();
2358
2359 SvRV_set (data, (SV *)av);
2360
2361 /* better take a full copy of the arguments */
2362 while (items--)
2363 av_store (av, items, newSVsv (ST (items)));
2364
2365 api_ready (aTHX_ coro);
2366 SvREFCNT_dec (coro);
2367 }
2368
2369 XSRETURN_EMPTY;
2370}
2371
2372static int
2373slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2374{
2375 SV *data = (SV *)frame->data;
2376
2377 if (CORO_THROW)
2378 return 0;
2379
2380 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2381 return 1;
2382
2383 /* now push all results on the stack */
2384 {
2385 dSP;
2386 AV *av = (AV *)SvRV (data);
2387 int i;
2388
2389 EXTEND (SP, AvFILLp (av) + 1);
2390 for (i = 0; i <= AvFILLp (av); ++i)
2391 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2392
2393 /* we have stolen the elements, so set length to zero and free */
2394 AvFILLp (av) = -1;
2395 av_undef (av);
2396
2397 PUTBACK;
2398 }
2399
2400 return 0;
2401}
2402
2403static void
2404slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 SV *cb;
2407
2408 if (items)
2409 cb = arg [0];
2410 else
2411 {
2412 struct coro *coro = SvSTATE_current;
2413
2414 if (!coro->rouse_cb)
2415 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2416
2417 cb = sv_2mortal (coro->rouse_cb);
2418 coro->rouse_cb = 0;
2419 }
2420
2421 if (!SvROK (cb)
2422 || SvTYPE (SvRV (cb)) != SVt_PVCV
2423 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2424 croak ("Coro::rouse_wait called with illegal callback argument,");
2425
2426 {
2427 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2428 SV *data = (SV *)S_GENSUB_ARG;
2429
2430 frame->data = (void *)data;
2431 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2432 frame->check = slf_check_rouse_wait;
2433 }
2434}
2435
2436static SV *
2437coro_new_rouse_cb (pTHX)
2438{
2439 HV *hv = (HV *)SvRV (coro_current);
2440 struct coro *coro = SvSTATE_hv (hv);
2441 SV *data = newRV_inc ((SV *)hv);
2442 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2443
2444 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2445 SvREFCNT_dec (data); /* magicext increases the refcount */
2446
2447 SvREFCNT_dec (coro->rouse_cb);
2448 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2449
2450 return cb;
2451}
2452
2453/*****************************************************************************/
2454/* schedule-like-function opcode (SLF) */
2455
2456static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2457static const CV *slf_cv;
2458static SV **slf_argv;
2459static int slf_argc, slf_arga; /* count, allocated */
2460static I32 slf_ax; /* top of stack, for restore */
2461
2462/* this restores the stack in the case we patched the entersub, to */
2463/* recreate the stack frame as perl will on following calls */
2464/* since entersub cleared the stack */
2465static OP *
2466pp_restore (pTHX)
2467{
2468 int i;
2469 SV **SP = PL_stack_base + slf_ax;
2470
2471 PUSHMARK (SP);
2472
2473 EXTEND (SP, slf_argc + 1);
2474
2475 for (i = 0; i < slf_argc; ++i)
2476 PUSHs (sv_2mortal (slf_argv [i]));
2477
2478 PUSHs ((SV *)CvGV (slf_cv));
2479
2480 RETURNOP (slf_restore.op_first);
2481}
2482
2483static void
2484slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2485{
2486 SV **arg = (SV **)slf_frame.data;
2487
2488 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2489}
2490
2491static void
2492slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2493{
2494 if (items != 2)
2495 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2496
2497 frame->prepare = slf_prepare_transfer;
2498 frame->check = slf_check_nop;
2499 frame->data = (void *)arg; /* let's hope it will stay valid */
2500}
2501
2502static void
2503slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2504{
2505 frame->prepare = prepare_schedule;
2506 frame->check = slf_check_nop;
2507}
2508
2509static void
2510slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2511{
2512 struct coro *next = (struct coro *)slf_frame.data;
2513
2514 SvREFCNT_inc_NN (next->hv);
2515 prepare_schedule_to (aTHX_ ta, next);
2516}
2517
2518static void
2519slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 if (!items)
2522 croak ("Coro::schedule_to expects a coroutine argument, caught");
2523
2524 frame->data = (void *)SvSTATE (arg [0]);
2525 frame->prepare = slf_prepare_schedule_to;
2526 frame->check = slf_check_nop;
2527}
2528
2529static void
2530slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 api_ready (aTHX_ SvRV (coro_current));
2533
2534 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2535}
2536
2537static void
2538slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2539{
2540 frame->prepare = prepare_cede;
2541 frame->check = slf_check_nop;
2542}
2543
2544static void
2545slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 frame->prepare = prepare_cede_notself;
2548 frame->check = slf_check_nop;
2549}
2550
2551/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2552static void
2553slf_destroy (pTHX_ struct coro *coro)
2554{
2555 /* this callback is reserved for slf functions needing to do cleanup */
2556 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2557 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2558
2559 /*
2560 * The on_destroy above most likely is from an SLF call.
2561 * Since by definition the SLF call will not finish when we destroy
2562 * the coro, we will have to force-finish it here, otherwise
2563 * cleanup functions cannot call SLF functions.
2564 */
2565 coro->slf_frame.prepare = 0;
2566}
2567
2568/*
2569 * these not obviously related functions are all rolled into one
2570 * function to increase chances that they all will call transfer with the same
2571 * stack offset
2572 * SLF stands for "schedule-like-function".
2573 */
2574static OP *
2575pp_slf (pTHX)
2576{
2577 I32 checkmark; /* mark SP to see how many elements check has pushed */
2578
2579 /* set up the slf frame, unless it has already been set-up */
2580 /* the latter happens when a new coro has been started */
2581 /* or when a new cctx was attached to an existing coroutine */
2582 if (ecb_expect_true (!slf_frame.prepare))
2583 {
2584 /* first iteration */
2585 dSP;
2586 SV **arg = PL_stack_base + TOPMARK + 1;
2587 int items = SP - arg; /* args without function object */
2588 SV *gv = *sp;
2589
2590 /* do a quick consistency check on the "function" object, and if it isn't */
2591 /* for us, divert to the real entersub */
2592 if (SvTYPE (gv) != SVt_PVGV
2593 || !GvCV (gv)
2594 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2595 return PL_ppaddr[OP_ENTERSUB](aTHX);
2596
2597 if (!(PL_op->op_flags & OPf_STACKED))
2598 {
2599 /* ampersand-form of call, use @_ instead of stack */
2600 AV *av = GvAV (PL_defgv);
2601 arg = AvARRAY (av);
2602 items = AvFILLp (av) + 1;
2603 }
2604
2605 /* now call the init function, which needs to set up slf_frame */
2606 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2607 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2608
2609 /* pop args */
2610 SP = PL_stack_base + POPMARK;
2611
2612 PUTBACK;
2613 }
2614
2615 /* now that we have a slf_frame, interpret it! */
2616 /* we use a callback system not to make the code needlessly */
2617 /* complicated, but so we can run multiple perl coros from one cctx */
2618
2619 do
2620 {
2621 struct coro_transfer_args ta;
2622
2623 slf_frame.prepare (aTHX_ &ta);
2624 TRANSFER (ta, 0);
2625
2626 checkmark = PL_stack_sp - PL_stack_base;
2627 }
2628 while (slf_frame.check (aTHX_ &slf_frame));
2629
2630 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2631
2632 /* exception handling */
2633 if (ecb_expect_false (CORO_THROW))
2634 {
2635 SV *exception = sv_2mortal (CORO_THROW);
2636
2637 CORO_THROW = 0;
2638 sv_setsv (ERRSV, exception);
2639 croak (0);
2640 }
2641
2642 /* return value handling - mostly like entersub */
2643 /* make sure we put something on the stack in scalar context */
2644 if (GIMME_V == G_SCALAR
2645 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2646 {
2647 dSP;
2648 SV **bot = PL_stack_base + checkmark;
2649
2650 if (sp == bot) /* too few, push undef */
2651 bot [1] = &PL_sv_undef;
2652 else /* too many, take last one */
2653 bot [1] = *sp;
2654
2655 SP = bot + 1;
2656
2657 PUTBACK;
2658 }
2659
2660 return NORMAL;
2661}
2662
2663static void
2664api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2665{
2666 int i;
2667 SV **arg = PL_stack_base + ax;
2668 int items = PL_stack_sp - arg + 1;
2669
2670 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2671
2672 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2673 && PL_op->op_ppaddr != pp_slf)
2674 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2675
2676 CvFLAGS (cv) |= CVf_SLF;
2677 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2678 slf_cv = cv;
2679
2680 /* we patch the op, and then re-run the whole call */
2681 /* we have to put the same argument on the stack for this to work */
2682 /* and this will be done by pp_restore */
2683 slf_restore.op_next = (OP *)&slf_restore;
2684 slf_restore.op_type = OP_CUSTOM;
2685 slf_restore.op_ppaddr = pp_restore;
2686 slf_restore.op_first = PL_op;
2687
2688 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2689
2690 if (PL_op->op_flags & OPf_STACKED)
2691 {
2692 if (items > slf_arga)
2693 {
2694 slf_arga = items;
2695 Safefree (slf_argv);
2696 New (0, slf_argv, slf_arga, SV *);
2697 }
2698
2699 slf_argc = items;
2700
2701 for (i = 0; i < items; ++i)
2702 slf_argv [i] = SvREFCNT_inc (arg [i]);
2703 }
2704 else
2705 slf_argc = 0;
2706
2707 PL_op->op_ppaddr = pp_slf;
2708 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2709
2710 PL_op = (OP *)&slf_restore;
2711}
2712
2713/*****************************************************************************/
2714/* dynamic wind */
2715
2716static void
2717on_enterleave_call (pTHX_ SV *cb)
2718{
2719 dSP;
2720
2721 PUSHSTACK;
2722
2723 PUSHMARK (SP);
2724 PUTBACK;
2725 call_sv (cb, G_VOID | G_DISCARD);
2726 SPAGAIN;
2727
2728 POPSTACK;
2729}
2730
2731static SV *
2732coro_avp_pop_and_free (pTHX_ AV **avp)
2733{
2734 AV *av = *avp;
2735 SV *res = av_pop (av);
2736
2737 if (AvFILLp (av) < 0)
2738 {
2739 *avp = 0;
2740 SvREFCNT_dec (av);
2741 }
2742
2743 return res;
2744}
2745
2746static void
2747coro_pop_on_enter (pTHX_ void *coro)
2748{
2749 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2750 SvREFCNT_dec (cb);
2751}
2752
2753static void
2754coro_pop_on_leave (pTHX_ void *coro)
2755{
2756 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2757 on_enterleave_call (aTHX_ sv_2mortal (cb));
2758}
2759
2760/*****************************************************************************/
2761/* PerlIO::cede */
2762
2763typedef struct
2764{
2765 PerlIOBuf base;
2766 NV next, every;
2767} PerlIOCede;
2768
2769static IV ecb_cold
2770PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2771{
2772 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2773
2774 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2775 self->next = nvtime () + self->every;
2776
2777 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2778}
2779
2780static SV * ecb_cold
2781PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2782{
2783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2784
2785 return newSVnv (self->every);
2786}
2787
2788static IV
2789PerlIOCede_flush (pTHX_ PerlIO *f)
2790{
2791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2792 double now = nvtime ();
2793
2794 if (now >= self->next)
2795 {
2796 api_cede (aTHX);
2797 self->next = now + self->every;
2798 }
2799
2800 return PerlIOBuf_flush (aTHX_ f);
2801}
2802
2803static PerlIO_funcs PerlIO_cede =
2804{
2805 sizeof(PerlIO_funcs),
2806 "cede",
2807 sizeof(PerlIOCede),
2808 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2809 PerlIOCede_pushed,
2810 PerlIOBuf_popped,
2811 PerlIOBuf_open,
2812 PerlIOBase_binmode,
2813 PerlIOCede_getarg,
2814 PerlIOBase_fileno,
2815 PerlIOBuf_dup,
2816 PerlIOBuf_read,
2817 PerlIOBuf_unread,
2818 PerlIOBuf_write,
2819 PerlIOBuf_seek,
2820 PerlIOBuf_tell,
2821 PerlIOBuf_close,
2822 PerlIOCede_flush,
2823 PerlIOBuf_fill,
2824 PerlIOBase_eof,
2825 PerlIOBase_error,
2826 PerlIOBase_clearerr,
2827 PerlIOBase_setlinebuf,
2828 PerlIOBuf_get_base,
2829 PerlIOBuf_bufsiz,
2830 PerlIOBuf_get_ptr,
2831 PerlIOBuf_get_cnt,
2832 PerlIOBuf_set_ptrcnt,
2833};
2834
2835/*****************************************************************************/
2836/* Coro::Semaphore & Coro::Signal */
2837
2838static SV *
2839coro_waitarray_new (pTHX_ int count)
2840{
2841 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2842 AV *av = newAV ();
2843 SV **ary;
2844
2845 /* unfortunately, building manually saves memory */
2846 Newx (ary, 2, SV *);
2847 AvALLOC (av) = ary;
2848#if PERL_VERSION_ATLEAST (5,10,0)
2849 AvARRAY (av) = ary;
2850#else
2851 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2852 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2853 SvPVX ((SV *)av) = (char *)ary;
2854#endif
2855 AvMAX (av) = 1;
2856 AvFILLp (av) = 0;
2857 ary [0] = newSViv (count);
2858
2859 return newRV_noinc ((SV *)av);
2860}
2861
2862/* semaphore */
2863
2864static void
2865coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2866{
2867 SV *count_sv = AvARRAY (av)[0];
2868 IV count = SvIVX (count_sv);
2869
2870 count += adjust;
2871 SvIVX (count_sv) = count;
2872
2873 /* now wake up as many waiters as are expected to lock */
2874 while (count > 0 && AvFILLp (av) > 0)
2875 {
2876 SV *cb;
2877
2878 /* swap first two elements so we can shift a waiter */
2879 AvARRAY (av)[0] = AvARRAY (av)[1];
2880 AvARRAY (av)[1] = count_sv;
2881 cb = av_shift (av);
2882
2883 if (SvOBJECT (cb))
2884 {
2885 api_ready (aTHX_ cb);
2886 --count;
2887 }
2888 else if (SvTYPE (cb) == SVt_PVCV)
2889 {
2890 dSP;
2891 PUSHMARK (SP);
2892 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2893 PUTBACK;
2894 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2895 }
2896
2897 SvREFCNT_dec (cb);
2898 }
2899}
2900
2901static void
2902coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2903{
2904 /* call $sem->adjust (0) to possibly wake up some other waiters */
2905 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2906}
2907
2908static int
2909slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2910{
2911 AV *av = (AV *)frame->data;
2912 SV *count_sv = AvARRAY (av)[0];
2913 SV *coro_hv = SvRV (coro_current);
2914
2915 /* if we are about to throw, don't actually acquire the lock, just throw */
2916 if (CORO_THROW)
2917 return 0;
2918 else if (SvIVX (count_sv) > 0)
2919 {
2920 frame->destroy = 0;
2921
2922 if (acquire)
2923 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2924 else
2925 coro_semaphore_adjust (aTHX_ av, 0);
2926
2927 return 0;
2928 }
2929 else
2930 {
2931 int i;
2932 /* if we were woken up but can't down, we look through the whole */
2933 /* waiters list and only add us if we aren't in there already */
2934 /* this avoids some degenerate memory usage cases */
2935 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2936 if (AvARRAY (av)[i] == coro_hv)
2937 return 1;
2938
2939 av_push (av, SvREFCNT_inc (coro_hv));
2940 return 1;
2941 }
2942}
2943
2944static int
2945slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2946{
2947 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2948}
2949
2950static int
2951slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2952{
2953 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2954}
2955
2956static void
2957slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2958{
2959 AV *av = (AV *)SvRV (arg [0]);
2960
2961 if (SvIVX (AvARRAY (av)[0]) > 0)
2962 {
2963 frame->data = (void *)av;
2964 frame->prepare = prepare_nop;
2965 }
2966 else
2967 {
2968 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2969
2970 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2971 frame->prepare = prepare_schedule;
2972 /* to avoid race conditions when a woken-up coro gets terminated */
2973 /* we arrange for a temporary on_destroy that calls adjust (0) */
2974 frame->destroy = coro_semaphore_destroy;
2975 }
2976}
2977
2978static void
2979slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2980{
2981 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2982 frame->check = slf_check_semaphore_down;
2983}
2984
2985static void
2986slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2987{
2988 if (items >= 2)
2989 {
2990 /* callback form */
2991 AV *av = (AV *)SvRV (arg [0]);
2992 SV *cb_cv = s_get_cv_croak (arg [1]);
2993
2994 av_push (av, SvREFCNT_inc_NN (cb_cv));
2995
2996 if (SvIVX (AvARRAY (av)[0]) > 0)
2997 coro_semaphore_adjust (aTHX_ av, 0);
2998
2999 frame->prepare = prepare_nop;
3000 frame->check = slf_check_nop;
3001 }
3002 else
3003 {
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_wait;
3006 }
3007}
3008
3009/* signal */
3010
3011static void
3012coro_signal_wake (pTHX_ AV *av, int count)
3013{
3014 SvIVX (AvARRAY (av)[0]) = 0;
3015
3016 /* now signal count waiters */
3017 while (count > 0 && AvFILLp (av) > 0)
3018 {
3019 SV *cb;
3020
3021 /* swap first two elements so we can shift a waiter */
3022 cb = AvARRAY (av)[0];
3023 AvARRAY (av)[0] = AvARRAY (av)[1];
3024 AvARRAY (av)[1] = cb;
3025
3026 cb = av_shift (av);
3027
3028 if (SvTYPE (cb) == SVt_PVCV)
3029 {
3030 dSP;
3031 PUSHMARK (SP);
3032 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3033 PUTBACK;
3034 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3035 }
3036 else
3037 {
3038 api_ready (aTHX_ cb);
3039 sv_setiv (cb, 0); /* signal waiter */
3040 }
3041
3042 SvREFCNT_dec (cb);
3043
3044 --count;
3045 }
3046}
3047
3048static int
3049slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3050{
3051 /* if we are about to throw, also stop waiting */
3052 return SvROK ((SV *)frame->data) && !CORO_THROW;
3053}
3054
3055static void
3056slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3057{
3058 AV *av = (AV *)SvRV (arg [0]);
3059
3060 if (items >= 2)
3061 {
3062 SV *cb_cv = s_get_cv_croak (arg [1]);
3063 av_push (av, SvREFCNT_inc_NN (cb_cv));
3064
3065 if (SvIVX (AvARRAY (av)[0]))
3066 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3067
3068 frame->prepare = prepare_nop;
3069 frame->check = slf_check_nop;
3070 }
3071 else if (SvIVX (AvARRAY (av)[0]))
3072 {
3073 SvIVX (AvARRAY (av)[0]) = 0;
3074 frame->prepare = prepare_nop;
3075 frame->check = slf_check_nop;
3076 }
3077 else
3078 {
3079 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3080
3081 av_push (av, waiter);
3082
3083 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3084 frame->prepare = prepare_schedule;
3085 frame->check = slf_check_signal_wait;
3086 }
3087}
3088
3089/*****************************************************************************/
3090/* Coro::AIO */
3091
3092#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3093
3094/* helper storage struct */
3095struct io_state
3096{
3097 int errorno;
3098 I32 laststype; /* U16 in 5.10.0 */
3099 int laststatval;
3100 Stat_t statcache;
3101};
3102
3103static void
3104coro_aio_callback (pTHX_ CV *cv)
3105{
3106 dXSARGS;
3107 AV *state = (AV *)S_GENSUB_ARG;
3108 SV *coro = av_pop (state);
3109 SV *data_sv = newSV (sizeof (struct io_state));
3110
3111 av_extend (state, items - 1);
3112
3113 sv_upgrade (data_sv, SVt_PV);
3114 SvCUR_set (data_sv, sizeof (struct io_state));
3115 SvPOK_only (data_sv);
3116
3117 {
3118 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3119
3120 data->errorno = errno;
3121 data->laststype = PL_laststype;
3122 data->laststatval = PL_laststatval;
3123 data->statcache = PL_statcache;
3124 }
3125
3126 /* now build the result vector out of all the parameters and the data_sv */
3127 {
3128 int i;
3129
3130 for (i = 0; i < items; ++i)
3131 av_push (state, SvREFCNT_inc_NN (ST (i)));
3132 }
3133
3134 av_push (state, data_sv);
3135
3136 api_ready (aTHX_ coro);
3137 SvREFCNT_dec (coro);
3138 SvREFCNT_dec ((AV *)state);
3139}
3140
3141static int
3142slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3143{
3144 AV *state = (AV *)frame->data;
3145
3146 /* if we are about to throw, return early */
3147 /* this does not cancel the aio request, but at least */
3148 /* it quickly returns */
3149 if (CORO_THROW)
3150 return 0;
3151
3152 /* one element that is an RV? repeat! */
3153 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3154 return 1;
3155
3156 /* restore status */
3157 {
3158 SV *data_sv = av_pop (state);
3159 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3160
3161 errno = data->errorno;
3162 PL_laststype = data->laststype;
3163 PL_laststatval = data->laststatval;
3164 PL_statcache = data->statcache;
3165
3166 SvREFCNT_dec (data_sv);
3167 }
3168
3169 /* push result values */
3170 {
3171 dSP;
3172 int i;
3173
3174 EXTEND (SP, AvFILLp (state) + 1);
3175 for (i = 0; i <= AvFILLp (state); ++i)
3176 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3177
3178 PUTBACK;
3179 }
3180
3181 return 0;
3182}
3183
3184static void
3185slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3186{
3187 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3188 SV *coro_hv = SvRV (coro_current);
3189 struct coro *coro = SvSTATE_hv (coro_hv);
3190
3191 /* put our coroutine id on the state arg */
3192 av_push (state, SvREFCNT_inc_NN (coro_hv));
3193
3194 /* first see whether we have a non-zero priority and set it as AIO prio */
3195 if (coro->prio)
3196 {
3197 dSP;
3198
3199 static SV *prio_cv;
3200 static SV *prio_sv;
3201
3202 if (ecb_expect_false (!prio_cv))
3203 {
3204 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3205 prio_sv = newSViv (0);
3206 }
3207
3208 PUSHMARK (SP);
3209 sv_setiv (prio_sv, coro->prio);
3210 XPUSHs (prio_sv);
3211
3212 PUTBACK;
3213 call_sv (prio_cv, G_VOID | G_DISCARD);
3214 }
3215
3216 /* now call the original request */
3217 {
3218 dSP;
3219 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3220 int i;
3221
3222 PUSHMARK (SP);
3223
3224 /* first push all args to the stack */
3225 EXTEND (SP, items + 1);
3226
3227 for (i = 0; i < items; ++i)
3228 PUSHs (arg [i]);
3229
3230 /* now push the callback closure */
3231 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3232
3233 /* now call the AIO function - we assume our request is uncancelable */
3234 PUTBACK;
3235 call_sv ((SV *)req, G_VOID | G_DISCARD);
3236 }
3237
3238 /* now that the request is going, we loop till we have a result */
3239 frame->data = (void *)state;
3240 frame->prepare = prepare_schedule;
3241 frame->check = slf_check_aio_req;
3242}
3243
3244static void
3245coro_aio_req_xs (pTHX_ CV *cv)
3246{
3247 dXSARGS;
3248
3249 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3250
3251 XSRETURN_EMPTY;
3252}
3253
3254/*****************************************************************************/
3255
3256#if CORO_CLONE
3257# include "clone.c"
3258#endif
3259
3260/*****************************************************************************/
3261
3262static SV *
3263coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3264{
3265 SV *coro_sv;
3266 struct coro *coro;
3267 MAGIC *mg;
3268 HV *hv;
3269 SV *cb;
3270 int i;
3271
3272 if (argc > 0)
3273 {
3274 cb = s_get_cv_croak (argv [0]);
3275
3276 if (!is_coro)
3277 {
3278 if (CvISXSUB (cb))
3279 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3280
3281 if (!CvROOT (cb))
3282 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3283 }
3284 }
3285
3286 Newz (0, coro, 1, struct coro);
3287 coro->args = newAV ();
3288 coro->flags = CF_NEW;
3289
3290 if (coro_first) coro_first->prev = coro;
3291 coro->next = coro_first;
3292 coro_first = coro;
3293
3294 coro->hv = hv = newHV ();
3295 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3296 mg->mg_flags |= MGf_DUP;
3297 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3298
3299 if (argc > 0)
3300 {
3301 av_extend (coro->args, argc + is_coro - 1);
3302
3303 if (is_coro)
3304 {
3305 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3306 cb = (SV *)cv_coro_run;
3307 }
3308
3309 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3310
3311 for (i = 1; i < argc; i++)
3312 av_push (coro->args, newSVsv (argv [i]));
3313 }
3314
3315 return coro_sv;
3316}
3317
3318#ifndef __cplusplus
3319ecb_cold XS(boot_Coro__State);
3320#endif
3321
3322#if CORO_JIT
3323
3324static void ecb_noinline ecb_cold
3325pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3326{
3327 dSP;
3328 AV *av = newAV ();
3329
3330 av_store (av, 3, newSVuv (d));
3331 av_store (av, 2, newSVuv (c));
3332 av_store (av, 1, newSVuv (b));
3333 av_store (av, 0, newSVuv (a));
3334
3335 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3336
3337 PUTBACK;
3338}
3339
3340static void ecb_noinline ecb_cold
3341jit_init (pTHX)
3342{
3343 dSP;
3344 SV *load, *save;
3345 char *map_base;
3346 char *load_ptr, *save_ptr;
3347 STRLEN load_len, save_len, map_len;
3348 int count;
3349
3350 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3351
3352 PUSHMARK (SP);
3353 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3354 #include "state.h"
3355 count = call_pv ("Coro::State::_jit", G_ARRAY);
3356 SPAGAIN;
3357
3358 save = POPs; save_ptr = SvPVbyte (save, save_len);
3359 load = POPs; load_ptr = SvPVbyte (load, load_len);
3360
3361 map_len = load_len + save_len + 16;
3362
3363 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3364
3365 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3366
3367 load_perl_slots = (load_save_perl_slots_type)map_base;
3368 memcpy (map_base, load_ptr, load_len);
3369
3370 map_base += (load_len + 15) & ~15;
3371
3372 save_perl_slots = (load_save_perl_slots_type)map_base;
3373 memcpy (map_base, save_ptr, save_len);
3374
3375 /* we are good citizens and try to make the page read-only, so the evil evil */
3376 /* hackers might have it a bit more difficult */
3377 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3378
3379 PUTBACK;
3380 eval_pv ("undef &Coro::State::_jit", 1);
3381}
3382
3383#endif
1382 3384
1383MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3385MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1384 3386
1385PROTOTYPES: DISABLE 3387PROTOTYPES: DISABLE
1386 3388
1387BOOT: 3389BOOT:
1388{ 3390{
1389#ifdef USE_ITHREADS 3391#ifdef USE_ITHREADS
1390 MUTEX_INIT (&coro_mutex); 3392# if CORO_PTHREAD
3393 coro_thx = PERL_GET_CONTEXT;
3394# endif
1391#endif 3395#endif
1392 BOOT_PAGESIZE; 3396 /* perl defines these to check for existance first, but why it doesn't */
3397 /* just create them one at init time is not clear to me, except for */
3398 /* programs trying to delete them, but... */
3399 /* anyway, we declare this as invalid and make sure they are initialised here */
3400 DEFSV;
3401 ERRSV;
3402
3403 cctx_current = cctx_new_empty ();
3404
3405 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3406 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3407
3408 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3409 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3410 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3411
3412 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3413 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3414 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 3415
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3416 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 3417
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3418 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3419 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1398 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); 3420 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1399 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); 3421 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1400 3422
1401 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1402 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1403 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1404 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1405 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1406 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1407 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1408
1409 main_mainstack = PL_mainstack; 3423 main_mainstack = PL_mainstack;
1410 main_top_env = PL_top_env; 3424 main_top_env = PL_top_env;
1411 3425
1412 while (main_top_env->je_prev) 3426 while (main_top_env->je_prev)
1413 main_top_env = main_top_env->je_prev; 3427 main_top_env = main_top_env->je_prev;
1414 3428
3429 {
3430 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3431
3432 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3433 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3434
3435 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3436 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3437 }
3438
1415 coroapi.ver = CORO_API_VERSION; 3439 coroapi.ver = CORO_API_VERSION;
3440 coroapi.rev = CORO_API_REVISION;
3441
1416 coroapi.transfer = api_transfer; 3442 coroapi.transfer = api_transfer;
1417 3443
3444 coroapi.sv_state = SvSTATE_;
3445 coroapi.execute_slf = api_execute_slf;
3446 coroapi.prepare_nop = prepare_nop;
3447 coroapi.prepare_schedule = prepare_schedule;
3448 coroapi.prepare_cede = prepare_cede;
3449 coroapi.prepare_cede_notself = prepare_cede_notself;
3450
3451 time_init (aTHX);
3452
1418 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3453 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3454#if CORO_JIT
3455 PUTBACK;
3456 jit_init (aTHX);
3457 SPAGAIN;
3458#endif
1419} 3459}
1420 3460
1421SV * 3461SV *
1422new (char *klass, ...) 3462new (SV *klass, ...)
3463 ALIAS:
3464 Coro::new = 1
1423 CODE: 3465 CODE:
1424{ 3466 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1425 struct coro *coro;
1426 HV *hv;
1427 int i;
1428
1429 Newz (0, coro, 1, struct coro);
1430 coro->args = newAV ();
1431 coro->save = CORO_SAVE_DEF;
1432 coro->flags = CF_NEW;
1433
1434 if (coro_first) coro_first->prev = coro;
1435 coro->next = coro_first;
1436 coro_first = coro;
1437
1438 coro->hv = hv = newHV ();
1439 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1440 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1441
1442 for (i = 1; i < items; i++)
1443 av_push (coro->args, newSVsv (ST (i)));
1444}
1445 OUTPUT:
1446 RETVAL
1447
1448int
1449save (SV *coro, int new_save = -1)
1450 CODE:
1451 RETVAL = api_save (coro, new_save);
1452 OUTPUT: 3467 OUTPUT:
1453 RETVAL 3468 RETVAL
1454 3469
1455int 3470void
1456save_also (SV *coro_sv, int save_also) 3471transfer (...)
3472 PROTOTYPE: $$
1457 CODE: 3473 CODE:
1458{ 3474 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1459 struct coro *coro = SvSTATE (coro_sv);
1460 RETVAL = coro->save;
1461 coro->save |= save_also;
1462}
1463 OUTPUT:
1464 RETVAL
1465 3475
1466# these not obviously related functions are all rolled into the same xs
1467# function to increase chances that they all will call transfer with the same
1468# stack offset
1469void 3476void
1470_set_stacklevel (...)
1471 ALIAS:
1472 Coro::State::transfer = 1
1473 Coro::schedule = 2
1474 Coro::cede = 3
1475 Coro::cede_notself = 4
1476 CODE:
1477{
1478 struct transfer_args ta;
1479
1480 switch (ix)
1481 {
1482 case 0:
1483 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1484 ta.next = 0;
1485 break;
1486
1487 case 1:
1488 if (items != 2)
1489 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1490
1491 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1492 break;
1493
1494 case 2:
1495 prepare_schedule (aTHX_ &ta);
1496 break;
1497
1498 case 3:
1499 prepare_cede (aTHX_ &ta);
1500 break;
1501
1502 case 4:
1503 if (!prepare_cede_notself (aTHX_ &ta))
1504 XSRETURN_EMPTY;
1505
1506 break;
1507 }
1508
1509 BARRIER;
1510 TRANSFER (ta);
1511
1512 if (GIMME_V != G_VOID && ta.next != ta.prev)
1513 XSRETURN_YES;
1514}
1515
1516bool
1517_destroy (SV *coro_sv)
1518 CODE:
1519 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1520 OUTPUT:
1521 RETVAL
1522
1523void
1524_exit (code) 3477_exit (int code)
1525 int code
1526 PROTOTYPE: $ 3478 PROTOTYPE: $
1527 CODE: 3479 CODE:
1528 _exit (code); 3480 _exit (code);
1529 3481
3482SV *
3483clone (Coro::State coro)
3484 CODE:
3485{
3486#if CORO_CLONE
3487 struct coro *ncoro = coro_clone (aTHX_ coro);
3488 MAGIC *mg;
3489 /* TODO: too much duplication */
3490 ncoro->hv = newHV ();
3491 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3492 mg->mg_flags |= MGf_DUP;
3493 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3494#else
3495 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3496#endif
3497}
3498 OUTPUT:
3499 RETVAL
3500
1530int 3501int
1531cctx_stacksize (int new_stacksize = 0) 3502cctx_stacksize (int new_stacksize = 0)
3503 PROTOTYPE: ;$
1532 CODE: 3504 CODE:
1533 RETVAL = coro_stacksize; 3505 RETVAL = cctx_stacksize;
1534 if (new_stacksize) 3506 if (new_stacksize)
3507 {
1535 coro_stacksize = new_stacksize; 3508 cctx_stacksize = new_stacksize;
3509 ++cctx_gen;
3510 }
1536 OUTPUT: 3511 OUTPUT:
1537 RETVAL 3512 RETVAL
1538 3513
1539int 3514int
3515cctx_max_idle (int max_idle = 0)
3516 PROTOTYPE: ;$
3517 CODE:
3518 RETVAL = cctx_max_idle;
3519 if (max_idle > 1)
3520 cctx_max_idle = max_idle;
3521 OUTPUT:
3522 RETVAL
3523
3524int
1540cctx_count () 3525cctx_count ()
3526 PROTOTYPE:
1541 CODE: 3527 CODE:
1542 RETVAL = cctx_count; 3528 RETVAL = cctx_count;
1543 OUTPUT: 3529 OUTPUT:
1544 RETVAL 3530 RETVAL
1545 3531
1546int 3532int
1547cctx_idle () 3533cctx_idle ()
3534 PROTOTYPE:
1548 CODE: 3535 CODE:
1549 RETVAL = cctx_idle; 3536 RETVAL = cctx_idle;
1550 OUTPUT: 3537 OUTPUT:
1551 RETVAL 3538 RETVAL
1552 3539
1553void 3540void
1554list () 3541list ()
3542 PROTOTYPE:
1555 PPCODE: 3543 PPCODE:
1556{ 3544{
1557 struct coro *coro; 3545 struct coro *coro;
1558 for (coro = coro_first; coro; coro = coro->next) 3546 for (coro = coro_first; coro; coro = coro->next)
1559 if (coro->hv) 3547 if (coro->hv)
1560 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3548 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1561} 3549}
1562 3550
… …
1564call (Coro::State coro, SV *coderef) 3552call (Coro::State coro, SV *coderef)
1565 ALIAS: 3553 ALIAS:
1566 eval = 1 3554 eval = 1
1567 CODE: 3555 CODE:
1568{ 3556{
1569 if (coro->mainstack) 3557 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1570 { 3558 {
1571 struct coro temp; 3559 struct coro *current = SvSTATE_current;
1572 Zero (&temp, 1, struct coro); 3560 struct CoroSLF slf_save;
1573 temp.save = CORO_SAVE_ALL;
1574 3561
1575 if (!(coro->flags & CF_RUNNING)) 3562 if (current != coro)
1576 { 3563 {
3564 PUTBACK;
1577 save_perl (aTHX_ &temp); 3565 save_perl (aTHX_ current);
1578 load_perl (aTHX_ coro); 3566 load_perl (aTHX_ coro);
3567 /* the coro is most likely in an active SLF call.
3568 * while not strictly required (the code we execute is
3569 * not allowed to call any SLF functions), it's cleaner
3570 * to reinitialise the slf_frame and restore it later.
3571 * This might one day allow us to actually do SLF calls
3572 * from code executed here.
3573 */
3574 slf_save = slf_frame;
3575 slf_frame.prepare = 0;
3576 SPAGAIN;
1579 } 3577 }
1580 3578
1581 { 3579 PUSHSTACK;
1582 dSP; 3580
1583 ENTER;
1584 SAVETMPS;
1585 PUSHMARK (SP); 3581 PUSHMARK (SP);
1586 PUTBACK; 3582 PUTBACK;
3583
1587 if (ix) 3584 if (ix)
1588 eval_sv (coderef, 0); 3585 eval_sv (coderef, 0);
1589 else 3586 else
1590 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3587 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3588
3589 POPSTACK;
1591 SPAGAIN; 3590 SPAGAIN;
1592 FREETMPS;
1593 LEAVE;
1594 PUTBACK;
1595 }
1596 3591
1597 if (!(coro->flags & CF_RUNNING)) 3592 if (current != coro)
1598 { 3593 {
3594 PUTBACK;
3595 slf_frame = slf_save;
1599 save_perl (aTHX_ coro); 3596 save_perl (aTHX_ coro);
1600 load_perl (aTHX_ &temp); 3597 load_perl (aTHX_ current);
3598 SPAGAIN;
1601 } 3599 }
1602 } 3600 }
1603} 3601}
1604 3602
1605SV * 3603SV *
… …
1607 PROTOTYPE: $ 3605 PROTOTYPE: $
1608 ALIAS: 3606 ALIAS:
1609 is_ready = CF_READY 3607 is_ready = CF_READY
1610 is_running = CF_RUNNING 3608 is_running = CF_RUNNING
1611 is_new = CF_NEW 3609 is_new = CF_NEW
1612 is_destroyed = CF_DESTROYED 3610 is_destroyed = CF_ZOMBIE
3611 is_zombie = CF_ZOMBIE
3612 is_suspended = CF_SUSPENDED
1613 CODE: 3613 CODE:
1614 RETVAL = boolSV (coro->flags & ix); 3614 RETVAL = boolSV (coro->flags & ix);
1615 OUTPUT: 3615 OUTPUT:
1616 RETVAL 3616 RETVAL
1617 3617
1618void 3618void
3619throw (SV *self, SV *exception = &PL_sv_undef)
3620 PROTOTYPE: $;$
3621 CODE:
3622{
3623 struct coro *coro = SvSTATE (self);
3624 struct coro *current = SvSTATE_current;
3625 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3626 SvREFCNT_dec (*exceptionp);
3627 SvGETMAGIC (exception);
3628 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3629
3630 api_ready (aTHX_ self);
3631}
3632
3633void
1619api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3634api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3635 PROTOTYPE: $;$
3636 C_ARGS: aTHX_ coro, flags
1620 3637
1621SV * 3638SV *
1622has_stack (Coro::State coro) 3639has_cctx (Coro::State coro)
1623 PROTOTYPE: $ 3640 PROTOTYPE: $
1624 CODE: 3641 CODE:
1625 RETVAL = boolSV (!!coro->cctx); 3642 /* maybe manage the running flag differently */
3643 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1626 OUTPUT: 3644 OUTPUT:
1627 RETVAL 3645 RETVAL
1628 3646
1629int 3647int
1630is_traced (Coro::State coro) 3648is_traced (Coro::State coro)
… …
1632 CODE: 3650 CODE:
1633 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3651 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1634 OUTPUT: 3652 OUTPUT:
1635 RETVAL 3653 RETVAL
1636 3654
1637IV 3655UV
1638rss (Coro::State coro) 3656rss (Coro::State coro)
1639 PROTOTYPE: $ 3657 PROTOTYPE: $
1640 ALIAS: 3658 ALIAS:
1641 usecount = 1 3659 usecount = 1
1642 CODE: 3660 CODE:
… …
1646 case 1: RETVAL = coro->usecount; break; 3664 case 1: RETVAL = coro->usecount; break;
1647 } 3665 }
1648 OUTPUT: 3666 OUTPUT:
1649 RETVAL 3667 RETVAL
1650 3668
3669void
3670force_cctx ()
3671 PROTOTYPE:
3672 CODE:
3673 cctx_current->idle_sp = 0;
3674
3675void
3676swap_defsv (Coro::State self)
3677 PROTOTYPE: $
3678 ALIAS:
3679 swap_defav = 1
3680 CODE:
3681 if (!self->slot)
3682 croak ("cannot swap state with coroutine that has no saved state,");
3683 else
3684 {
3685 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3686 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3687
3688 SV *tmp = *src; *src = *dst; *dst = tmp;
3689 }
3690
3691void
3692cancel (Coro::State self)
3693 CODE:
3694 coro_state_destroy (aTHX_ self);
3695
3696SV *
3697enable_times (int enabled = enable_times)
3698 CODE:
3699{
3700 RETVAL = boolSV (enable_times);
3701
3702 if (enabled != enable_times)
3703 {
3704 enable_times = enabled;
3705
3706 coro_times_update ();
3707 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3708 }
3709}
3710 OUTPUT:
3711 RETVAL
3712
3713void
3714times (Coro::State self)
3715 PPCODE:
3716{
3717 struct coro *current = SvSTATE (coro_current);
3718
3719 if (ecb_expect_false (current == self))
3720 {
3721 coro_times_update ();
3722 coro_times_add (SvSTATE (coro_current));
3723 }
3724
3725 EXTEND (SP, 2);
3726 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3727 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3728
3729 if (ecb_expect_false (current == self))
3730 coro_times_sub (SvSTATE (coro_current));
3731}
3732
3733void
3734swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3735 CODE:
3736{
3737 struct coro *current = SvSTATE_current;
3738
3739 if (current == coro)
3740 SWAP_SVS (current);
3741
3742 if (!coro->swap_sv)
3743 coro->swap_sv = newAV ();
3744
3745 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3746 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3747
3748 if (current == coro)
3749 SWAP_SVS (current);
3750}
3751
1651 3752
1652MODULE = Coro::State PACKAGE = Coro 3753MODULE = Coro::State PACKAGE = Coro
1653 3754
1654BOOT: 3755BOOT:
1655{ 3756{
1656 int i;
1657
1658 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3757 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1659 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3758 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3759 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3760 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1660 av_async_pool = get_av ("Coro::async_pool", TRUE); 3761 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3762 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3763 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3764 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1661 3765
1662 coro_current = get_sv ("Coro::current", FALSE); 3766 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1663 SvREADONLY_on (coro_current); 3767 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3768 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3769 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1664 3770
1665 coro_stash = gv_stashpv ("Coro", TRUE); 3771 coro_stash = gv_stashpv ("Coro", TRUE);
1666 3772
1667 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3773 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1668 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3774 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1669 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3775 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1670 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3776 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1671 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3777 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1672 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3778 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1673
1674 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1675 coro_ready[i] = newAV ();
1676 3779
1677 { 3780 {
1678 SV *sv = perl_get_sv("Coro::API", 1); 3781 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1679 3782
1680 coroapi.schedule = api_schedule; 3783 coroapi.schedule = api_schedule;
1681 coroapi.save = api_save; 3784 coroapi.schedule_to = api_schedule_to;
1682 coroapi.cede = api_cede; 3785 coroapi.cede = api_cede;
1683 coroapi.cede_notself = api_cede_notself; 3786 coroapi.cede_notself = api_cede_notself;
1684 coroapi.ready = api_ready; 3787 coroapi.ready = api_ready;
1685 coroapi.is_ready = api_is_ready; 3788 coroapi.is_ready = api_is_ready;
1686 coroapi.nready = &coro_nready; 3789 coroapi.nready = coro_nready;
1687 coroapi.current = coro_current; 3790 coroapi.current = coro_current;
1688 3791
1689 GCoroAPI = &coroapi; 3792 /*GCoroAPI = &coroapi;*/
1690 sv_setiv (sv, (IV)&coroapi); 3793 sv_setiv (sv, (IV)&coroapi);
1691 SvREADONLY_on (sv); 3794 SvREADONLY_on (sv);
1692 } 3795 }
1693} 3796}
3797
3798SV *
3799async (...)
3800 PROTOTYPE: &@
3801 CODE:
3802 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3803 api_ready (aTHX_ RETVAL);
3804 OUTPUT:
3805 RETVAL
3806
3807void
3808_destroy (Coro::State coro)
3809 CODE:
3810 /* used by the manager thread */
3811 coro_state_destroy (aTHX_ coro);
3812
3813void
3814on_destroy (Coro::State coro, SV *cb)
3815 CODE:
3816 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3817
3818void
3819join (...)
3820 CODE:
3821 CORO_EXECUTE_SLF_XS (slf_init_join);
3822
3823void
3824terminate (...)
3825 CODE:
3826 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3827
3828void
3829cancel (...)
3830 CODE:
3831 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3832
3833int
3834safe_cancel (Coro::State self, ...)
3835 C_ARGS: aTHX_ self, &ST (1), items - 1
3836
3837void
3838schedule (...)
3839 CODE:
3840 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3841
3842void
3843schedule_to (...)
3844 CODE:
3845 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3846
3847void
3848cede_to (...)
3849 CODE:
3850 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3851
3852void
3853cede (...)
3854 CODE:
3855 CORO_EXECUTE_SLF_XS (slf_init_cede);
3856
3857void
3858cede_notself (...)
3859 CODE:
3860 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1694 3861
1695void 3862void
1696_set_current (SV *current) 3863_set_current (SV *current)
1697 PROTOTYPE: $ 3864 PROTOTYPE: $
1698 CODE: 3865 CODE:
1699 SvREFCNT_dec (SvRV (coro_current)); 3866 SvREFCNT_dec (SvRV (coro_current));
1700 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3867 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3868
3869void
3870_set_readyhook (SV *hook)
3871 PROTOTYPE: $
3872 CODE:
3873 SvREFCNT_dec (coro_readyhook);
3874 SvGETMAGIC (hook);
3875 if (SvOK (hook))
3876 {
3877 coro_readyhook = newSVsv (hook);
3878 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3879 }
3880 else
3881 {
3882 coro_readyhook = 0;
3883 CORO_READYHOOK = 0;
3884 }
1701 3885
1702int 3886int
1703prio (Coro::State coro, int newprio = 0) 3887prio (Coro::State coro, int newprio = 0)
3888 PROTOTYPE: $;$
1704 ALIAS: 3889 ALIAS:
1705 nice = 1 3890 nice = 1
1706 CODE: 3891 CODE:
1707{ 3892{
1708 RETVAL = coro->prio; 3893 RETVAL = coro->prio;
… …
1710 if (items > 1) 3895 if (items > 1)
1711 { 3896 {
1712 if (ix) 3897 if (ix)
1713 newprio = coro->prio - newprio; 3898 newprio = coro->prio - newprio;
1714 3899
1715 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3900 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1716 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3901 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1717 3902
1718 coro->prio = newprio; 3903 coro->prio = newprio;
1719 } 3904 }
1720} 3905}
1721 OUTPUT: 3906 OUTPUT:
… …
1723 3908
1724SV * 3909SV *
1725ready (SV *self) 3910ready (SV *self)
1726 PROTOTYPE: $ 3911 PROTOTYPE: $
1727 CODE: 3912 CODE:
1728 RETVAL = boolSV (api_ready (self)); 3913 RETVAL = boolSV (api_ready (aTHX_ self));
1729 OUTPUT: 3914 OUTPUT:
1730 RETVAL 3915 RETVAL
1731 3916
1732int 3917int
1733nready (...) 3918nready (...)
… …
1735 CODE: 3920 CODE:
1736 RETVAL = coro_nready; 3921 RETVAL = coro_nready;
1737 OUTPUT: 3922 OUTPUT:
1738 RETVAL 3923 RETVAL
1739 3924
1740# for async_pool speedup
1741void 3925void
1742_pool_1 (SV *cb) 3926suspend (Coro::State self)
3927 PROTOTYPE: $
1743 CODE: 3928 CODE:
1744{ 3929 self->flags |= CF_SUSPENDED;
1745 int i, len;
1746 HV *hv = (HV *)SvRV (coro_current);
1747 AV *defav = GvAV (PL_defgv);
1748 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1749 AV *invoke_av;
1750 3930
1751 if (!invoke) 3931void
1752 croak ("\3terminate\2\n"); 3932resume (Coro::State self)
3933 PROTOTYPE: $
3934 CODE:
3935 self->flags &= ~CF_SUSPENDED;
1753 3936
1754 hv_store (hv, "desc", sizeof ("desc") - 1, 3937void
1755 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3938_pool_handler (...)
3939 CODE:
3940 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1756 3941
1757 invoke_av = (AV *)SvRV (invoke); 3942void
1758 len = av_len (invoke_av); 3943async_pool (SV *cv, ...)
3944 PROTOTYPE: &@
3945 PPCODE:
3946{
3947 HV *hv = (HV *)av_pop (av_async_pool);
3948 AV *av = newAV ();
3949 SV *cb = ST (0);
3950 int i;
1759 3951
1760 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3952 av_extend (av, items - 2);
3953 for (i = 1; i < items; ++i)
3954 av_push (av, SvREFCNT_inc_NN (ST (i)));
1761 3955
1762 if (len > 0) 3956 if ((SV *)hv == &PL_sv_undef)
1763 { 3957 {
1764 av_fill (defav, len - 1); 3958 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1765 for (i = 0; i < len; ++i) 3959 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1766 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3960 SvREFCNT_dec (sv);
1767 } 3961 }
1768 3962
3963 {
3964 struct coro *coro = SvSTATE_hv (hv);
3965
3966 assert (!coro->invoke_cb);
3967 assert (!coro->invoke_av);
3968 coro->invoke_cb = SvREFCNT_inc (cb);
3969 coro->invoke_av = av;
3970 }
3971
3972 api_ready (aTHX_ (SV *)hv);
3973
3974 if (GIMME_V != G_VOID)
3975 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3976 else
1769 SvREFCNT_dec (invoke); 3977 SvREFCNT_dec (hv);
1770} 3978}
1771 3979
1772void 3980SV *
1773_pool_2 (SV *cb) 3981rouse_cb ()
3982 PROTOTYPE:
1774 CODE: 3983 CODE:
1775{ 3984 RETVAL = coro_new_rouse_cb (aTHX);
1776 struct coro *coro = SvSTATE (coro_current);
1777
1778 sv_setsv (cb, &PL_sv_undef);
1779
1780 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1781 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1782 croak ("\3terminate\2\n");
1783
1784 av_clear (GvAV (PL_defgv));
1785 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1786 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1787
1788 coro->save = CORO_SAVE_DEF;
1789 coro->prio = 0;
1790
1791 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1792 api_trace (coro_current, 0);
1793
1794 av_push (av_async_pool, newSVsv (coro_current));
1795}
1796
1797
1798MODULE = Coro::State PACKAGE = Coro::AIO
1799
1800SV *
1801_get_state ()
1802 CODE:
1803{
1804 struct io_state *data;
1805
1806 RETVAL = newSV (sizeof (struct io_state));
1807 data = (struct io_state *)SvPVX (RETVAL);
1808 SvCUR_set (RETVAL, sizeof (struct io_state));
1809 SvPOK_only (RETVAL);
1810
1811 data->errorno = errno;
1812 data->laststype = PL_laststype;
1813 data->laststatval = PL_laststatval;
1814 data->statcache = PL_statcache;
1815}
1816 OUTPUT: 3985 OUTPUT:
1817 RETVAL 3986 RETVAL
1818 3987
1819void 3988void
1820_set_state (char *data_) 3989rouse_wait (...)
3990 PROTOTYPE: ;$
3991 PPCODE:
3992 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3993
3994void
3995on_enter (SV *block)
3996 ALIAS:
3997 on_leave = 1
1821 PROTOTYPE: $ 3998 PROTOTYPE: &
1822 CODE: 3999 CODE:
1823{ 4000{
1824 struct io_state *data = (void *)data_; 4001 struct coro *coro = SvSTATE_current;
4002 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1825 4003
1826 errno = data->errorno; 4004 block = s_get_cv_croak (block);
1827 PL_laststype = data->laststype;
1828 PL_laststatval = data->laststatval;
1829 PL_statcache = data->statcache;
1830}
1831 4005
4006 if (!*avp)
4007 *avp = newAV ();
4008
4009 av_push (*avp, SvREFCNT_inc (block));
4010
4011 if (!ix)
4012 on_enterleave_call (aTHX_ block);
4013
4014 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4015 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4016 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4017}
4018
4019
4020MODULE = Coro::State PACKAGE = PerlIO::cede
4021
4022BOOT:
4023 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4024
4025
4026MODULE = Coro::State PACKAGE = Coro::Semaphore
4027
4028SV *
4029new (SV *klass, SV *count = 0)
4030 CODE:
4031{
4032 int semcnt = 1;
4033
4034 if (count)
4035 {
4036 SvGETMAGIC (count);
4037
4038 if (SvOK (count))
4039 semcnt = SvIV (count);
4040 }
4041
4042 RETVAL = sv_bless (
4043 coro_waitarray_new (aTHX_ semcnt),
4044 GvSTASH (CvGV (cv))
4045 );
4046}
4047 OUTPUT:
4048 RETVAL
4049
4050# helper for Coro::Channel and others
4051SV *
4052_alloc (int count)
4053 CODE:
4054 RETVAL = coro_waitarray_new (aTHX_ count);
4055 OUTPUT:
4056 RETVAL
4057
4058SV *
4059count (SV *self)
4060 CODE:
4061 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4062 OUTPUT:
4063 RETVAL
4064
4065void
4066up (SV *self, int adjust = 1)
4067 ALIAS:
4068 adjust = 1
4069 CODE:
4070 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4071
4072void
4073down (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4076
4077void
4078wait (...)
4079 CODE:
4080 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4081
4082void
4083try (SV *self)
4084 PPCODE:
4085{
4086 AV *av = (AV *)SvRV (self);
4087 SV *count_sv = AvARRAY (av)[0];
4088 IV count = SvIVX (count_sv);
4089
4090 if (count > 0)
4091 {
4092 --count;
4093 SvIVX (count_sv) = count;
4094 XSRETURN_YES;
4095 }
4096 else
4097 XSRETURN_NO;
4098}
4099
4100void
4101waiters (SV *self)
4102 PPCODE:
4103{
4104 AV *av = (AV *)SvRV (self);
4105 int wcount = AvFILLp (av) + 1 - 1;
4106
4107 if (GIMME_V == G_SCALAR)
4108 XPUSHs (sv_2mortal (newSViv (wcount)));
4109 else
4110 {
4111 int i;
4112 EXTEND (SP, wcount);
4113 for (i = 1; i <= wcount; ++i)
4114 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4115 }
4116}
4117
4118MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4119
4120void
4121_may_delete (SV *sem, int count, unsigned int extra_refs)
4122 PPCODE:
4123{
4124 AV *av = (AV *)SvRV (sem);
4125
4126 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4127 && AvFILLp (av) == 0 /* no waiters, just count */
4128 && SvIV (AvARRAY (av)[0]) == count)
4129 XSRETURN_YES;
4130
4131 XSRETURN_NO;
4132}
4133
4134MODULE = Coro::State PACKAGE = Coro::Signal
4135
4136SV *
4137new (SV *klass)
4138 CODE:
4139 RETVAL = sv_bless (
4140 coro_waitarray_new (aTHX_ 0),
4141 GvSTASH (CvGV (cv))
4142 );
4143 OUTPUT:
4144 RETVAL
4145
4146void
4147wait (...)
4148 CODE:
4149 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4150
4151void
4152broadcast (SV *self)
4153 CODE:
4154{
4155 AV *av = (AV *)SvRV (self);
4156 coro_signal_wake (aTHX_ av, AvFILLp (av));
4157}
4158
4159void
4160send (SV *self)
4161 CODE:
4162{
4163 AV *av = (AV *)SvRV (self);
4164
4165 if (AvFILLp (av))
4166 coro_signal_wake (aTHX_ av, 1);
4167 else
4168 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4169}
4170
4171IV
4172awaited (SV *self)
4173 CODE:
4174 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4175 OUTPUT:
4176 RETVAL
4177
4178
4179MODULE = Coro::State PACKAGE = Coro::AnyEvent
4180
4181BOOT:
4182 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4183
4184void
4185_schedule (...)
4186 CODE:
4187{
4188 static int incede;
4189
4190 api_cede_notself (aTHX);
4191
4192 ++incede;
4193 while (coro_nready >= incede && api_cede (aTHX))
4194 ;
4195
4196 sv_setsv (sv_activity, &PL_sv_undef);
4197 if (coro_nready >= incede)
4198 {
4199 PUSHMARK (SP);
4200 PUTBACK;
4201 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4202 }
4203
4204 --incede;
4205}
4206
4207
4208MODULE = Coro::State PACKAGE = Coro::AIO
4209
4210void
4211_register (char *target, char *proto, SV *req)
4212 CODE:
4213{
4214 SV *req_cv = s_get_cv_croak (req);
4215 /* newXSproto doesn't return the CV on 5.8 */
4216 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4217 sv_setpv ((SV *)slf_cv, proto);
4218 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4219}
4220
4221MODULE = Coro::State PACKAGE = Coro::Select
4222
4223void
4224patch_pp_sselect ()
4225 CODE:
4226 if (!coro_old_pp_sselect)
4227 {
4228 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4229 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4230 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4231 }
4232
4233void
4234unpatch_pp_sselect ()
4235 CODE:
4236 if (coro_old_pp_sselect)
4237 {
4238 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4239 coro_old_pp_sselect = 0;
4240 }
4241

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