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Comparing Coro/Coro/State.xs (file contents):
Revision 1.186 by root, Fri Oct 5 20:10:42 2007 UTC vs.
Revision 1.463 by root, Wed Jun 22 20:37:27 2016 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#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
11#include <stdio.h> 23#include <stdio.h>
12#include <errno.h> 24#include <errno.h>
13#include <assert.h> 25#include <assert.h>
14 26
15#ifdef HAVE_MMAP 27#ifndef SvREFCNT_dec_NN
16# include <unistd.h> 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
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 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
24# endif 47# endif
25# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
29static long pagesize; 52# define PadMAX AvFILLp
30# else 53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
33#else 74#else
34# define PAGESIZE 0 75# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif
37
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 76#endif
44 77
45/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
47 80
48#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 82# 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 83#endif
87 84
88/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 88#endif
92 89
93/* The next macros try to return the current stack pointer, in an as 90/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 91 * 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 92#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
103#else 95#else
104# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
106#endif 98#endif
107 99
108#define NOINLINE attribute ((noinline)) 100#define IN_DESTRUCT PL_dirty
109 101
110#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
111 104
112#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 106# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 108# endif
109#endif
120 110
121/* helper storage struct for Coro::AIO */ 111#ifdef __linux
122struct io_state 112# include <time.h> /* for timespec */
123{ 113# include <syscall.h> /* for SYS_* */
124 int errorno; 114# ifdef SYS_clock_gettime
125 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 118# endif
119#endif
129 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 130static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136 136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
137static GV *irsgv; /* $/ */ 141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
138 145
139/* async_pool helper stuff */ 146/* async_pool helper stuff */
140static SV *sv_pool_rss; 147static SV *sv_pool_rss;
141static SV *sv_pool_size; 148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
142static AV *av_async_pool; 150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
143 162
144static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
146 165
147enum { 166enum
167{
148 CC_MAPPED = 0x01, 168 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */ 169 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04, 170 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */ 171 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */ 172 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154}; 174};
155 175
156/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx { 177typedef struct coro_cctx
178{
158 struct coro_cctx *next; 179 struct coro_cctx *next;
159 180
160 /* the stack */ 181 /* the stack */
161 void *sptr; 182 struct coro_stack stack;
162 size_t ssize;
163 183
164 /* cpu state */ 184 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
167 JMPENV *top_env; 189 JMPENV *top_env;
168 coro_context cctx; 190 coro_context cctx;
169 191
192 U32 gen;
170#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
171 int valgrind_id; 194 int valgrind_id;
172#endif 195#endif
173 unsigned char flags; 196 unsigned char flags;
174} coro_cctx; 197} coro_cctx;
175 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
176enum { 205enum
206{
177 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
181}; 213};
182 214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218 #define VARx(name,expr,type) type name;
219 #include "state.h"
220} perl_slots;
221
222/* how many context stack entries do we need for perl_slots */
223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
224
183/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
184struct coro { 226struct coro
227{
185 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
186 coro_cctx *cctx; 229 coro_cctx *cctx;
187 230
231 /* ready queue */
232 struct coro *next_ready;
233
234 /* state data */
235 struct CoroSLF slf_frame; /* saved slf frame */
236 AV *mainstack;
237 perl_slots *slot; /* basically the saved sp */
238
239 CV *startcv; /* the CV to execute */
188 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */ 241 int flags; /* CF_ flags */
192 242 HV *hv; /* the perl hash associated with this coro, if any */
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204 243
205 /* statistics */ 244 /* statistics */
206 int usecount; /* number of transfers to this coro */ 245 int usecount; /* number of transfers to this coro */
207 246
208 /* coro process data */ 247 /* coro process data */
209 int prio; 248 int prio;
210 //SV *throw; 249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
211 253
212 /* async_pool */ 254 /* async_pool */
213 SV *saved_deffh; 255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
214 268
215 /* linked list */ 269 /* linked list */
216 struct coro *next, *prev; 270 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
218}; 271};
219 272
220typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
221typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
222 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
223/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
224 282
225#define PRIO_MAX 3 283#define CORO_PRIO_MAX 3
226#define PRIO_HIGH 1 284#define CORO_PRIO_HIGH 1
227#define PRIO_NORMAL 0 285#define CORO_PRIO_NORMAL 0
228#define PRIO_LOW -1 286#define CORO_PRIO_LOW -1
229#define PRIO_IDLE -3 287#define CORO_PRIO_IDLE -3
230#define PRIO_MIN -4 288#define CORO_PRIO_MIN -4
231 289
232/* for Coro.pm */ 290/* for Coro.pm */
233static SV *coro_current; 291static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static SV *coro_readyhook;
235static int coro_nready; 293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
236static struct coro *coro_first; 295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
329{
330 dSP;
331 PUSHMARK (SP - 4); /* fake argument list */
332 XPUSHs (coro_select_select);
333 PUTBACK;
334
335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
336 PL_op->op_flags |= OPf_STACKED;
337 PL_op->op_private = 0;
338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
376 SV **svp;
377
378 require_pv ("Time/HiRes.pm");
379
380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
381
382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
237 392
238/** lowlevel stuff **********************************************************/ 393/** lowlevel stuff **********************************************************/
239 394
240static AV * 395static SV * ecb_noinline
396coro_get_sv (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_sv (name, create);
401#endif
402 return get_sv (name, create);
403}
404
405static AV * ecb_noinline
406coro_get_av (pTHX_ const char *name, int create)
407{
408#if PERL_VERSION_ATLEAST (5,10,0)
409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
410 get_av (name, create);
411#endif
412 return get_av (name, create);
413}
414
415static HV * ecb_noinline
416coro_get_hv (pTHX_ const char *name, int create)
417{
418#if PERL_VERSION_ATLEAST (5,10,0)
419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
420 get_hv (name, create);
421#endif
422 return get_hv (name, create);
423}
424
425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
241coro_clone_padlist (pTHX_ CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
242{ 532{
243 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
245 538
246 newpadlist = newAV (); 539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
247 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif 568#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist);
255 569
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
257 av_store (newpadlist, 1, (SV *)newpad); 571 PadlistMAX (newpadlist) = 1;
572
573 padnames = PadlistNAMES (padlist);
574 ++PadnamelistREFCNT (padnames);
575 PadlistNAMES (newpadlist) = padnames;
576
577 PadlistARRAY (newpadlist)[1] = newpad;
258 578
259 return newpadlist; 579 return newpadlist;
260} 580}
261 581
262static void 582ecb_inline void
263free_padlist (pTHX_ AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
264{ 584{
265 /* may be during global destruction */ 585 /* may be during global destruction */
266 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
267 { 587 {
268 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
269 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
270 { 591 {
271 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
272 if (svp) 595 if (pad)
273 { 596 {
274 SV *sv; 597 I32 j = PadMAX (pad);
275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
276 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
277 601
602 PadMAX (pad) = -1;
278 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
279 } 604 }
280 } 605 }
281 606
607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
608
609#if NEWPADAPI
610 Safefree (PadlistARRAY (padlist));
611 Safefree (padlist);
612#else
613 AvFILLp (padlist) = -1;
614 AvREAL_off (padlist);
282 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
283 } 617 }
284} 618}
285 619
286static int 620static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{ 622{
289 AV *padlist; 623 PADLIST *padlist;
290 AV *av = (AV *)mg->mg_obj; 624 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
625 size_t len = *(size_t *)mg->mg_ptr;
291 626
292 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
294 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
295
296 SvREFCNT_dec (av);
297 633
298 return 0; 634 return 0;
299} 635}
300 636
301#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
302 638 0, 0, 0, 0,
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
304 640};
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337 641
338/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
339static void 643ecb_inline void
340get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
341{ 645{
342 MAGIC *mg = CORO_MAGIC (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
343 AV *av; 647 size_t *lenp;
344 648
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
347 else 651 else
348 { 652 {
349#if CORO_PREFER_PERL_FUNCTIONS 653#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
351 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
352 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
355#else 660#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
357#endif 662#endif
358 } 663 }
359} 664}
360 665
361static void 666ecb_inline void
362put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
363{ 668{
364 MAGIC *mg = CORO_MAGIC (cv); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
365 AV *av;
366 670
367 if (!mg) 671 if (ecb_expect_false (!mg))
368 {
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 } 672 {
673 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
674 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
675 mg->mg_len = 1; /* so mg_free frees mg_ptr */
676 }
677 else
678 Renew (mg->mg_ptr,
679 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
680 char);
374 681
375 av = (AV *)mg->mg_obj; 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
376
377 if (AvFILLp (av) >= AvMAX (av))
378 av_extend (av, AvMAX (av) + 1);
379
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381} 683}
382 684
383/** load & save, init *******************************************************/ 685/** load & save, init *******************************************************/
384 686
687ecb_inline void
688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
692
693 /* swap sv_any */
694 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
695
696 /* swap sv_flags */
697 SvFLAGS (&tmp) = SvFLAGS (a);
698 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
699 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
700
701#if PERL_VERSION_ATLEAST (5,10,0)
702 /* perl 5.10 and later complicates this _quite_ a bit, but it also
703 * is much faster, so no quarrels here. alternatively, we could
704 * sv_upgrade to avoid this.
705 */
706 {
707 /* swap sv_u */
708 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
709
710 /* if SvANY points to the head, we need to adjust the pointers,
711 * as the pointer for a still points to b, and maybe vice versa.
712 */
713 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
714 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
715 svany_in_head_set |= 1 << SVt_NV;
716 #endif
717
718 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
719
720 if (svany_in_head (SvTYPE (a)))
721 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
722
723 if (svany_in_head (SvTYPE (b)))
724 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
725 }
726#endif
727}
728
729/* swap sv heads, at least logically */
730static void
731swap_svs_enter (pTHX_ Coro__State c)
732{
733 int i;
734
735 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
736 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
737}
738
739static void
740swap_svs_leave (pTHX_ Coro__State c)
741{
742 int i;
743
744 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
745 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
746}
747
748#define SWAP_SVS_ENTER(coro) \
749 if (ecb_expect_false ((coro)->swap_sv)) \
750 swap_svs_enter (aTHX_ (coro))
751
752#define SWAP_SVS_LEAVE(coro) \
753 if (ecb_expect_false ((coro)->swap_sv)) \
754 swap_svs_leave (aTHX_ (coro))
755
756static void
757on_enterleave_call (pTHX_ SV *cb);
758
385static void 759static void
386load_perl (pTHX_ Coro__State c) 760load_perl (pTHX_ Coro__State c)
387{ 761{
388#define VAR(name,type) PL_ ## name = c->name; 762 perl_slots *slot = c->slot;
763 c->slot = 0;
764
765 PL_mainstack = c->mainstack;
766
767#if CORO_JIT
768 load_perl_slots (slot);
769#else
770 #define VARx(name,expr,type) expr = slot->name;
389# include "state.h" 771 #include "state.h"
390#undef VAR 772#endif
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 GvSV (irsgv) = c->irssv_sv;
396 773
397 { 774 {
398 dSP; 775 dSP;
776
399 CV *cv; 777 CV *cv;
400 778
401 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
402 while ((cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
403 { 781 {
404 put_padlist (aTHX_ cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
405 CvDEPTH (cv) = PTR2IV (POPs); 783 CvDEPTH (cv) = PTR2IV (POPs);
406 CvPADLIST (cv) = (AV *)POPs; 784 CvPADLIST (cv) = (PADLIST *)POPs;
407 } 785 }
408 786
409 PUTBACK; 787 PUTBACK;
410 } 788 }
789
790 slf_frame = c->slf_frame;
791 CORO_THROW = c->except;
792
793 if (ecb_expect_false (enable_times))
794 {
795 if (ecb_expect_false (!times_valid))
796 coro_times_update ();
797
798 coro_times_sub (c);
799 }
800
801 if (ecb_expect_false (c->on_enter))
802 {
803 int i;
804
805 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
806 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
807 }
808
809 if (ecb_expect_false (c->on_enter_xs))
810 {
811 int i;
812
813 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
815 }
816
817 SWAP_SVS_ENTER (c);
411} 818}
412 819
413static void 820static void
414save_perl (pTHX_ Coro__State c) 821save_perl (pTHX_ Coro__State c)
415{ 822{
823 SWAP_SVS_LEAVE (c);
824
825 if (ecb_expect_false (c->on_leave_xs))
826 {
827 int i;
828
829 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
830 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
831 }
832
833 if (ecb_expect_false (c->on_leave))
834 {
835 int i;
836
837 for (i = AvFILLp (c->on_leave); i >= 0; --i)
838 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
839 }
840
841 times_valid = 0;
842
843 if (ecb_expect_false (enable_times))
844 {
845 coro_times_update (); times_valid = 1;
846 coro_times_add (c);
847 }
848
849 c->except = CORO_THROW;
850 c->slf_frame = slf_frame;
851
416 { 852 {
417 dSP; 853 dSP;
418 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
419 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
420 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
426 862
427 XPUSHs (Nullsv); 863 XPUSHs (Nullsv);
428 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
429 for (;;) 865 for (;;)
430 { 866 {
431 while (cxix >= 0) 867 while (ecb_expect_true (cxix >= 0))
432 { 868 {
433 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
434 870
435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
436 { 872 {
437 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
438 874
439 if (CvDEPTH (cv)) 875 if (ecb_expect_true (CvDEPTH (cv)))
440 { 876 {
441 EXTEND (SP, 3); 877 EXTEND (SP, 3);
442 PUSHs ((SV *)CvPADLIST (cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
444 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
445 881
446 CvDEPTH (cv) = 0; 882 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv); 883 get_padlist (aTHX_ cv);
448 } 884 }
449 } 885 }
450 } 886 }
451 887
452 if (top_si->si_type == PERLSI_MAIN) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
453 break; 889 break;
454 890
455 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
456 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
457 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
458 } 894 }
459 895
460 PUTBACK; 896 PUTBACK;
461 } 897 }
462 898
463 c->defav = GvAV (PL_defgv); 899 /* allocate some space on the context stack for our purposes */
464 c->defsv = DEFSV; 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
465 c->errsv = ERRSV; 901 {
466 c->irssv_sv = GvSV (irsgv); 902 unsigned int i;
467 903
468#define VAR(name,type)c->name = PL_ ## name; 904 for (i = 0; i < SLOT_COUNT; ++i)
905 CXINC;
906
907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
908 }
909
910 c->mainstack = PL_mainstack;
911
912 {
913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
914
915#if CORO_JIT
916 save_perl_slots (slot);
917#else
918 #define VARx(name,expr,type) slot->name = expr;
469# include "state.h" 919 #include "state.h"
470#undef VAR 920#endif
921 }
471} 922}
472 923
473/* 924/*
474 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
475 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
478 */ 929 */
479#if CORO_PREFER_PERL_FUNCTIONS 930#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks 931# define coro_init_stacks(thx) init_stacks ()
481#else 932#else
482static void 933static void
483coro_init_stacks (pTHX) 934coro_init_stacks (pTHX)
484{ 935{
485 PL_curstackinfo = new_stackinfo(64, 6); 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
486 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489 940
490 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base; 942 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 943 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493 944
494 New(50,PL_tmps_stack,64,SV*); 945 New(50,PL_tmps_stack,32,SV*);
495 PL_tmps_floor = -1; 946 PL_tmps_floor = -1;
496 PL_tmps_ix = -1; 947 PL_tmps_ix = -1;
497 PL_tmps_max = 64; 948 PL_tmps_max = 32;
498 949
499 New(54,PL_markstack,16,I32); 950 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack; 951 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16; 952 PL_markstack_max = PL_markstack + 16;
502 953
503#ifdef SET_MARK_OFFSET 954#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET; 955 SET_MARK_OFFSET;
505#endif 956#endif
506 957
507 New(54,PL_scopestack,16,I32); 958 New(54,PL_scopestack,8,I32);
508 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16; 960 PL_scopestack_max = 8;
961#if HAS_SCOPESTACK_NAME
962 New(54,PL_scopestack_name,8,const char*);
963#endif
510 964
511 New(54,PL_savestack,64,ANY); 965 New(54,PL_savestack,24,ANY);
512 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
513 PL_savestack_max = 64; 967 PL_savestack_max = 24;
514
515#if !PERL_VERSION_ATLEAST (5,9,0) 968#if !PERL_VERSION_ATLEAST (5,24,0)
969 /* perl 5.24 moves SS_MAXPUSH optimisation from */
970 /* the header macros to PL_savestack_max */
971 PL_savestack_max -= SS_MAXPUSH;
972#endif
973
974#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,4,OP*); 975 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 976 PL_retstack_ix = 0;
518 PL_retstack_max = 4; 977 PL_retstack_max = 4;
519#endif 978#endif
520} 979}
… …
522 981
523/* 982/*
524 * destroy the stacks, the callchain etc... 983 * destroy the stacks, the callchain etc...
525 */ 984 */
526static void 985static void
527coro_destroy_stacks (pTHX) 986coro_destruct_stacks (pTHX)
528{ 987{
529 while (PL_curstackinfo->si_next) 988 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next; 989 PL_curstackinfo = PL_curstackinfo->si_next;
531 990
532 while (PL_curstackinfo) 991 while (PL_curstackinfo)
… …
542 } 1001 }
543 1002
544 Safefree (PL_tmps_stack); 1003 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 1004 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 1005 Safefree (PL_scopestack);
1006#if HAS_SCOPESTACK_NAME
1007 Safefree (PL_scopestack_name);
1008#endif
547 Safefree (PL_savestack); 1009 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 1010#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 1011 Safefree (PL_retstack);
550#endif 1012#endif
551} 1013}
1014
1015#define CORO_RSS \
1016 rss += sizeof (SYM (curstackinfo)); \
1017 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1018 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1019 rss += SYM (tmps_max) * sizeof (SV *); \
1020 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1021 rss += SYM (scopestack_max) * sizeof (I32); \
1022 rss += SYM (savestack_max) * sizeof (ANY);
552 1023
553static size_t 1024static size_t
554coro_rss (pTHX_ struct coro *coro) 1025coro_rss (pTHX_ struct coro *coro)
555{ 1026{
556 size_t rss = sizeof (*coro); 1027 size_t rss = sizeof (*coro);
557 1028
558 if (coro->mainstack) 1029 if (coro->mainstack)
559 { 1030 {
560 if (coro->flags & CF_RUNNING) 1031 if (coro->flags & CF_RUNNING)
561 { 1032 {
562 #define VAR(name,type)coro->name = PL_ ## name; 1033 #define SYM(sym) PL_ ## sym
563 # include "state.h" 1034 CORO_RSS;
564 #undef VAR 1035 #undef SYM
565 } 1036 }
566 1037 else
567 rss += sizeof (coro->curstackinfo); 1038 {
568 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 1039 #define SYM(sym) coro->slot->sym
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1040 CORO_RSS;
570 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 1041 #undef SYM
571 rss += coro->tmps_max * sizeof (SV *); 1042 }
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575
576#if !PERL_VERSION_ATLEAST (5,9,0)
577 rss += coro->retstack_max * sizeof (OP *);
578#endif
579 } 1043 }
580 1044
581 return rss; 1045 return rss;
582} 1046}
583 1047
584/** coroutine stack handling ************************************************/ 1048/** coroutine stack handling ************************************************/
585 1049
1050static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1051static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1052static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1053
1054/* apparently < 5.8.8 */
1055#ifndef MgPV_nolen_const
1056#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1057 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1058 (const char*)(mg)->mg_ptr)
1059#endif
1060
1061/*
1062 * This overrides the default magic get method of %SIG elements.
1063 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1064 * and instead of trying to save and restore the hash elements (extremely slow),
1065 * we just provide our own readback here.
1066 */
1067static int ecb_cold
1068coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1069{
1070 const char *s = MgPV_nolen_const (mg);
1071
1072 if (*s == '_')
1073 {
1074 SV **svp = 0;
1075
1076 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1077 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1078
1079 if (svp)
1080 {
1081 SV *ssv;
1082
1083 if (!*svp)
1084 ssv = &PL_sv_undef;
1085 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1086 ssv = sv_2mortal (newRV_inc (*svp));
1087 else
1088 ssv = *svp;
1089
1090 sv_setsv (sv, ssv);
1091 return 0;
1092 }
1093 }
1094
1095 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1096}
1097
1098static int ecb_cold
1099coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1100{
1101 const char *s = MgPV_nolen_const (mg);
1102
1103 if (*s == '_')
1104 {
1105 SV **svp = 0;
1106
1107 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1108 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1109
1110 if (svp)
1111 {
1112 SV *old = *svp;
1113 *svp = 0;
1114 SvREFCNT_dec (old);
1115 return 0;
1116 }
1117 }
1118
1119 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1120}
1121
1122static int ecb_cold
1123coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1124{
1125 const char *s = MgPV_nolen_const (mg);
1126
1127 if (*s == '_')
1128 {
1129 SV **svp = 0;
1130
1131 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1132 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1133
1134 if (svp)
1135 {
1136 SV *old = *svp;
1137 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1138 SvREFCNT_dec (old);
1139 return 0;
1140 }
1141 }
1142
1143 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1144}
1145
1146static void
1147prepare_nop (pTHX_ struct coro_transfer_args *ta)
1148{
1149 /* kind of mega-hacky, but works */
1150 ta->next = ta->prev = (struct coro *)ta;
1151}
1152
586static void 1153static int
1154slf_check_nop (pTHX_ struct CoroSLF *frame)
1155{
1156 return 0;
1157}
1158
1159static int
1160slf_check_repeat (pTHX_ struct CoroSLF *frame)
1161{
1162 return 1;
1163}
1164
1165static UNOP init_perl_op;
1166
1167ecb_noinline static void /* noinline to keep it out of the transfer fast path */
587coro_setup (pTHX_ struct coro *coro) 1168init_perl (pTHX_ struct coro *coro)
588{ 1169{
589 /* 1170 /*
590 * emulate part of the perl startup here. 1171 * emulate part of the perl startup here.
591 */ 1172 */
592 coro_init_stacks (aTHX); 1173 coro_init_stacks (aTHX);
593 1174
594 PL_runops = RUNOPS_DEFAULT; 1175 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 1176 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 1177 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 1178 PL_comppad = 0;
1179 PL_comppad_name = 0;
1180 PL_comppad_name_fill = 0;
1181 PL_comppad_name_floor = 0;
598 PL_curpm = 0; 1182 PL_curpm = 0;
1183 PL_curpad = 0;
599 PL_localizing = 0; 1184 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0; 1185 PL_restartop = 0;
602 1186#if PERL_VERSION_ATLEAST (5,10,0)
1187 PL_parser = 0;
1188#endif
1189 PL_hints = 0;
1190
1191 /* recreate the die/warn hooks */
1192 PL_diehook = SvREFCNT_inc (rv_diehook);
1193 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1194
603 GvSV (PL_defgv) = NEWSV (0, 0); 1195 GvSV (PL_defgv) = newSV (0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0; 1196 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0); 1197 GvSV (PL_errgv) = newSV (0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1198 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1199 GvHV (PL_hintgv) = newHV ();
1200#if PERL_VERSION_ATLEAST (5,10,0)
1201 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1202#endif
607 PL_rs = newSVsv (GvSV (irsgv)); 1203 PL_rs = newSVsv (GvSV (irsgv));
608 1204 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
609 {
610 IO *io = newIO ();
611 PL_defoutgv = (GV *)NEWSV (0, 0);
612 gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 GvIOp (PL_defoutgv) = io;
617 }
618 1205
619 { 1206 {
620 dSP; 1207 dSP;
621 LOGOP myop; 1208 UNOP myop;
622 1209
623 Zero (&myop, 1, LOGOP); 1210 Zero (&myop, 1, UNOP);
624 myop.op_next = Nullop; 1211 myop.op_next = Nullop;
1212 myop.op_type = OP_ENTERSUB;
625 myop.op_flags = OPf_WANT_VOID; 1213 myop.op_flags = OPf_WANT_VOID;
626 1214
627 PUSHMARK (SP); 1215 PUSHMARK (SP);
628 XPUSHs (av_shift (GvAV (PL_defgv))); 1216 PUSHs ((SV *)coro->startcv);
629 PUTBACK; 1217 PUTBACK;
630 PL_op = (OP *)&myop; 1218 PL_op = (OP *)&myop;
631 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1219 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
632 SPAGAIN;
633 } 1220 }
634 1221
635 ENTER; /* necessary e.g. for dounwind */ 1222 /* this newly created coroutine might be run on an existing cctx which most
636} 1223 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1224 */
1225 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1226 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1227 slf_frame.destroy = 0;
637 1228
1229 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1230 init_perl_op.op_next = PL_op;
1231 init_perl_op.op_type = OP_ENTERSUB;
1232 init_perl_op.op_ppaddr = pp_slf;
1233 /* no flags etc. required, as an init function won't be called */
1234
1235 PL_op = (OP *)&init_perl_op;
1236
1237 /* copy throw, in case it was set before init_perl */
1238 CORO_THROW = coro->except;
1239
1240 SWAP_SVS_ENTER (coro);
1241
1242 if (ecb_expect_false (enable_times))
1243 {
1244 coro_times_update ();
1245 coro_times_sub (coro);
1246 }
1247}
1248
638static void 1249static void
639coro_destroy (pTHX_ struct coro *coro) 1250coro_unwind_stacks (pTHX)
640{ 1251{
641 if (!IN_DESTRUCT) 1252 if (!IN_DESTRUCT)
642 { 1253 {
643 /* restore all saved variables and stuff */ 1254 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0); 1255 LEAVE_SCOPE (0);
… …
652 POPSTACK_TO (PL_mainstack); 1263 POPSTACK_TO (PL_mainstack);
653 1264
654 /* unwind main stack */ 1265 /* unwind main stack */
655 dounwind (-1); 1266 dounwind (-1);
656 } 1267 }
1268}
657 1269
658 SvREFCNT_dec (GvSV (PL_defgv)); 1270static void
659 SvREFCNT_dec (GvAV (PL_defgv)); 1271destroy_perl (pTHX_ struct coro *coro)
660 SvREFCNT_dec (GvSV (PL_errgv)); 1272{
661 SvREFCNT_dec (PL_defoutgv); 1273 SV *svf [9];
662 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv));
664 1274
1275 {
1276 SV *old_current = SvRV (coro_current);
1277 struct coro *current = SvSTATE (old_current);
1278
1279 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1280
1281 save_perl (aTHX_ current);
1282
1283 /* this will cause transfer_check to croak on block*/
1284 SvRV_set (coro_current, (SV *)coro->hv);
1285
1286 load_perl (aTHX_ coro);
1287
1288 /* restore swapped sv's */
1289 SWAP_SVS_LEAVE (coro);
1290
1291 coro_unwind_stacks (aTHX);
1292
1293 coro_destruct_stacks (aTHX);
1294
1295 /* now save some sv's to be free'd later */
1296 svf [0] = GvSV (PL_defgv);
1297 svf [1] = (SV *)GvAV (PL_defgv);
1298 svf [2] = GvSV (PL_errgv);
1299 svf [3] = (SV *)PL_defoutgv;
1300 svf [4] = PL_rs;
1301 svf [5] = GvSV (irsgv);
1302 svf [6] = (SV *)GvHV (PL_hintgv);
1303 svf [7] = PL_diehook;
1304 svf [8] = PL_warnhook;
1305 assert (9 == sizeof (svf) / sizeof (*svf));
1306
1307 SvRV_set (coro_current, old_current);
1308
1309 load_perl (aTHX_ current);
1310 }
1311
1312 {
1313 unsigned int i;
1314
1315 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1316 SvREFCNT_dec (svf [i]);
1317
665 SvREFCNT_dec (coro->saved_deffh); 1318 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw); 1319 SvREFCNT_dec (coro->rouse_cb);
667 1320 SvREFCNT_dec (coro->invoke_cb);
668 coro_destroy_stacks (aTHX); 1321 SvREFCNT_dec (coro->invoke_av);
1322 SvREFCNT_dec (coro->on_enter_xs);
1323 SvREFCNT_dec (coro->on_leave_xs);
1324 }
669} 1325}
670 1326
671static void 1327ecb_inline void
672free_coro_mortal (pTHX) 1328free_coro_mortal (pTHX)
673{ 1329{
674 if (coro_mortal) 1330 if (ecb_expect_true (coro_mortal))
675 { 1331 {
676 SvREFCNT_dec (coro_mortal); 1332 SvREFCNT_dec ((SV *)coro_mortal);
677 coro_mortal = 0; 1333 coro_mortal = 0;
678 } 1334 }
679} 1335}
680 1336
681static int 1337static int
682runops_trace (pTHX) 1338runops_trace (pTHX)
683{ 1339{
684 COP *oldcop = 0; 1340 COP *oldcop = 0;
685 int oldcxix = -2; 1341 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx;
688 1342
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1343 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 { 1344 {
691 PERL_ASYNC_CHECK (); 1345 PERL_ASYNC_CHECK ();
692 1346
693 if (cctx->flags & CC_TRACE_ALL) 1347 if (cctx_current->flags & CC_TRACE_ALL)
694 { 1348 {
695 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1349 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
696 { 1350 {
697 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1351 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
698 SV **bot, **top; 1352 SV **bot, **top;
699 AV *av = newAV (); /* return values */ 1353 AV *av = newAV (); /* return values */
700 SV **cb; 1354 SV **cb;
… …
708 bot = PL_stack_base + cx->blk_oldsp + 1; 1362 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1 1363 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1 1364 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot; 1365 : bot;
712 1366
1367 av_extend (av, top - bot);
713 while (bot < top) 1368 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++)); 1369 av_push (av, SvREFCNT_inc_NN (*bot++));
715 1370
716 PL_runops = RUNOPS_DEFAULT; 1371 PL_runops = RUNOPS_DEFAULT;
717 ENTER; 1372 ENTER;
718 SAVETMPS; 1373 SAVETMPS;
719 EXTEND (SP, 3); 1374 EXTEND (SP, 3);
… …
736 1391
737 if (PL_curcop != &PL_compiling) 1392 if (PL_curcop != &PL_compiling)
738 { 1393 {
739 SV **cb; 1394 SV **cb;
740 1395
741 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1396 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
742 { 1397 {
743 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1398 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744 1399
745 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1400 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
746 { 1401 {
747 runops_proc_t old_runops = PL_runops;
748 dSP; 1402 dSP;
749 GV *gv = CvGV (cx->blk_sub.cv); 1403 GV *gv = CvGV (cx->blk_sub.cv);
750 SV *fullname = sv_2mortal (newSV (0)); 1404 SV *fullname = sv_2mortal (newSV (0));
751 1405
752 if (isGV (gv)) 1406 if (isGV (gv))
… …
757 SAVETMPS; 1411 SAVETMPS;
758 EXTEND (SP, 3); 1412 EXTEND (SP, 3);
759 PUSHMARK (SP); 1413 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes); 1414 PUSHs (&PL_sv_yes);
761 PUSHs (fullname); 1415 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1416 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK; 1417 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1418 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
765 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1419 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN; 1420 SPAGAIN;
767 FREETMPS; 1421 FREETMPS;
… …
770 } 1424 }
771 1425
772 oldcxix = cxstack_ix; 1426 oldcxix = cxstack_ix;
773 } 1427 }
774 1428
775 if (cctx->flags & CC_TRACE_LINE) 1429 if (cctx_current->flags & CC_TRACE_LINE)
776 { 1430 {
777 dSP; 1431 dSP;
778 1432
779 PL_runops = RUNOPS_DEFAULT; 1433 PL_runops = RUNOPS_DEFAULT;
780 ENTER; 1434 ENTER;
… …
799 1453
800 TAINT_NOT; 1454 TAINT_NOT;
801 return 0; 1455 return 0;
802} 1456}
803 1457
804/* inject a fake call to Coro::State::_cctx_init into the execution */ 1458static struct CoroSLF cctx_ssl_frame;
805/* _cctx_init should be careful, as it could be called at almost any time */
806/* during execution of a perl program */
807static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx)
809{
810 dSP;
811 LOGOP myop;
812 1459
1460static void
1461slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1462{
1463 ta->prev = 0;
1464}
1465
1466static int
1467slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1468{
1469 *frame = cctx_ssl_frame;
1470
1471 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1472}
1473
1474/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1475static void ecb_noinline
1476cctx_prepare (pTHX)
1477{
813 PL_top_env = &PL_start_env; 1478 PL_top_env = &PL_start_env;
814 1479
815 if (cctx->flags & CC_TRACE) 1480 if (cctx_current->flags & CC_TRACE)
816 PL_runops = runops_trace; 1481 PL_runops = runops_trace;
817 1482
818 Zero (&myop, 1, LOGOP); 1483 /* we already must be executing an SLF op, there is no other valid way
819 myop.op_next = PL_op; 1484 * that can lead to creation of a new cctx */
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1485 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1486 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
821 1487
822 PUSHMARK (SP); 1488 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
823 EXTEND (SP, 2); 1489 cctx_ssl_frame = slf_frame;
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1490
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1491 slf_frame.prepare = slf_prepare_set_stacklevel;
826 PUTBACK; 1492 slf_frame.check = slf_check_set_stacklevel;
827 PL_op = (OP *)&myop; 1493}
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1494
829 SPAGAIN; 1495/* the tail of transfer: execute stuff we can only do after a transfer */
1496ecb_inline void
1497transfer_tail (pTHX)
1498{
1499 free_coro_mortal (aTHX);
1500}
1501
1502/* try to exit the same way perl's main function would do */
1503/* we do not bother resetting the environment or other things *7
1504/* that are not, uhm, essential */
1505/* this obviously also doesn't work when perl is embedded */
1506static void ecb_noinline ecb_cold
1507perlish_exit (pTHX)
1508{
1509 int exitstatus = perl_destruct (PL_curinterp);
1510 perl_free (PL_curinterp);
1511 exit (exitstatus);
830} 1512}
831 1513
832/* 1514/*
833 * this is a _very_ stripped down perl interpreter ;) 1515 * this is a _very_ stripped down perl interpreter ;)
834 */ 1516 */
835static void 1517static void
836coro_run (void *arg) 1518cctx_run (void *arg)
837{ 1519{
1520#ifdef USE_ITHREADS
1521# if CORO_PTHREAD
1522 PERL_SET_CONTEXT (coro_thx);
1523# endif
1524#endif
1525 {
838 dTHX; 1526 dTHX;
839 1527
840 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1528 /* normally we would need to skip the entersub here */
841 UNLOCK; 1529 /* not doing so will re-execute it, which is exactly what we want */
842
843 /* we now skip the entersub that lead to transfer() */
844 PL_op = PL_op->op_next; 1530 /* PL_nop = PL_nop->op_next */
845 1531
846 /* inject a fake subroutine call to cctx_init */ 1532 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg); 1533 cctx_prepare (aTHX);
848 1534
1535 /* cctx_run is the alternative tail of transfer() */
1536 transfer_tail (aTHX);
1537
849 /* somebody or something will hit me for both perl_run and PL_restartop */ 1538 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op; 1539 PL_restartop = PL_op;
851 perl_run (PL_curinterp); 1540 perl_run (PL_curinterp);
852
853 /* 1541 /*
1542 * Unfortunately, there is no way to get at the return values of the
1543 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1544 * runtime errors here, as this is just a random interpreter, not a thread.
1545 */
1546
1547 /*
1548 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1549 * requires PL_scopestack_ix, so do it here if required.
1550 */
1551 if (!PL_scopestack_ix)
1552 ENTER;
1553
1554 /*
854 * If perl-run returns we assume exit() was being called or the coro 1555 * If perl-run returns we assume exit() was being called or the coro
855 * fell off the end, which seems to be the only valid (non-bug) 1556 * fell off the end, which seems to be the only valid (non-bug)
856 * reason for perl_run to return. We try to exit by jumping to the 1557 * reason for perl_run to return. We try to mimic whatever perl is normally
857 * bootstrap-time "top" top_env, as we cannot restore the "main" 1558 * doing in that case. YMMV.
858 * coroutine as Coro has no such concept
859 */ 1559 */
860 PL_top_env = main_top_env; 1560 perlish_exit (aTHX);
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1561 }
862} 1562}
863 1563
864static coro_cctx * 1564static coro_cctx *
865cctx_new () 1565cctx_new (void)
866{ 1566{
867 coro_cctx *cctx; 1567 coro_cctx *cctx;
868 void *stack_start;
869 size_t stack_size;
870 1568
871 ++cctx_count; 1569 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx); 1570 New (0, cctx, 1, coro_cctx);
874 1571
875#if HAVE_MMAP 1572 cctx->gen = cctx_gen;
1573 cctx->flags = 0;
1574 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
876 1575
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1576 return cctx;
878 /* mmap supposedly does allocate-on-write for us */ 1577}
879 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880 1578
881 if (cctx->sptr != (void *)-1) 1579/* create a new cctx only suitable as source */
882 { 1580static coro_cctx *
883# if CORO_STACKGUARD 1581cctx_new_empty (void)
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1582{
885# endif 1583 coro_cctx *cctx = cctx_new ();
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1584
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1585 cctx->stack.sptr = 0;
888 cctx->flags |= CC_MAPPED; 1586 coro_create (&cctx->cctx, 0, 0, 0, 0);
1587
1588 return cctx;
1589}
1590
1591/* create a new cctx suitable as destination/running a perl interpreter */
1592static coro_cctx *
1593cctx_new_run (void)
1594{
1595 coro_cctx *cctx = cctx_new ();
1596
1597 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
889 } 1598 {
890 else
891#endif
892 {
893 cctx->ssize = coro_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long);
895
896 if (!cctx->sptr)
897 {
898 perror ("FATAL: unable to allocate stack for coroutine"); 1599 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
899 _exit (EXIT_FAILURE); 1600 _exit (EXIT_FAILURE);
900 }
901
902 stack_start = cctx->sptr;
903 stack_size = cctx->ssize;
904 } 1601 }
905 1602
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1603 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
908 1604
909 return cctx; 1605 return cctx;
910} 1606}
911 1607
912static void 1608static void
913cctx_destroy (coro_cctx *cctx) 1609cctx_destroy (coro_cctx *cctx)
914{ 1610{
915 if (!cctx) 1611 if (!cctx)
916 return; 1612 return;
917 1613
1614 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1615
918 --cctx_count; 1616 --cctx_count;
1617 coro_destroy (&cctx->cctx);
919 1618
920#if CORO_USE_VALGRIND 1619 coro_stack_free (&cctx->stack);
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
922#endif
923
924#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize);
927 else
928#endif
929 Safefree (cctx->sptr);
930 1620
931 Safefree (cctx); 1621 Safefree (cctx);
932} 1622}
1623
1624/* wether this cctx should be destructed */
1625#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
933 1626
934static coro_cctx * 1627static coro_cctx *
935cctx_get (pTHX) 1628cctx_get (pTHX)
936{ 1629{
937 while (cctx_first) 1630 while (ecb_expect_true (cctx_first))
938 { 1631 {
939 coro_cctx *cctx = cctx_first; 1632 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next; 1633 cctx_first = cctx->next;
941 --cctx_idle; 1634 --cctx_idle;
942 1635
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1636 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
944 return cctx; 1637 return cctx;
945 1638
946 cctx_destroy (cctx); 1639 cctx_destroy (cctx);
947 } 1640 }
948 1641
949 return cctx_new (); 1642 return cctx_new_run ();
950} 1643}
951 1644
952static void 1645static void
953cctx_put (coro_cctx *cctx) 1646cctx_put (coro_cctx *cctx)
954{ 1647{
1648 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1649
955 /* free another cctx if overlimit */ 1650 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX) 1651 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
957 { 1652 {
958 coro_cctx *first = cctx_first; 1653 coro_cctx *first = cctx_first;
959 cctx_first = first->next; 1654 cctx_first = first->next;
960 --cctx_idle; 1655 --cctx_idle;
961 1656
… …
967 cctx_first = cctx; 1662 cctx_first = cctx;
968} 1663}
969 1664
970/** coroutine switching *****************************************************/ 1665/** coroutine switching *****************************************************/
971 1666
972static void NOINLINE 1667static void
973transfer_check (pTHX_ struct coro *prev, struct coro *next) 1668transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{ 1669{
975 if (prev != next) 1670 /* TODO: throwing up here is considered harmful */
1671
1672 if (ecb_expect_true (prev != next))
976 { 1673 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1674 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
978 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1675 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
979 1676
980 if (next->flags & CF_RUNNING) 1677 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
981 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
982
983 if (next->flags & CF_DESTROYED)
984 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1678 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
985 1679
1680#if !PERL_VERSION_ATLEAST (5,10,0)
986 if (PL_lex_state != LEX_NOTPARSING) 1681 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
987 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1682 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1683#endif
988 } 1684 }
989} 1685}
990 1686
991/* always use the TRANSFER macro */ 1687/* always use the TRANSFER macro */
992static void NOINLINE 1688static void ecb_noinline /* noinline so we have a fixed stackframe */
993transfer (pTHX_ struct coro *prev, struct coro *next) 1689transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
994{ 1690{
995 dSTACKLEVEL; 1691 dSTACKLEVEL;
996 1692
997 /* sometimes transfer is only called to set idle_sp */ 1693 /* sometimes transfer is only called to set idle_sp */
998 if (!next) 1694 if (ecb_expect_false (!prev))
999 { 1695 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1696 cctx_current->idle_sp = STACKLEVEL;
1001 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1697 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 }
1003 else if (prev != next)
1004 { 1698 }
1699 else if (ecb_expect_true (prev != next))
1700 {
1005 coro_cctx *prev__cctx; 1701 coro_cctx *cctx_prev;
1006 1702
1007 if (prev->flags & CF_NEW) 1703 if (ecb_expect_false (prev->flags & CF_NEW))
1008 { 1704 {
1009 /* create a new empty context */ 1705 /* create a new empty/source context */
1010 Newz (0, prev->cctx, 1, coro_cctx);
1011 prev->flags &= ~CF_NEW; 1706 prev->flags &= ~CF_NEW;
1012 prev->flags |= CF_RUNNING; 1707 prev->flags |= CF_RUNNING;
1013 } 1708 }
1014 1709
1015 prev->flags &= ~CF_RUNNING; 1710 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING; 1711 next->flags |= CF_RUNNING;
1017 1712
1018 LOCK; 1713 /* first get rid of the old state */
1714 save_perl (aTHX_ prev);
1019 1715
1020 if (next->flags & CF_NEW) 1716 if (ecb_expect_false (next->flags & CF_NEW))
1021 { 1717 {
1022 /* need to start coroutine */ 1718 /* need to start coroutine */
1023 next->flags &= ~CF_NEW; 1719 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */ 1720 /* setup coroutine call */
1027 coro_setup (aTHX_ next); 1721 init_perl (aTHX_ next);
1028 } 1722 }
1029 else 1723 else
1724 load_perl (aTHX_ next);
1725
1726 /* possibly untie and reuse the cctx */
1727 if (ecb_expect_true (
1728 cctx_current->idle_sp == STACKLEVEL
1729 && !(cctx_current->flags & CC_TRACE)
1730 && !force_cctx
1731 ))
1030 { 1732 {
1031 /* coroutine already started */ 1733 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1032 save_perl (aTHX_ prev); 1734 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1033 load_perl (aTHX_ next); 1735
1736 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1737 /* without this the next cctx_get might destroy the running cctx while still in use */
1738 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1739 if (ecb_expect_true (!next->cctx))
1740 next->cctx = cctx_get (aTHX);
1741
1742 cctx_put (cctx_current);
1034 } 1743 }
1744 else
1745 prev->cctx = cctx_current;
1035 1746
1036 prev__cctx = prev->cctx; 1747 ++next->usecount;
1037 1748
1038 /* possibly "free" the cctx */ 1749 cctx_prev = cctx_current;
1039 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1750 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1751
1752 next->cctx = 0;
1753
1754 if (ecb_expect_false (cctx_prev != cctx_current))
1040 { 1755 {
1041 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1756 cctx_prev->top_env = PL_top_env;
1042 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1757 PL_top_env = cctx_current->top_env;
1043 1758 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1044 prev->cctx = 0;
1045
1046 cctx_put (prev__cctx);
1047 } 1759 }
1048 1760
1049 ++next->usecount; 1761 transfer_tail (aTHX);
1050
1051 if (!next->cctx)
1052 next->cctx = cctx_get (aTHX);
1053
1054 if (prev__cctx != next->cctx)
1055 {
1056 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 }
1060
1061 free_coro_mortal (aTHX);
1062 UNLOCK;
1063 } 1762 }
1064} 1763}
1065 1764
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1765#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1072#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1766#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073 1767
1074/** high level stuff ********************************************************/ 1768/** high level stuff ********************************************************/
1075 1769
1770/* this function is actually Coro, not Coro::State, but we call it from here */
1771/* because it is convenient - but it hasn't been declared yet for that reason */
1076static int 1772static void
1773coro_call_on_destroy (pTHX_ struct coro *coro);
1774
1775static void
1077coro_state_destroy (pTHX_ struct coro *coro) 1776coro_state_destroy (pTHX_ struct coro *coro)
1078{ 1777{
1079 if (coro->flags & CF_DESTROYED) 1778 if (coro->flags & CF_ZOMBIE)
1080 return 0; 1779 return;
1081 1780
1781 slf_destroy (aTHX_ coro);
1782
1082 coro->flags |= CF_DESTROYED; 1783 coro->flags |= CF_ZOMBIE;
1083 1784
1084 if (coro->flags & CF_READY) 1785 if (coro->flags & CF_READY)
1085 { 1786 {
1086 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1787 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */ 1788 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready; 1789 --coro_nready;
1090 UNLOCK;
1091 } 1790 }
1092 else 1791 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1792 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1094
1095 if (coro->mainstack && coro->mainstack != main_mainstack)
1096 {
1097 struct coro temp;
1098
1099 if (coro->flags & CF_RUNNING)
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101
1102 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro);
1104
1105 coro_destroy (aTHX_ coro);
1106
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1108
1109 coro->mainstack = 0;
1110 }
1111
1112 cctx_destroy (coro->cctx);
1113 SvREFCNT_dec (coro->args);
1114 1793
1115 if (coro->next) coro->next->prev = coro->prev; 1794 if (coro->next) coro->next->prev = coro->prev;
1116 if (coro->prev) coro->prev->next = coro->next; 1795 if (coro->prev) coro->prev->next = coro->next;
1117 if (coro == coro_first) coro_first = coro->next; 1796 if (coro == coro_first) coro_first = coro->next;
1118 1797
1119 return 1; 1798 if (coro->mainstack
1799 && coro->mainstack != main_mainstack
1800 && coro->slot
1801 && !PL_dirty)
1802 destroy_perl (aTHX_ coro);
1803
1804 cctx_destroy (coro->cctx);
1805 SvREFCNT_dec (coro->startcv);
1806 SvREFCNT_dec (coro->args);
1807 SvREFCNT_dec (coro->swap_sv);
1808 SvREFCNT_dec (CORO_THROW);
1809
1810 coro_call_on_destroy (aTHX_ coro);
1811
1812 /* more destruction mayhem in coro_state_free */
1120} 1813}
1121 1814
1122static int 1815static int
1123coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1816coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1124{ 1817{
1125 struct coro *coro = (struct coro *)mg->mg_ptr; 1818 struct coro *coro = (struct coro *)mg->mg_ptr;
1126 mg->mg_ptr = 0; 1819 mg->mg_ptr = 0;
1127 1820
1128 coro->hv = 0;
1129
1130 if (--coro->refcnt < 0)
1131 {
1132 coro_state_destroy (aTHX_ coro); 1821 coro_state_destroy (aTHX_ coro);
1822 SvREFCNT_dec (coro->on_destroy);
1823 SvREFCNT_dec (coro->status);
1824
1133 Safefree (coro); 1825 Safefree (coro);
1134 }
1135 1826
1136 return 0; 1827 return 0;
1137} 1828}
1138 1829
1139static int 1830static int ecb_cold
1140coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1831coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1141{ 1832{
1142 struct coro *coro = (struct coro *)mg->mg_ptr; 1833 /* called when perl clones the current process the slow way (windows process emulation) */
1143 1834 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1144 ++coro->refcnt; 1835 mg->mg_ptr = 0;
1836 mg->mg_virtual = 0;
1145 1837
1146 return 0; 1838 return 0;
1147} 1839}
1148 1840
1149static MGVTBL coro_state_vtbl = { 1841static MGVTBL coro_state_vtbl = {
… …
1156# define MGf_DUP 0 1848# define MGf_DUP 0
1157#endif 1849#endif
1158}; 1850};
1159 1851
1160static void 1852static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1853prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{ 1854{
1163 ta->prev = SvSTATE (prev_sv); 1855 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv); 1856 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta); 1857 TRANSFER_CHECK (*ta);
1166} 1858}
1167 1859
1168static void 1860static void
1169api_transfer (SV *prev_sv, SV *next_sv) 1861api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1862{
1863 struct coro_transfer_args ta;
1864
1865 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1866 TRANSFER (ta, 1);
1867}
1868
1869/** Coro ********************************************************************/
1870
1871ecb_inline void
1872coro_enq (pTHX_ struct coro *coro)
1873{
1874 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1875
1876 SvREFCNT_inc_NN (coro->hv);
1877
1878 coro->next_ready = 0;
1879 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1880 ready [1] = coro;
1881}
1882
1883ecb_inline struct coro *
1884coro_deq (pTHX)
1885{
1886 int prio;
1887
1888 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1889 {
1890 struct coro **ready = coro_ready [prio];
1891
1892 if (ready [0])
1893 {
1894 struct coro *coro = ready [0];
1895 ready [0] = coro->next_ready;
1896 return coro;
1897 }
1898 }
1899
1900 return 0;
1901}
1902
1903static void
1904invoke_sv_ready_hook_helper (void)
1170{ 1905{
1171 dTHX; 1906 dTHX;
1172 struct transfer_args ta; 1907 dSP;
1173 1908
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1909 ENTER;
1175 TRANSFER (ta); 1910 SAVETMPS;
1176}
1177 1911
1178/** Coro ********************************************************************/ 1912 PUSHMARK (SP);
1913 PUTBACK;
1914 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1179 1915
1180static void 1916 FREETMPS;
1181coro_enq (pTHX_ SV *coro_sv) 1917 LEAVE;
1182{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1184}
1185
1186static SV *
1187coro_deq (pTHX_ int min_prio)
1188{
1189 int prio = PRIO_MAX - PRIO_MIN;
1190
1191 min_prio -= PRIO_MIN;
1192 if (min_prio < 0)
1193 min_prio = 0;
1194
1195 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1196 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]);
1198
1199 return 0;
1200} 1918}
1201 1919
1202static int 1920static int
1203api_ready (SV *coro_sv) 1921api_ready (pTHX_ SV *coro_sv)
1204{ 1922{
1205 dTHX;
1206 struct coro *coro;
1207
1208 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv);
1210
1211 coro = SvSTATE (coro_sv); 1923 struct coro *coro = SvSTATE (coro_sv);
1212 1924
1213 if (coro->flags & CF_READY) 1925 if (coro->flags & CF_READY)
1214 return 0; 1926 return 0;
1215 1927
1216 coro->flags |= CF_READY; 1928 coro->flags |= CF_READY;
1217 1929
1218 LOCK; 1930 coro_enq (aTHX_ coro);
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1931
1220 ++coro_nready; 1932 if (!coro_nready++)
1221 UNLOCK; 1933 if (coroapi.readyhook)
1934 coroapi.readyhook ();
1222 1935
1223 return 1; 1936 return 1;
1224} 1937}
1225 1938
1226static int 1939static int
1227api_is_ready (SV *coro_sv) 1940api_is_ready (pTHX_ SV *coro_sv)
1228{ 1941{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1942 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231} 1943}
1232 1944
1233static void 1945/* expects to own a reference to next->hv */
1946ecb_inline void
1234prepare_schedule (pTHX_ struct transfer_args *ta) 1947prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1235{ 1948{
1236 SV *prev_sv, *next_sv;
1237
1238 for (;;)
1239 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN);
1242
1243 /* nothing to schedule: call the idle handler */
1244 if (!next_sv)
1245 {
1246 dSP;
1247 UNLOCK;
1248
1249 ENTER;
1250 SAVETMPS;
1251
1252 PUSHMARK (SP);
1253 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1255
1256 FREETMPS;
1257 LEAVE;
1258 continue;
1259 }
1260
1261 ta->next = SvSTATE (next_sv);
1262
1263 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED)
1265 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */
1269 continue;
1270 }
1271
1272 --coro_nready;
1273 UNLOCK;
1274 break;
1275 }
1276
1277 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current); 1949 SV *prev_sv = SvRV (coro_current);
1950
1279 ta->prev = SvSTATE (prev_sv); 1951 ta->prev = SvSTATE_hv (prev_sv);
1952 ta->next = next;
1953
1280 TRANSFER_CHECK (*ta); 1954 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY); 1955
1282 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv); 1956 SvRV_set (coro_current, (SV *)next->hv);
1284 1957
1285 LOCK;
1286 free_coro_mortal (aTHX); 1958 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv; 1959 coro_mortal = prev_sv;
1288 UNLOCK;
1289} 1960}
1290 1961
1291static void 1962static void
1963prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1964{
1965 for (;;)
1966 {
1967 struct coro *next = coro_deq (aTHX);
1968
1969 if (ecb_expect_true (next))
1970 {
1971 /* cannot transfer to destroyed coros, skip and look for next */
1972 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1973 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1974 else
1975 {
1976 next->flags &= ~CF_READY;
1977 --coro_nready;
1978
1979 prepare_schedule_to (aTHX_ ta, next);
1980 break;
1981 }
1982 }
1983 else
1984 {
1985 /* nothing to schedule: call the idle handler */
1986 if (SvROK (sv_idle)
1987 && SvOBJECT (SvRV (sv_idle)))
1988 {
1989 if (SvRV (sv_idle) == SvRV (coro_current))
1990 {
1991 require_pv ("Carp");
1992
1993 {
1994 dSP;
1995
1996 ENTER;
1997 SAVETMPS;
1998
1999 PUSHMARK (SP);
2000 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2001 PUTBACK;
2002 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2003
2004 FREETMPS;
2005 LEAVE;
2006 }
2007 }
2008
2009 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2010 api_ready (aTHX_ SvRV (sv_idle));
2011 --coro_nready;
2012 }
2013 else
2014 {
2015 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2016 dSP;
2017
2018 ENTER;
2019 SAVETMPS;
2020
2021 PUSHMARK (SP);
2022 PUTBACK;
2023 call_sv (sv_idle, G_VOID | G_DISCARD);
2024
2025 FREETMPS;
2026 LEAVE;
2027 }
2028 }
2029 }
2030}
2031
2032ecb_inline void
1292prepare_cede (pTHX_ struct transfer_args *ta) 2033prepare_cede (pTHX_ struct coro_transfer_args *ta)
1293{ 2034{
1294 api_ready (coro_current); 2035 api_ready (aTHX_ coro_current);
1295 prepare_schedule (aTHX_ ta); 2036 prepare_schedule (aTHX_ ta);
1296} 2037}
1297 2038
2039ecb_inline void
2040prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2041{
2042 SV *prev = SvRV (coro_current);
2043
2044 if (coro_nready)
2045 {
2046 prepare_schedule (aTHX_ ta);
2047 api_ready (aTHX_ prev);
2048 }
2049 else
2050 prepare_nop (aTHX_ ta);
2051}
2052
2053static void
2054api_schedule (pTHX)
2055{
2056 struct coro_transfer_args ta;
2057
2058 prepare_schedule (aTHX_ &ta);
2059 TRANSFER (ta, 1);
2060}
2061
2062static void
2063api_schedule_to (pTHX_ SV *coro_sv)
2064{
2065 struct coro_transfer_args ta;
2066 struct coro *next = SvSTATE (coro_sv);
2067
2068 SvREFCNT_inc_NN (coro_sv);
2069 prepare_schedule_to (aTHX_ &ta, next);
2070}
2071
1298static int 2072static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta) 2073api_cede (pTHX)
1300{ 2074{
1301 if (coro_nready) 2075 struct coro_transfer_args ta;
1302 { 2076
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta); 2077 prepare_cede (aTHX_ &ta);
1305 api_ready (prev); 2078
2079 if (ecb_expect_true (ta.prev != ta.next))
2080 {
2081 TRANSFER (ta, 1);
1306 return 1; 2082 return 1;
1307 } 2083 }
1308 else 2084 else
1309 return 0; 2085 return 0;
1310} 2086}
1311 2087
1312static void
1313api_schedule (void)
1314{
1315 dTHX;
1316 struct transfer_args ta;
1317
1318 prepare_schedule (aTHX_ &ta);
1319 TRANSFER (ta);
1320}
1321
1322static int 2088static int
1323api_cede (void) 2089api_cede_notself (pTHX)
1324{ 2090{
1325 dTHX; 2091 if (coro_nready)
2092 {
1326 struct transfer_args ta; 2093 struct coro_transfer_args ta;
1327 2094
1328 prepare_cede (aTHX_ &ta); 2095 prepare_cede_notself (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta); 2096 TRANSFER (ta, 1);
1333 return 1; 2097 return 1;
1334 } 2098 }
1335 else 2099 else
1336 return 0; 2100 return 0;
1337} 2101}
1338 2102
1339static int 2103static void
1340api_cede_notself (void)
1341{
1342 dTHX;
1343 struct transfer_args ta;
1344
1345 if (prepare_cede_notself (aTHX_ &ta))
1346 {
1347 TRANSFER (ta);
1348 return 1;
1349 }
1350 else
1351 return 0;
1352}
1353
1354static void
1355api_trace (SV *coro_sv, int flags) 2104api_trace (pTHX_ SV *coro_sv, int flags)
1356{ 2105{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv); 2106 struct coro *coro = SvSTATE (coro_sv);
1359 2107
2108 if (coro->flags & CF_RUNNING)
2109 croak ("cannot enable tracing on a running coroutine, caught");
2110
1360 if (flags & CC_TRACE) 2111 if (flags & CC_TRACE)
1361 { 2112 {
1362 if (!coro->cctx) 2113 if (!coro->cctx)
1363 coro->cctx = cctx_new (); 2114 coro->cctx = cctx_new_run ();
1364 else if (!(coro->cctx->flags & CC_TRACE)) 2115 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack"); 2116 croak ("cannot enable tracing on coroutine with custom stack, caught");
1366 2117
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2118 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 } 2119 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2120 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 { 2121 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2122 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372 2123
1373 if (coro->flags & CF_RUNNING) 2124 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT; 2125 PL_runops = RUNOPS_DEFAULT;
1375 else 2126 else
1376 coro->runops = RUNOPS_DEFAULT; 2127 coro->slot->runops = RUNOPS_DEFAULT;
2128 }
2129}
2130
2131static void
2132coro_push_av (pTHX_ AV *av, I32 gimme_v)
2133{
2134 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2135 {
2136 dSP;
2137
2138 if (gimme_v == G_SCALAR)
2139 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2140 else
2141 {
2142 int i;
2143 EXTEND (SP, AvFILLp (av) + 1);
2144
2145 for (i = 0; i <= AvFILLp (av); ++i)
2146 PUSHs (AvARRAY (av)[i]);
2147 }
2148
2149 PUTBACK;
2150 }
2151}
2152
2153static void
2154coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2155{
2156 if (!coro->on_destroy)
2157 coro->on_destroy = newAV ();
2158
2159 av_push (coro->on_destroy, cb);
2160}
2161
2162static void
2163slf_destroy_join (pTHX_ struct CoroSLF *frame)
2164{
2165 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2166}
2167
2168static int
2169slf_check_join (pTHX_ struct CoroSLF *frame)
2170{
2171 struct coro *coro = (struct coro *)frame->data;
2172
2173 if (!coro->status)
2174 return 1;
2175
2176 frame->destroy = 0;
2177
2178 coro_push_av (aTHX_ coro->status, GIMME_V);
2179
2180 SvREFCNT_dec ((SV *)coro->hv);
2181
2182 return 0;
2183}
2184
2185static void
2186slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2187{
2188 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2189
2190 if (items > 1)
2191 croak ("join called with too many arguments");
2192
2193 if (coro->status)
2194 frame->prepare = prepare_nop;
2195 else
2196 {
2197 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2198 frame->prepare = prepare_schedule;
2199 }
2200
2201 frame->check = slf_check_join;
2202 frame->destroy = slf_destroy_join;
2203 frame->data = (void *)coro;
2204 SvREFCNT_inc (coro->hv);
2205}
2206
2207static void
2208coro_call_on_destroy (pTHX_ struct coro *coro)
2209{
2210 AV *od = coro->on_destroy;
2211
2212 if (!od)
2213 return;
2214
2215 coro->on_destroy = 0;
2216 sv_2mortal ((SV *)od);
2217
2218 while (AvFILLp (od) >= 0)
2219 {
2220 SV *cb = sv_2mortal (av_pop (od));
2221
2222 /* coro hv's (and only hv's at the moment) are supported as well */
2223 if (SvSTATEhv_p (aTHX_ cb))
2224 api_ready (aTHX_ cb);
2225 else
2226 {
2227 dSP; /* don't disturb outer sp */
2228 PUSHMARK (SP);
2229
2230 if (coro->status)
2231 {
2232 PUTBACK;
2233 coro_push_av (aTHX_ coro->status, G_ARRAY);
2234 SPAGAIN;
2235 }
2236
2237 PUTBACK;
2238 call_sv (cb, G_VOID | G_DISCARD);
2239 }
2240 }
2241}
2242
2243static void
2244coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2245{
2246 AV *av;
2247
2248 if (coro->status)
2249 {
2250 av = coro->status;
2251 av_clear (av);
2252 }
2253 else
2254 av = coro->status = newAV ();
2255
2256 /* items are actually not so common, so optimise for this case */
2257 if (items)
2258 {
2259 int i;
2260
2261 av_extend (av, items - 1);
2262
2263 for (i = 0; i < items; ++i)
2264 av_push (av, SvREFCNT_inc_NN (arg [i]));
2265 }
2266}
2267
2268static void
2269slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2270{
2271 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2272 api_ready (aTHX_ sv_manager);
2273
2274 frame->prepare = prepare_schedule;
2275 frame->check = slf_check_repeat;
2276
2277 /* as a minor optimisation, we could unwind all stacks here */
2278 /* but that puts extra pressure on pp_slf, and is not worth much */
2279 /*coro_unwind_stacks (aTHX);*/
2280}
2281
2282static void
2283slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2284{
2285 HV *coro_hv = (HV *)SvRV (coro_current);
2286
2287 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2288 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2289}
2290
2291static void
2292slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2293{
2294 HV *coro_hv;
2295 struct coro *coro;
2296
2297 if (items <= 0)
2298 croak ("Coro::cancel called without coro object,");
2299
2300 coro = SvSTATE (arg [0]);
2301 coro_hv = coro->hv;
2302
2303 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2304
2305 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2306 {
2307 /* coro currently busy cancelling something, so just notify it */
2308 coro->slf_frame.data = (void *)coro;
2309
2310 frame->prepare = prepare_nop;
2311 frame->check = slf_check_nop;
2312 }
2313 else if (coro_hv == (HV *)SvRV (coro_current))
2314 {
2315 /* cancelling the current coro is allowed, and equals terminate */
2316 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2317 }
2318 else
2319 {
2320 struct coro *self = SvSTATE_current;
2321
2322 if (!self)
2323 croak ("Coro::cancel called outside of thread content,");
2324
2325 /* otherwise we cancel directly, purely for speed reasons
2326 * unfortunately, this requires some magic trickery, as
2327 * somebody else could cancel us, so we have to fight the cancellation.
2328 * this is ugly, and hopefully fully worth the extra speed.
2329 * besides, I can't get the slow-but-safe version working...
2330 */
2331 slf_frame.data = 0;
2332 self->flags |= CF_NOCANCEL;
2333 coro_state_destroy (aTHX_ coro);
2334 self->flags &= ~CF_NOCANCEL;
2335
2336 if (slf_frame.data)
2337 {
2338 /* while we were busy we have been cancelled, so terminate */
2339 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2340 }
2341 else
2342 {
2343 frame->prepare = prepare_nop;
2344 frame->check = slf_check_nop;
2345 }
2346 }
2347}
2348
2349static int
2350slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2351{
2352 frame->prepare = 0;
2353 coro_unwind_stacks (aTHX);
2354
2355 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2356
2357 return 1;
2358}
2359
2360static int
2361safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2362{
2363 if (coro->cctx)
2364 croak ("coro inside C callback, unable to cancel at this time, caught");
2365
2366 if (coro->flags & CF_NEW)
2367 {
2368 coro_set_status (aTHX_ coro, arg, items);
2369 coro_state_destroy (aTHX_ coro);
2370 }
2371 else
2372 {
2373 if (!coro->slf_frame.prepare)
2374 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2375
2376 slf_destroy (aTHX_ coro);
2377
2378 coro_set_status (aTHX_ coro, arg, items);
2379 coro->slf_frame.prepare = prepare_nop;
2380 coro->slf_frame.check = slf_check_safe_cancel;
2381
2382 api_ready (aTHX_ (SV *)coro->hv);
2383 }
2384
2385 return 1;
2386}
2387
2388/*****************************************************************************/
2389/* async pool handler */
2390
2391static int
2392slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2393{
2394 HV *hv = (HV *)SvRV (coro_current);
2395 struct coro *coro = (struct coro *)frame->data;
2396
2397 if (!coro->invoke_cb)
2398 return 1; /* loop till we have invoke */
2399 else
2400 {
2401 hv_store (hv, "desc", sizeof ("desc") - 1,
2402 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2403
2404 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2405
2406 {
2407 dSP;
2408 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2409 PUTBACK;
1377 } 2410 }
2411
2412 SvREFCNT_dec (GvAV (PL_defgv));
2413 GvAV (PL_defgv) = coro->invoke_av;
2414 coro->invoke_av = 0;
2415
2416 return 0;
2417 }
1378} 2418}
2419
2420static void
2421slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2422{
2423 HV *hv = (HV *)SvRV (coro_current);
2424 struct coro *coro = SvSTATE_hv ((SV *)hv);
2425
2426 if (ecb_expect_true (coro->saved_deffh))
2427 {
2428 /* subsequent iteration */
2429 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2430 coro->saved_deffh = 0;
2431
2432 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2433 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2434 {
2435 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2436 return;
2437 }
2438 else
2439 {
2440 av_clear (GvAV (PL_defgv));
2441 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2442
2443 if (ecb_expect_false (coro->swap_sv))
2444 {
2445 swap_svs_leave (coro);
2446 SvREFCNT_dec_NN (coro->swap_sv);
2447 coro->swap_sv = 0;
2448 }
2449
2450 coro->prio = 0;
2451
2452 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2453 api_trace (aTHX_ coro_current, 0);
2454
2455 frame->prepare = prepare_schedule;
2456 av_push (av_async_pool, SvREFCNT_inc (hv));
2457 }
2458 }
2459 else
2460 {
2461 /* first iteration, simply fall through */
2462 frame->prepare = prepare_nop;
2463 }
2464
2465 frame->check = slf_check_pool_handler;
2466 frame->data = (void *)coro;
2467}
2468
2469/*****************************************************************************/
2470/* rouse callback */
2471
2472#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2473
2474static void
2475coro_rouse_callback (pTHX_ CV *cv)
2476{
2477 dXSARGS;
2478 SV *data = (SV *)S_GENSUB_ARG;
2479
2480 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2481 {
2482 /* first call, set args */
2483 SV *coro = SvRV (data);
2484 AV *av = newAV ();
2485
2486 SvRV_set (data, (SV *)av);
2487
2488 /* better take a full copy of the arguments */
2489 while (items--)
2490 av_store (av, items, newSVsv (ST (items)));
2491
2492 api_ready (aTHX_ coro);
2493 SvREFCNT_dec (coro);
2494 }
2495
2496 XSRETURN_EMPTY;
2497}
2498
2499static int
2500slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2501{
2502 SV *data = (SV *)frame->data;
2503
2504 if (CORO_THROW)
2505 return 0;
2506
2507 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2508 return 1;
2509
2510 /* now push all results on the stack */
2511 {
2512 dSP;
2513 AV *av = (AV *)SvRV (data);
2514 int i;
2515
2516 EXTEND (SP, AvFILLp (av) + 1);
2517 for (i = 0; i <= AvFILLp (av); ++i)
2518 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2519
2520 /* we have stolen the elements, so set length to zero and free */
2521 AvFILLp (av) = -1;
2522 av_undef (av);
2523
2524 PUTBACK;
2525 }
2526
2527 return 0;
2528}
2529
2530static void
2531slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2532{
2533 SV *cb;
2534
2535 if (items)
2536 cb = arg [0];
2537 else
2538 {
2539 struct coro *coro = SvSTATE_current;
2540
2541 if (!coro->rouse_cb)
2542 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2543
2544 cb = sv_2mortal (coro->rouse_cb);
2545 coro->rouse_cb = 0;
2546 }
2547
2548 if (!SvROK (cb)
2549 || SvTYPE (SvRV (cb)) != SVt_PVCV
2550 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2551 croak ("Coro::rouse_wait called with illegal callback argument,");
2552
2553 {
2554 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2555 SV *data = (SV *)S_GENSUB_ARG;
2556
2557 frame->data = (void *)data;
2558 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2559 frame->check = slf_check_rouse_wait;
2560 }
2561}
2562
2563static SV *
2564coro_new_rouse_cb (pTHX)
2565{
2566 HV *hv = (HV *)SvRV (coro_current);
2567 struct coro *coro = SvSTATE_hv (hv);
2568 SV *data = newRV_inc ((SV *)hv);
2569 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2570
2571 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2572 SvREFCNT_dec (data); /* magicext increases the refcount */
2573
2574 SvREFCNT_dec (coro->rouse_cb);
2575 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2576
2577 return cb;
2578}
2579
2580/*****************************************************************************/
2581/* schedule-like-function opcode (SLF) */
2582
2583static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2584static const CV *slf_cv;
2585static SV **slf_argv;
2586static int slf_argc, slf_arga; /* count, allocated */
2587static I32 slf_ax; /* top of stack, for restore */
2588
2589/* this restores the stack in the case we patched the entersub, to */
2590/* recreate the stack frame as perl will on following calls */
2591/* since entersub cleared the stack */
2592static OP *
2593pp_restore (pTHX)
2594{
2595 int i;
2596 SV **SP = PL_stack_base + slf_ax;
2597
2598 PUSHMARK (SP);
2599
2600 EXTEND (SP, slf_argc + 1);
2601
2602 for (i = 0; i < slf_argc; ++i)
2603 PUSHs (sv_2mortal (slf_argv [i]));
2604
2605 PUSHs ((SV *)CvGV (slf_cv));
2606
2607 RETURNOP (slf_restore.op_first);
2608}
2609
2610static void
2611slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2612{
2613 SV **arg = (SV **)slf_frame.data;
2614
2615 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2616}
2617
2618static void
2619slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2620{
2621 if (items != 2)
2622 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2623
2624 frame->prepare = slf_prepare_transfer;
2625 frame->check = slf_check_nop;
2626 frame->data = (void *)arg; /* let's hope it will stay valid */
2627}
2628
2629static void
2630slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2631{
2632 frame->prepare = prepare_schedule;
2633 frame->check = slf_check_nop;
2634}
2635
2636static void
2637slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2638{
2639 struct coro *next = (struct coro *)slf_frame.data;
2640
2641 SvREFCNT_inc_NN (next->hv);
2642 prepare_schedule_to (aTHX_ ta, next);
2643}
2644
2645static void
2646slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (!items)
2649 croak ("Coro::schedule_to expects a coroutine argument, caught");
2650
2651 frame->data = (void *)SvSTATE (arg [0]);
2652 frame->prepare = slf_prepare_schedule_to;
2653 frame->check = slf_check_nop;
2654}
2655
2656static void
2657slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2658{
2659 api_ready (aTHX_ SvRV (coro_current));
2660
2661 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2662}
2663
2664static void
2665slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 frame->prepare = prepare_cede;
2668 frame->check = slf_check_nop;
2669}
2670
2671static void
2672slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2673{
2674 frame->prepare = prepare_cede_notself;
2675 frame->check = slf_check_nop;
2676}
2677
2678/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2679static void
2680slf_destroy (pTHX_ struct coro *coro)
2681{
2682 struct CoroSLF frame = coro->slf_frame;
2683
2684 /*
2685 * The on_destroy below most likely is from an SLF call.
2686 * Since by definition the SLF call will not finish when we destroy
2687 * the coro, we will have to force-finish it here, otherwise
2688 * cleanup functions cannot call SLF functions.
2689 */
2690 coro->slf_frame.prepare = 0;
2691
2692 /* this callback is reserved for slf functions needing to do cleanup */
2693 if (frame.destroy && frame.prepare && !PL_dirty)
2694 frame.destroy (aTHX_ &frame);
2695}
2696
2697/*
2698 * these not obviously related functions are all rolled into one
2699 * function to increase chances that they all will call transfer with the same
2700 * stack offset
2701 * SLF stands for "schedule-like-function".
2702 */
2703static OP *
2704pp_slf (pTHX)
2705{
2706 I32 checkmark; /* mark SP to see how many elements check has pushed */
2707
2708 /* set up the slf frame, unless it has already been set-up */
2709 /* the latter happens when a new coro has been started */
2710 /* or when a new cctx was attached to an existing coroutine */
2711 if (ecb_expect_true (!slf_frame.prepare))
2712 {
2713 /* first iteration */
2714 dSP;
2715 SV **arg = PL_stack_base + TOPMARK + 1;
2716 int items = SP - arg; /* args without function object */
2717 SV *gv = *sp;
2718
2719 /* do a quick consistency check on the "function" object, and if it isn't */
2720 /* for us, divert to the real entersub */
2721 if (SvTYPE (gv) != SVt_PVGV
2722 || !GvCV (gv)
2723 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2724 return PL_ppaddr[OP_ENTERSUB](aTHX);
2725
2726 if (!(PL_op->op_flags & OPf_STACKED))
2727 {
2728 /* ampersand-form of call, use @_ instead of stack */
2729 AV *av = GvAV (PL_defgv);
2730 arg = AvARRAY (av);
2731 items = AvFILLp (av) + 1;
2732 }
2733
2734 /* now call the init function, which needs to set up slf_frame */
2735 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2736 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2737
2738 /* pop args */
2739 SP = PL_stack_base + POPMARK;
2740
2741 PUTBACK;
2742 }
2743
2744 /* now that we have a slf_frame, interpret it! */
2745 /* we use a callback system not to make the code needlessly */
2746 /* complicated, but so we can run multiple perl coros from one cctx */
2747
2748 do
2749 {
2750 struct coro_transfer_args ta;
2751
2752 slf_frame.prepare (aTHX_ &ta);
2753 TRANSFER (ta, 0);
2754
2755 checkmark = PL_stack_sp - PL_stack_base;
2756 }
2757 while (slf_frame.check (aTHX_ &slf_frame));
2758
2759 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2760
2761 /* exception handling */
2762 if (ecb_expect_false (CORO_THROW))
2763 {
2764 SV *exception = sv_2mortal (CORO_THROW);
2765
2766 CORO_THROW = 0;
2767 sv_setsv (ERRSV, exception);
2768 croak (0);
2769 }
2770
2771 /* return value handling - mostly like entersub */
2772 /* make sure we put something on the stack in scalar context */
2773 if (GIMME_V == G_SCALAR
2774 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2775 {
2776 dSP;
2777 SV **bot = PL_stack_base + checkmark;
2778
2779 if (sp == bot) /* too few, push undef */
2780 bot [1] = &PL_sv_undef;
2781 else /* too many, take last one */
2782 bot [1] = *sp;
2783
2784 SP = bot + 1;
2785
2786 PUTBACK;
2787 }
2788
2789 return NORMAL;
2790}
2791
2792static void
2793api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2794{
2795 int i;
2796 SV **arg = PL_stack_base + ax;
2797 int items = PL_stack_sp - arg + 1;
2798
2799 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2800
2801 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2802 && PL_op->op_ppaddr != pp_slf)
2803 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2804
2805 CvFLAGS (cv) |= CVf_SLF;
2806 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2807 slf_cv = cv;
2808
2809 /* we patch the op, and then re-run the whole call */
2810 /* we have to put the same argument on the stack for this to work */
2811 /* and this will be done by pp_restore */
2812 slf_restore.op_next = (OP *)&slf_restore;
2813 slf_restore.op_type = OP_CUSTOM;
2814 slf_restore.op_ppaddr = pp_restore;
2815 slf_restore.op_first = PL_op;
2816
2817 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2818
2819 if (PL_op->op_flags & OPf_STACKED)
2820 {
2821 if (items > slf_arga)
2822 {
2823 slf_arga = items;
2824 Safefree (slf_argv);
2825 New (0, slf_argv, slf_arga, SV *);
2826 }
2827
2828 slf_argc = items;
2829
2830 for (i = 0; i < items; ++i)
2831 slf_argv [i] = SvREFCNT_inc (arg [i]);
2832 }
2833 else
2834 slf_argc = 0;
2835
2836 PL_op->op_ppaddr = pp_slf;
2837 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2838
2839 PL_op = (OP *)&slf_restore;
2840}
2841
2842/*****************************************************************************/
2843/* dynamic wind */
2844
2845static void
2846on_enterleave_call (pTHX_ SV *cb)
2847{
2848 dSP;
2849
2850 PUSHSTACK;
2851
2852 PUSHMARK (SP);
2853 PUTBACK;
2854 call_sv (cb, G_VOID | G_DISCARD);
2855 SPAGAIN;
2856
2857 POPSTACK;
2858}
2859
2860static SV *
2861coro_avp_pop_and_free (pTHX_ AV **avp)
2862{
2863 AV *av = *avp;
2864 SV *res = av_pop (av);
2865
2866 if (AvFILLp (av) < 0)
2867 {
2868 *avp = 0;
2869 SvREFCNT_dec (av);
2870 }
2871
2872 return res;
2873}
2874
2875static void
2876coro_pop_on_enter (pTHX_ void *coro)
2877{
2878 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2879 SvREFCNT_dec (cb);
2880}
2881
2882static void
2883coro_pop_on_leave (pTHX_ void *coro)
2884{
2885 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2886 on_enterleave_call (aTHX_ sv_2mortal (cb));
2887}
2888
2889static void
2890enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2891{
2892 if (!hook)
2893 return;
2894
2895 if (!*avp)
2896 {
2897 *avp = newAV ();
2898 AvREAL_off (*avp);
2899 }
2900
2901 av_push (*avp, (SV *)hook);
2902 av_push (*avp, (SV *)arg);
2903}
2904
2905static void
2906enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2907{
2908 AV *av = *avp;
2909 int i;
2910
2911 if (!av)
2912 return;
2913
2914 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2915 if (AvARRAY (av)[i] == (SV *)hook)
2916 {
2917 if (execute)
2918 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2919
2920 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2921 av_pop (av);
2922 av_pop (av);
2923 break;
2924 }
2925
2926 if (AvFILLp (av) >= 0)
2927 {
2928 *avp = 0;
2929 SvREFCNT_dec_NN (av);
2930 }
2931}
2932
2933static void
2934api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2935{
2936 struct coro *coro = SvSTATE (coro_sv);
2937
2938 if (SvSTATE_current == coro)
2939 if (enter)
2940 enter (aTHX_ enter_arg);
2941
2942 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2943 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2944}
2945
2946static void
2947api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2948{
2949 struct coro *coro = SvSTATE (coro_sv);
2950
2951 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2952 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2953}
2954
2955static void
2956savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2957{
2958 struct coro *coro = SvSTATE_current;
2959
2960 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2961}
2962
2963static void
2964savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2965{
2966 struct coro *coro = SvSTATE_current;
2967
2968 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2969}
2970
2971static void
2972api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2973{
2974 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2975
2976 /* this ought to be much cheaper than malloc + a single destructor call */
2977 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2978 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2979}
2980
2981/*****************************************************************************/
2982/* PerlIO::cede */
2983
2984typedef struct
2985{
2986 PerlIOBuf base;
2987 NV next, every;
2988} PerlIOCede;
2989
2990static IV ecb_cold
2991PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2992{
2993 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2994
2995 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2996 self->next = nvtime () + self->every;
2997
2998 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2999}
3000
3001static SV * ecb_cold
3002PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3003{
3004 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3005
3006 return newSVnv (self->every);
3007}
3008
3009static IV
3010PerlIOCede_flush (pTHX_ PerlIO *f)
3011{
3012 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3013 double now = nvtime ();
3014
3015 if (now >= self->next)
3016 {
3017 api_cede (aTHX);
3018 self->next = now + self->every;
3019 }
3020
3021 return PerlIOBuf_flush (aTHX_ f);
3022}
3023
3024static PerlIO_funcs PerlIO_cede =
3025{
3026 sizeof(PerlIO_funcs),
3027 "cede",
3028 sizeof(PerlIOCede),
3029 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3030 PerlIOCede_pushed,
3031 PerlIOBuf_popped,
3032 PerlIOBuf_open,
3033 PerlIOBase_binmode,
3034 PerlIOCede_getarg,
3035 PerlIOBase_fileno,
3036 PerlIOBuf_dup,
3037 PerlIOBuf_read,
3038 PerlIOBuf_unread,
3039 PerlIOBuf_write,
3040 PerlIOBuf_seek,
3041 PerlIOBuf_tell,
3042 PerlIOBuf_close,
3043 PerlIOCede_flush,
3044 PerlIOBuf_fill,
3045 PerlIOBase_eof,
3046 PerlIOBase_error,
3047 PerlIOBase_clearerr,
3048 PerlIOBase_setlinebuf,
3049 PerlIOBuf_get_base,
3050 PerlIOBuf_bufsiz,
3051 PerlIOBuf_get_ptr,
3052 PerlIOBuf_get_cnt,
3053 PerlIOBuf_set_ptrcnt,
3054};
3055
3056/*****************************************************************************/
3057/* Coro::Semaphore & Coro::Signal */
3058
3059static SV *
3060coro_waitarray_new (pTHX_ int count)
3061{
3062 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3063 AV *av = newAV ();
3064 SV **ary;
3065
3066 /* unfortunately, building manually saves memory */
3067 Newx (ary, 2, SV *);
3068 AvALLOC (av) = ary;
3069#if PERL_VERSION_ATLEAST (5,10,0)
3070 AvARRAY (av) = ary;
3071#else
3072 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3073 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3074 SvPVX ((SV *)av) = (char *)ary;
3075#endif
3076 AvMAX (av) = 1;
3077 AvFILLp (av) = 0;
3078 ary [0] = newSViv (count);
3079
3080 return newRV_noinc ((SV *)av);
3081}
3082
3083/* semaphore */
3084
3085static void
3086coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3087{
3088 SV *count_sv = AvARRAY (av)[0];
3089 IV count = SvIVX (count_sv);
3090
3091 count += adjust;
3092 SvIVX (count_sv) = count;
3093
3094 /* now wake up as many waiters as are expected to lock */
3095 while (count > 0 && AvFILLp (av) > 0)
3096 {
3097 SV *cb;
3098
3099 /* swap first two elements so we can shift a waiter */
3100 AvARRAY (av)[0] = AvARRAY (av)[1];
3101 AvARRAY (av)[1] = count_sv;
3102 cb = av_shift (av);
3103
3104 if (SvOBJECT (cb))
3105 {
3106 api_ready (aTHX_ cb);
3107 --count;
3108 }
3109 else if (SvTYPE (cb) == SVt_PVCV)
3110 {
3111 dSP;
3112 PUSHMARK (SP);
3113 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3114 PUTBACK;
3115 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3116 }
3117
3118 SvREFCNT_dec_NN (cb);
3119 }
3120}
3121
3122static void
3123coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3124{
3125 /* call $sem->adjust (0) to possibly wake up some other waiters */
3126 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3127}
3128
3129static int
3130slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3131{
3132 AV *av = (AV *)frame->data;
3133 SV *count_sv = AvARRAY (av)[0];
3134 SV *coro_hv = SvRV (coro_current);
3135
3136 frame->destroy = 0;
3137
3138 /* if we are about to throw, don't actually acquire the lock, just throw */
3139 if (ecb_expect_false (CORO_THROW))
3140 {
3141 /* we still might be responsible for the semaphore, so wake up others */
3142 coro_semaphore_adjust (aTHX_ av, 0);
3143
3144 return 0;
3145 }
3146 else if (SvIVX (count_sv) > 0)
3147 {
3148 if (acquire)
3149 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3150 else
3151 coro_semaphore_adjust (aTHX_ av, 0);
3152
3153 return 0;
3154 }
3155 else
3156 {
3157 int i;
3158 /* if we were woken up but can't down, we look through the whole */
3159 /* waiters list and only add us if we aren't in there already */
3160 /* this avoids some degenerate memory usage cases */
3161 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3162 if (AvARRAY (av)[i] == coro_hv)
3163 return 1;
3164
3165 av_push (av, SvREFCNT_inc (coro_hv));
3166 return 1;
3167 }
3168}
3169
3170static int
3171slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3172{
3173 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3174}
3175
3176static int
3177slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3178{
3179 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3180}
3181
3182static void
3183slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3184{
3185 AV *av = (AV *)SvRV (arg [0]);
3186
3187 if (SvIVX (AvARRAY (av)[0]) > 0)
3188 {
3189 frame->data = (void *)av;
3190 frame->prepare = prepare_nop;
3191 }
3192 else
3193 {
3194 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3195
3196 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3197 frame->prepare = prepare_schedule;
3198 /* to avoid race conditions when a woken-up coro gets terminated */
3199 /* we arrange for a temporary on_destroy that calls adjust (0) */
3200 frame->destroy = coro_semaphore_destroy;
3201 }
3202}
3203
3204static void
3205slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3206{
3207 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3208 frame->check = slf_check_semaphore_down;
3209}
3210
3211static void
3212slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3213{
3214 if (items >= 2)
3215 {
3216 /* callback form */
3217 AV *av = (AV *)SvRV (arg [0]);
3218 SV *cb_cv = s_get_cv_croak (arg [1]);
3219
3220 av_push (av, SvREFCNT_inc_NN (cb_cv));
3221
3222 if (SvIVX (AvARRAY (av)[0]) > 0)
3223 coro_semaphore_adjust (aTHX_ av, 0);
3224
3225 frame->prepare = prepare_nop;
3226 frame->check = slf_check_nop;
3227 }
3228 else
3229 {
3230 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3231 frame->check = slf_check_semaphore_wait;
3232 }
3233}
3234
3235/* signal */
3236
3237static void
3238coro_signal_wake (pTHX_ AV *av, int count)
3239{
3240 SvIVX (AvARRAY (av)[0]) = 0;
3241
3242 /* now signal count waiters */
3243 while (count > 0 && AvFILLp (av) > 0)
3244 {
3245 SV *cb;
3246
3247 /* swap first two elements so we can shift a waiter */
3248 cb = AvARRAY (av)[0];
3249 AvARRAY (av)[0] = AvARRAY (av)[1];
3250 AvARRAY (av)[1] = cb;
3251
3252 cb = av_shift (av);
3253
3254 if (SvTYPE (cb) == SVt_PVCV)
3255 {
3256 dSP;
3257 PUSHMARK (SP);
3258 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3259 PUTBACK;
3260 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3261 }
3262 else
3263 {
3264 api_ready (aTHX_ cb);
3265 sv_setiv (cb, 0); /* signal waiter */
3266 }
3267
3268 SvREFCNT_dec_NN (cb);
3269
3270 --count;
3271 }
3272}
3273
3274static int
3275slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3276{
3277 /* if we are about to throw, also stop waiting */
3278 return SvROK ((SV *)frame->data) && !CORO_THROW;
3279}
3280
3281static void
3282slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3283{
3284 AV *av = (AV *)SvRV (arg [0]);
3285
3286 if (items >= 2)
3287 {
3288 SV *cb_cv = s_get_cv_croak (arg [1]);
3289 av_push (av, SvREFCNT_inc_NN (cb_cv));
3290
3291 if (SvIVX (AvARRAY (av)[0]))
3292 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3293
3294 frame->prepare = prepare_nop;
3295 frame->check = slf_check_nop;
3296 }
3297 else if (SvIVX (AvARRAY (av)[0]))
3298 {
3299 SvIVX (AvARRAY (av)[0]) = 0;
3300 frame->prepare = prepare_nop;
3301 frame->check = slf_check_nop;
3302 }
3303 else
3304 {
3305 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3306
3307 av_push (av, waiter);
3308
3309 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3310 frame->prepare = prepare_schedule;
3311 frame->check = slf_check_signal_wait;
3312 }
3313}
3314
3315/*****************************************************************************/
3316/* Coro::AIO */
3317
3318#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3319
3320/* helper storage struct */
3321struct io_state
3322{
3323 int errorno;
3324 I32 laststype; /* U16 in 5.10.0 */
3325 int laststatval;
3326 Stat_t statcache;
3327};
3328
3329static void
3330coro_aio_callback (pTHX_ CV *cv)
3331{
3332 dXSARGS;
3333 AV *state = (AV *)S_GENSUB_ARG;
3334 SV *coro = av_pop (state);
3335 SV *data_sv = newSV (sizeof (struct io_state));
3336
3337 av_extend (state, items - 1);
3338
3339 sv_upgrade (data_sv, SVt_PV);
3340 SvCUR_set (data_sv, sizeof (struct io_state));
3341 SvPOK_only (data_sv);
3342
3343 {
3344 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3345
3346 data->errorno = errno;
3347 data->laststype = PL_laststype;
3348 data->laststatval = PL_laststatval;
3349 data->statcache = PL_statcache;
3350 }
3351
3352 /* now build the result vector out of all the parameters and the data_sv */
3353 {
3354 int i;
3355
3356 for (i = 0; i < items; ++i)
3357 av_push (state, SvREFCNT_inc_NN (ST (i)));
3358 }
3359
3360 av_push (state, data_sv);
3361
3362 api_ready (aTHX_ coro);
3363 SvREFCNT_dec_NN (coro);
3364 SvREFCNT_dec_NN ((AV *)state);
3365}
3366
3367static int
3368slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3369{
3370 AV *state = (AV *)frame->data;
3371
3372 /* if we are about to throw, return early */
3373 /* this does not cancel the aio request, but at least */
3374 /* it quickly returns */
3375 if (CORO_THROW)
3376 return 0;
3377
3378 /* one element that is an RV? repeat! */
3379 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3380 return 1;
3381
3382 /* restore status */
3383 {
3384 SV *data_sv = av_pop (state);
3385 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3386
3387 errno = data->errorno;
3388 PL_laststype = data->laststype;
3389 PL_laststatval = data->laststatval;
3390 PL_statcache = data->statcache;
3391
3392 SvREFCNT_dec_NN (data_sv);
3393 }
3394
3395 /* push result values */
3396 {
3397 dSP;
3398 int i;
3399
3400 EXTEND (SP, AvFILLp (state) + 1);
3401 for (i = 0; i <= AvFILLp (state); ++i)
3402 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3403
3404 PUTBACK;
3405 }
3406
3407 return 0;
3408}
3409
3410static void
3411slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3412{
3413 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3414 SV *coro_hv = SvRV (coro_current);
3415 struct coro *coro = SvSTATE_hv (coro_hv);
3416
3417 /* put our coroutine id on the state arg */
3418 av_push (state, SvREFCNT_inc_NN (coro_hv));
3419
3420 /* first see whether we have a non-zero priority and set it as AIO prio */
3421 if (coro->prio)
3422 {
3423 dSP;
3424
3425 static SV *prio_cv;
3426 static SV *prio_sv;
3427
3428 if (ecb_expect_false (!prio_cv))
3429 {
3430 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3431 prio_sv = newSViv (0);
3432 }
3433
3434 PUSHMARK (SP);
3435 sv_setiv (prio_sv, coro->prio);
3436 XPUSHs (prio_sv);
3437
3438 PUTBACK;
3439 call_sv (prio_cv, G_VOID | G_DISCARD);
3440 }
3441
3442 /* now call the original request */
3443 {
3444 dSP;
3445 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3446 int i;
3447
3448 PUSHMARK (SP);
3449
3450 /* first push all args to the stack */
3451 EXTEND (SP, items + 1);
3452
3453 for (i = 0; i < items; ++i)
3454 PUSHs (arg [i]);
3455
3456 /* now push the callback closure */
3457 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3458
3459 /* now call the AIO function - we assume our request is uncancelable */
3460 PUTBACK;
3461 call_sv ((SV *)req, G_VOID | G_DISCARD);
3462 }
3463
3464 /* now that the request is going, we loop till we have a result */
3465 frame->data = (void *)state;
3466 frame->prepare = prepare_schedule;
3467 frame->check = slf_check_aio_req;
3468}
3469
3470static void
3471coro_aio_req_xs (pTHX_ CV *cv)
3472{
3473 dXSARGS;
3474
3475 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3476
3477 XSRETURN_EMPTY;
3478}
3479
3480/*****************************************************************************/
3481
3482#if CORO_CLONE
3483# include "clone.c"
3484#endif
3485
3486/*****************************************************************************/
3487
3488static SV *
3489coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3490{
3491 SV *coro_sv;
3492 struct coro *coro;
3493 MAGIC *mg;
3494 HV *hv;
3495 SV *cb;
3496 int i;
3497
3498 if (argc > 0)
3499 {
3500 cb = s_get_cv_croak (argv [0]);
3501
3502 if (!is_coro)
3503 {
3504 if (CvISXSUB (cb))
3505 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3506
3507 if (!CvROOT (cb))
3508 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3509 }
3510 }
3511
3512 Newz (0, coro, 1, struct coro);
3513 coro->args = newAV ();
3514 coro->flags = CF_NEW;
3515
3516 if (coro_first) coro_first->prev = coro;
3517 coro->next = coro_first;
3518 coro_first = coro;
3519
3520 coro->hv = hv = newHV ();
3521 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3522 mg->mg_flags |= MGf_DUP;
3523 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3524
3525 if (argc > 0)
3526 {
3527 av_extend (coro->args, argc + is_coro - 1);
3528
3529 if (is_coro)
3530 {
3531 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3532 cb = (SV *)cv_coro_run;
3533 }
3534
3535 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3536
3537 for (i = 1; i < argc; i++)
3538 av_push (coro->args, newSVsv (argv [i]));
3539 }
3540
3541 return coro_sv;
3542}
3543
3544#ifndef __cplusplus
3545ecb_cold XS(boot_Coro__State);
3546#endif
3547
3548#if CORO_JIT
3549
3550static void ecb_noinline ecb_cold
3551pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3552{
3553 dSP;
3554 AV *av = newAV ();
3555
3556 av_store (av, 3, newSVuv (d));
3557 av_store (av, 2, newSVuv (c));
3558 av_store (av, 1, newSVuv (b));
3559 av_store (av, 0, newSVuv (a));
3560
3561 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3562
3563 PUTBACK;
3564}
3565
3566static void ecb_noinline ecb_cold
3567jit_init (pTHX)
3568{
3569 dSP;
3570 SV *load, *save;
3571 char *map_base;
3572 char *load_ptr, *save_ptr;
3573 STRLEN load_len, save_len, map_len;
3574 int count;
3575
3576 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3577
3578 PUSHMARK (SP);
3579 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3580 #include "state.h"
3581 count = call_pv ("Coro::State::_jit", G_ARRAY);
3582 SPAGAIN;
3583
3584 save = POPs; save_ptr = SvPVbyte (save, save_len);
3585 load = POPs; load_ptr = SvPVbyte (load, load_len);
3586
3587 map_len = load_len + save_len + 16;
3588
3589 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3590
3591 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3592
3593 load_perl_slots = (load_save_perl_slots_type)map_base;
3594 memcpy (map_base, load_ptr, load_len);
3595
3596 map_base += (load_len + 15) & ~15;
3597
3598 save_perl_slots = (load_save_perl_slots_type)map_base;
3599 memcpy (map_base, save_ptr, save_len);
3600
3601 /* we are good citizens and try to make the page read-only, so the evil evil */
3602 /* hackers might have it a bit more difficult */
3603 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3604
3605 PUTBACK;
3606 eval_pv ("undef &Coro::State::_jit", 1);
3607}
3608
3609#endif
1379 3610
1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3611MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1381 3612
1382PROTOTYPES: DISABLE 3613PROTOTYPES: DISABLE
1383 3614
1384BOOT: 3615BOOT:
1385{ 3616{
3617#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3618#include "state.h"
1386#ifdef USE_ITHREADS 3619#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex); 3620# if CORO_PTHREAD
3621 coro_thx = PERL_GET_CONTEXT;
1388#endif 3622# endif
1389 BOOT_PAGESIZE; 3623#endif
3624 /* perl defines these to check for existance first, but why it doesn't */
3625 /* just create them one at init time is not clear to me, except for */
3626 /* programs trying to delete them, but... */
3627 /* anyway, we declare this as invalid and make sure they are initialised here */
3628 DEFSV;
3629 ERRSV;
1390 3630
3631 cctx_current = cctx_new_empty ();
3632
1391 irsgv = gv_fetchpv ("/", 1, SVt_PV); 3633 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3634 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3635
3636 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3637 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3638 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3639
3640 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3641 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1392 3642
1393 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3643 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1394 3644
1395 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3645 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1396 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3646 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1401 main_top_env = PL_top_env; 3651 main_top_env = PL_top_env;
1402 3652
1403 while (main_top_env->je_prev) 3653 while (main_top_env->je_prev)
1404 main_top_env = main_top_env->je_prev; 3654 main_top_env = main_top_env->je_prev;
1405 3655
3656 {
3657 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3658
3659 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3660 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3661
3662 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3663 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3664 }
3665
1406 coroapi.ver = CORO_API_VERSION; 3666 coroapi.ver = CORO_API_VERSION;
3667 coroapi.rev = CORO_API_REVISION;
3668
1407 coroapi.transfer = api_transfer; 3669 coroapi.transfer = api_transfer;
1408 3670
3671 coroapi.sv_state = SvSTATE_;
3672 coroapi.execute_slf = api_execute_slf;
3673 coroapi.prepare_nop = prepare_nop;
3674 coroapi.prepare_schedule = prepare_schedule;
3675 coroapi.prepare_cede = prepare_cede;
3676 coroapi.prepare_cede_notself = prepare_cede_notself;
3677
3678 time_init (aTHX);
3679
1409 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3680 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3681#if CORO_JIT
3682 PUTBACK;
3683 jit_init (aTHX);
3684 SPAGAIN;
3685#endif
1410} 3686}
1411 3687
1412SV * 3688SV *
1413new (char *klass, ...) 3689new (SV *klass, ...)
3690 ALIAS:
3691 Coro::new = 1
1414 CODE: 3692 CODE:
1415{ 3693 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1416 struct coro *coro;
1417 HV *hv;
1418 int i;
1419
1420 Newz (0, coro, 1, struct coro);
1421 coro->args = newAV ();
1422 coro->flags = CF_NEW;
1423
1424 if (coro_first) coro_first->prev = coro;
1425 coro->next = coro_first;
1426 coro_first = coro;
1427
1428 coro->hv = hv = newHV ();
1429 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1430 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1431
1432 for (i = 1; i < items; i++)
1433 av_push (coro->args, newSVsv (ST (i)));
1434}
1435 OUTPUT:
1436 RETVAL
1437
1438# these not obviously related functions are all rolled into the same xs
1439# function to increase chances that they all will call transfer with the same
1440# stack offset
1441void
1442_set_stacklevel (...)
1443 ALIAS:
1444 Coro::State::transfer = 1
1445 Coro::schedule = 2
1446 Coro::cede = 3
1447 Coro::cede_notself = 4
1448 CODE:
1449{
1450 struct transfer_args ta;
1451
1452 switch (ix)
1453 {
1454 case 0:
1455 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1456 ta.next = 0;
1457 break;
1458
1459 case 1:
1460 if (items != 2)
1461 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1462
1463 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1464 break;
1465
1466 case 2:
1467 prepare_schedule (aTHX_ &ta);
1468 break;
1469
1470 case 3:
1471 prepare_cede (aTHX_ &ta);
1472 break;
1473
1474 case 4:
1475 if (!prepare_cede_notself (aTHX_ &ta))
1476 XSRETURN_EMPTY;
1477
1478 break;
1479 }
1480
1481 BARRIER;
1482 TRANSFER (ta);
1483
1484 if (GIMME_V != G_VOID && ta.next != ta.prev)
1485 XSRETURN_YES;
1486}
1487
1488bool
1489_destroy (SV *coro_sv)
1490 CODE:
1491 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1492 OUTPUT: 3694 OUTPUT:
1493 RETVAL 3695 RETVAL
1494 3696
1495void 3697void
1496_exit (code) 3698transfer (...)
1497 int code
1498 PROTOTYPE: $ 3699 PROTOTYPE: $$
1499 CODE: 3700 CODE:
1500 _exit (code); 3701 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3702
3703SV *
3704clone (Coro::State coro)
3705 CODE:
3706{
3707#if CORO_CLONE
3708 struct coro *ncoro = coro_clone (aTHX_ coro);
3709 MAGIC *mg;
3710 /* TODO: too much duplication */
3711 ncoro->hv = newHV ();
3712 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3713 mg->mg_flags |= MGf_DUP;
3714 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3715#else
3716 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3717#endif
3718}
3719 OUTPUT:
3720 RETVAL
1501 3721
1502int 3722int
1503cctx_stacksize (int new_stacksize = 0) 3723cctx_stacksize (int new_stacksize = 0)
3724 PROTOTYPE: ;$
1504 CODE: 3725 CODE:
1505 RETVAL = coro_stacksize; 3726 RETVAL = cctx_stacksize;
1506 if (new_stacksize) 3727 if (new_stacksize)
3728 {
1507 coro_stacksize = new_stacksize; 3729 cctx_stacksize = new_stacksize;
3730 ++cctx_gen;
3731 }
1508 OUTPUT: 3732 OUTPUT:
1509 RETVAL 3733 RETVAL
1510 3734
1511int 3735int
3736cctx_max_idle (int max_idle = 0)
3737 PROTOTYPE: ;$
3738 CODE:
3739 RETVAL = cctx_max_idle;
3740 if (max_idle > 1)
3741 cctx_max_idle = max_idle;
3742 OUTPUT:
3743 RETVAL
3744
3745int
1512cctx_count () 3746cctx_count ()
3747 PROTOTYPE:
1513 CODE: 3748 CODE:
1514 RETVAL = cctx_count; 3749 RETVAL = cctx_count;
1515 OUTPUT: 3750 OUTPUT:
1516 RETVAL 3751 RETVAL
1517 3752
1518int 3753int
1519cctx_idle () 3754cctx_idle ()
3755 PROTOTYPE:
1520 CODE: 3756 CODE:
1521 RETVAL = cctx_idle; 3757 RETVAL = cctx_idle;
1522 OUTPUT: 3758 OUTPUT:
1523 RETVAL 3759 RETVAL
1524 3760
1525void 3761void
1526list () 3762list ()
3763 PROTOTYPE:
1527 PPCODE: 3764 PPCODE:
1528{ 3765{
1529 struct coro *coro; 3766 struct coro *coro;
1530 for (coro = coro_first; coro; coro = coro->next) 3767 for (coro = coro_first; coro; coro = coro->next)
1531 if (coro->hv) 3768 if (coro->hv)
1532 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3769 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1533} 3770}
1534 3771
… …
1536call (Coro::State coro, SV *coderef) 3773call (Coro::State coro, SV *coderef)
1537 ALIAS: 3774 ALIAS:
1538 eval = 1 3775 eval = 1
1539 CODE: 3776 CODE:
1540{ 3777{
1541 if (coro->mainstack) 3778 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1542 { 3779 {
1543 struct coro temp; 3780 struct coro *current = SvSTATE_current;
1544 Zero (&temp, 1, struct coro); 3781 struct CoroSLF slf_save;
1545 3782
1546 if (!(coro->flags & CF_RUNNING)) 3783 if (current != coro)
1547 { 3784 {
3785 PUTBACK;
1548 save_perl (aTHX_ &temp); 3786 save_perl (aTHX_ current);
1549 load_perl (aTHX_ coro); 3787 load_perl (aTHX_ coro);
3788 /* the coro is most likely in an active SLF call.
3789 * while not strictly required (the code we execute is
3790 * not allowed to call any SLF functions), it's cleaner
3791 * to reinitialise the slf_frame and restore it later.
3792 * This might one day allow us to actually do SLF calls
3793 * from code executed here.
3794 */
3795 slf_save = slf_frame;
3796 slf_frame.prepare = 0;
3797 SPAGAIN;
1550 } 3798 }
1551 3799
1552 { 3800 PUSHSTACK;
1553 dSP; 3801
1554 ENTER;
1555 SAVETMPS;
1556 PUSHMARK (SP); 3802 PUSHMARK (SP);
1557 PUTBACK; 3803 PUTBACK;
3804
1558 if (ix) 3805 if (ix)
1559 eval_sv (coderef, 0); 3806 eval_sv (coderef, 0);
1560 else 3807 else
1561 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3808 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3809
3810 POPSTACK;
1562 SPAGAIN; 3811 SPAGAIN;
1563 FREETMPS;
1564 LEAVE;
1565 PUTBACK;
1566 }
1567 3812
1568 if (!(coro->flags & CF_RUNNING)) 3813 if (current != coro)
1569 { 3814 {
3815 PUTBACK;
3816 slf_frame = slf_save;
1570 save_perl (aTHX_ coro); 3817 save_perl (aTHX_ coro);
1571 load_perl (aTHX_ &temp); 3818 load_perl (aTHX_ current);
3819 SPAGAIN;
1572 } 3820 }
1573 } 3821 }
1574} 3822}
1575 3823
1576SV * 3824SV *
… …
1578 PROTOTYPE: $ 3826 PROTOTYPE: $
1579 ALIAS: 3827 ALIAS:
1580 is_ready = CF_READY 3828 is_ready = CF_READY
1581 is_running = CF_RUNNING 3829 is_running = CF_RUNNING
1582 is_new = CF_NEW 3830 is_new = CF_NEW
1583 is_destroyed = CF_DESTROYED 3831 is_destroyed = CF_ZOMBIE
3832 is_zombie = CF_ZOMBIE
3833 is_suspended = CF_SUSPENDED
1584 CODE: 3834 CODE:
1585 RETVAL = boolSV (coro->flags & ix); 3835 RETVAL = boolSV (coro->flags & ix);
1586 OUTPUT: 3836 OUTPUT:
1587 RETVAL 3837 RETVAL
1588 3838
1589void 3839void
3840throw (SV *self, SV *exception = &PL_sv_undef)
3841 PROTOTYPE: $;$
3842 CODE:
3843{
3844 struct coro *coro = SvSTATE (self);
3845 struct coro *current = SvSTATE_current;
3846 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3847 SvREFCNT_dec (*exceptionp);
3848 SvGETMAGIC (exception);
3849 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3850
3851 api_ready (aTHX_ self);
3852}
3853
3854void
1590api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3855api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3856 PROTOTYPE: $;$
3857 C_ARGS: aTHX_ coro, flags
1591 3858
1592SV * 3859SV *
1593has_stack (Coro::State coro) 3860has_cctx (Coro::State coro)
1594 PROTOTYPE: $ 3861 PROTOTYPE: $
1595 CODE: 3862 CODE:
1596 RETVAL = boolSV (!!coro->cctx); 3863 /* maybe manage the running flag differently */
3864 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1597 OUTPUT: 3865 OUTPUT:
1598 RETVAL 3866 RETVAL
1599 3867
1600int 3868int
1601is_traced (Coro::State coro) 3869is_traced (Coro::State coro)
… …
1603 CODE: 3871 CODE:
1604 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1605 OUTPUT: 3873 OUTPUT:
1606 RETVAL 3874 RETVAL
1607 3875
1608IV 3876UV
1609rss (Coro::State coro) 3877rss (Coro::State coro)
1610 PROTOTYPE: $ 3878 PROTOTYPE: $
1611 ALIAS: 3879 ALIAS:
1612 usecount = 1 3880 usecount = 1
1613 CODE: 3881 CODE:
… …
1617 case 1: RETVAL = coro->usecount; break; 3885 case 1: RETVAL = coro->usecount; break;
1618 } 3886 }
1619 OUTPUT: 3887 OUTPUT:
1620 RETVAL 3888 RETVAL
1621 3889
3890void
3891force_cctx ()
3892 PROTOTYPE:
3893 CODE:
3894 cctx_current->idle_sp = 0;
3895
3896void
3897swap_defsv (Coro::State self)
3898 PROTOTYPE: $
3899 ALIAS:
3900 swap_defav = 1
3901 CODE:
3902 if (!self->slot)
3903 croak ("cannot swap state with coroutine that has no saved state,");
3904 else
3905 {
3906 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3907 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3908
3909 SV *tmp = *src; *src = *dst; *dst = tmp;
3910 }
3911
3912void
3913cancel (Coro::State self)
3914 CODE:
3915 coro_state_destroy (aTHX_ self);
3916
3917SV *
3918enable_times (int enabled = enable_times)
3919 CODE:
3920{
3921 RETVAL = boolSV (enable_times);
3922
3923 if (enabled != enable_times)
3924 {
3925 enable_times = enabled;
3926
3927 coro_times_update ();
3928 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3929 }
3930}
3931 OUTPUT:
3932 RETVAL
3933
3934void
3935times (Coro::State self)
3936 PPCODE:
3937{
3938 struct coro *current = SvSTATE (coro_current);
3939
3940 if (ecb_expect_false (current == self))
3941 {
3942 coro_times_update ();
3943 coro_times_add (SvSTATE (coro_current));
3944 }
3945
3946 EXTEND (SP, 2);
3947 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3948 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3949
3950 if (ecb_expect_false (current == self))
3951 coro_times_sub (SvSTATE (coro_current));
3952}
3953
3954void
3955swap_sv (Coro::State coro, SV *sva, SV *svb)
3956 CODE:
3957{
3958 struct coro *current = SvSTATE_current;
3959 AV *swap_sv;
3960 int i;
3961
3962 sva = SvRV (sva);
3963 svb = SvRV (svb);
3964
3965 if (current == coro)
3966 SWAP_SVS_LEAVE (current);
3967
3968 if (!coro->swap_sv)
3969 coro->swap_sv = newAV ();
3970
3971 swap_sv = coro->swap_sv;
3972
3973 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3974 {
3975 SV *a = AvARRAY (swap_sv)[i ];
3976 SV *b = AvARRAY (swap_sv)[i + 1];
3977
3978 if (a == sva && b == svb)
3979 {
3980 SvREFCNT_dec_NN (a);
3981 SvREFCNT_dec_NN (b);
3982
3983 for (; i <= AvFILLp (swap_sv) - 2; i++)
3984 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3985
3986 AvFILLp (swap_sv) -= 2;
3987
3988 goto removed;
3989 }
3990 }
3991
3992 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3993 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3994
3995 removed:
3996
3997 if (current == coro)
3998 SWAP_SVS_ENTER (current);
3999}
4000
1622 4001
1623MODULE = Coro::State PACKAGE = Coro 4002MODULE = Coro::State PACKAGE = Coro
1624 4003
1625BOOT: 4004BOOT:
1626{ 4005{
1627 int i; 4006 if (SVt_LAST > 32)
4007 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1628 4008
1629 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 4009 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1630 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 4010 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4011 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4012 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1631 av_async_pool = get_av ("Coro::async_pool", TRUE); 4013 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4014 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4015 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4016 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1632 4017
1633 coro_current = get_sv ("Coro::current", FALSE); 4018 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1634 SvREADONLY_on (coro_current); 4019 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4020 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4021 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1635 4022
1636 coro_stash = gv_stashpv ("Coro", TRUE); 4023 coro_stash = gv_stashpv ("Coro", TRUE);
1637 4024
1638 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4025 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1639 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4026 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1640 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4027 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1641 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4028 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1642 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4029 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1643 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4030 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1644
1645 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1646 coro_ready[i] = newAV ();
1647 4031
1648 { 4032 {
1649 SV *sv = perl_get_sv("Coro::API", 1); 4033 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1650 4034
1651 coroapi.schedule = api_schedule; 4035 coroapi.schedule = api_schedule;
4036 coroapi.schedule_to = api_schedule_to;
1652 coroapi.cede = api_cede; 4037 coroapi.cede = api_cede;
1653 coroapi.cede_notself = api_cede_notself; 4038 coroapi.cede_notself = api_cede_notself;
1654 coroapi.ready = api_ready; 4039 coroapi.ready = api_ready;
1655 coroapi.is_ready = api_is_ready; 4040 coroapi.is_ready = api_is_ready;
1656 coroapi.nready = &coro_nready; 4041 coroapi.nready = coro_nready;
1657 coroapi.current = coro_current; 4042 coroapi.current = coro_current;
1658 4043
4044 coroapi.enterleave_hook = api_enterleave_hook;
4045 coroapi.enterleave_unhook = api_enterleave_unhook;
4046 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4047
1659 GCoroAPI = &coroapi; 4048 /*GCoroAPI = &coroapi;*/
1660 sv_setiv (sv, (IV)&coroapi); 4049 sv_setiv (sv, (IV)&coroapi);
1661 SvREADONLY_on (sv); 4050 SvREADONLY_on (sv);
1662 } 4051 }
1663} 4052}
4053
4054SV *
4055async (...)
4056 PROTOTYPE: &@
4057 CODE:
4058 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4059 api_ready (aTHX_ RETVAL);
4060 OUTPUT:
4061 RETVAL
4062
4063void
4064_destroy (Coro::State coro)
4065 CODE:
4066 /* used by the manager thread */
4067 coro_state_destroy (aTHX_ coro);
4068
4069void
4070on_destroy (Coro::State coro, SV *cb)
4071 CODE:
4072 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4073
4074void
4075join (...)
4076 CODE:
4077 CORO_EXECUTE_SLF_XS (slf_init_join);
4078
4079void
4080terminate (...)
4081 CODE:
4082 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4083
4084void
4085cancel (...)
4086 CODE:
4087 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4088
4089int
4090safe_cancel (Coro::State self, ...)
4091 C_ARGS: aTHX_ self, &ST (1), items - 1
4092
4093void
4094schedule (...)
4095 CODE:
4096 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4097
4098void
4099schedule_to (...)
4100 CODE:
4101 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4102
4103void
4104cede_to (...)
4105 CODE:
4106 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4107
4108void
4109cede (...)
4110 CODE:
4111 CORO_EXECUTE_SLF_XS (slf_init_cede);
4112
4113void
4114cede_notself (...)
4115 CODE:
4116 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1664 4117
1665void 4118void
1666_set_current (SV *current) 4119_set_current (SV *current)
1667 PROTOTYPE: $ 4120 PROTOTYPE: $
1668 CODE: 4121 CODE:
1669 SvREFCNT_dec (SvRV (coro_current)); 4122 SvREFCNT_dec_NN (SvRV (coro_current));
1670 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4123 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4124
4125void
4126_set_readyhook (SV *hook)
4127 PROTOTYPE: $
4128 CODE:
4129 SvREFCNT_dec (coro_readyhook);
4130 SvGETMAGIC (hook);
4131 if (SvOK (hook))
4132 {
4133 coro_readyhook = newSVsv (hook);
4134 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4135 }
4136 else
4137 {
4138 coro_readyhook = 0;
4139 CORO_READYHOOK = 0;
4140 }
1671 4141
1672int 4142int
1673prio (Coro::State coro, int newprio = 0) 4143prio (Coro::State coro, int newprio = 0)
4144 PROTOTYPE: $;$
1674 ALIAS: 4145 ALIAS:
1675 nice = 1 4146 nice = 1
1676 CODE: 4147 CODE:
1677{ 4148{
1678 RETVAL = coro->prio; 4149 RETVAL = coro->prio;
… …
1680 if (items > 1) 4151 if (items > 1)
1681 { 4152 {
1682 if (ix) 4153 if (ix)
1683 newprio = coro->prio - newprio; 4154 newprio = coro->prio - newprio;
1684 4155
1685 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4156 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1686 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4157 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1687 4158
1688 coro->prio = newprio; 4159 coro->prio = newprio;
1689 } 4160 }
1690} 4161}
1691 OUTPUT: 4162 OUTPUT:
… …
1693 4164
1694SV * 4165SV *
1695ready (SV *self) 4166ready (SV *self)
1696 PROTOTYPE: $ 4167 PROTOTYPE: $
1697 CODE: 4168 CODE:
1698 RETVAL = boolSV (api_ready (self)); 4169 RETVAL = boolSV (api_ready (aTHX_ self));
1699 OUTPUT: 4170 OUTPUT:
1700 RETVAL 4171 RETVAL
1701 4172
1702int 4173int
1703nready (...) 4174nready (...)
… …
1705 CODE: 4176 CODE:
1706 RETVAL = coro_nready; 4177 RETVAL = coro_nready;
1707 OUTPUT: 4178 OUTPUT:
1708 RETVAL 4179 RETVAL
1709 4180
1710# for async_pool speedup
1711void 4181void
1712_pool_1 (SV *cb) 4182suspend (Coro::State self)
4183 PROTOTYPE: $
1713 CODE: 4184 CODE:
1714{ 4185 self->flags |= CF_SUSPENDED;
1715 struct coro *coro = SvSTATE (coro_current);
1716 HV *hv = (HV *)SvRV (coro_current);
1717 AV *defav = GvAV (PL_defgv);
1718 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1719 AV *invoke_av;
1720 int i, len;
1721 4186
1722 if (!invoke) 4187void
1723 croak ("\3terminate\2\n"); 4188resume (Coro::State self)
4189 PROTOTYPE: $
4190 CODE:
4191 self->flags &= ~CF_SUSPENDED;
1724 4192
1725 SvREFCNT_dec (coro->saved_deffh); 4193void
1726 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 4194_pool_handler (...)
4195 CODE:
4196 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1727 4197
1728 hv_store (hv, "desc", sizeof ("desc") - 1, 4198void
1729 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 4199async_pool (SV *cv, ...)
4200 PROTOTYPE: &@
4201 PPCODE:
4202{
4203 HV *hv = (HV *)av_pop (av_async_pool);
4204 AV *av = newAV ();
4205 SV *cb = ST (0);
4206 int i;
1730 4207
1731 invoke_av = (AV *)SvRV (invoke); 4208 av_extend (av, items - 2);
1732 len = av_len (invoke_av); 4209 for (i = 1; i < items; ++i)
4210 av_push (av, SvREFCNT_inc_NN (ST (i)));
1733 4211
1734 sv_setsv (cb, AvARRAY (invoke_av)[0]); 4212 if ((SV *)hv == &PL_sv_undef)
1735
1736 if (len > 0)
1737 { 4213 {
1738 av_fill (defav, len - 1); 4214 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1739 for (i = 0; i < len; ++i) 4215 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1740 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4216 SvREFCNT_dec_NN (sv);
1741 } 4217 }
1742 4218
4219 {
4220 struct coro *coro = SvSTATE_hv (hv);
4221
4222 assert (!coro->invoke_cb);
4223 assert (!coro->invoke_av);
4224 coro->invoke_cb = SvREFCNT_inc (cb);
4225 coro->invoke_av = av;
4226 }
4227
4228 api_ready (aTHX_ (SV *)hv);
4229
4230 if (GIMME_V != G_VOID)
4231 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4232 else
1743 SvREFCNT_dec (invoke); 4233 SvREFCNT_dec_NN (hv);
1744} 4234}
1745 4235
1746void 4236SV *
1747_pool_2 (SV *cb) 4237rouse_cb ()
4238 PROTOTYPE:
1748 CODE: 4239 CODE:
1749{ 4240 RETVAL = coro_new_rouse_cb (aTHX);
1750 struct coro *coro = SvSTATE (coro_current);
1751
1752 sv_setsv (cb, &PL_sv_undef);
1753
1754 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1755 coro->saved_deffh = 0;
1756
1757 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1758 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1759 croak ("\3terminate\2\n");
1760
1761 av_clear (GvAV (PL_defgv));
1762 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1763 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1764
1765 coro->prio = 0;
1766
1767 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1768 api_trace (coro_current, 0);
1769
1770 av_push (av_async_pool, newSVsv (coro_current));
1771}
1772
1773
1774MODULE = Coro::State PACKAGE = Coro::AIO
1775
1776SV *
1777_get_state ()
1778 CODE:
1779{
1780 struct io_state *data;
1781
1782 RETVAL = newSV (sizeof (struct io_state));
1783 data = (struct io_state *)SvPVX (RETVAL);
1784 SvCUR_set (RETVAL, sizeof (struct io_state));
1785 SvPOK_only (RETVAL);
1786
1787 data->errorno = errno;
1788 data->laststype = PL_laststype;
1789 data->laststatval = PL_laststatval;
1790 data->statcache = PL_statcache;
1791}
1792 OUTPUT: 4241 OUTPUT:
1793 RETVAL 4242 RETVAL
1794 4243
1795void 4244void
1796_set_state (char *data_) 4245rouse_wait (...)
4246 PROTOTYPE: ;$
4247 PPCODE:
4248 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4249
4250void
4251on_enter (SV *block)
4252 ALIAS:
4253 on_leave = 1
1797 PROTOTYPE: $ 4254 PROTOTYPE: &
1798 CODE: 4255 CODE:
1799{ 4256{
1800 struct io_state *data = (void *)data_; 4257 struct coro *coro = SvSTATE_current;
4258 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1801 4259
1802 errno = data->errorno; 4260 block = s_get_cv_croak (block);
1803 PL_laststype = data->laststype;
1804 PL_laststatval = data->laststatval;
1805 PL_statcache = data->statcache;
1806}
1807 4261
4262 if (!*avp)
4263 *avp = newAV ();
4264
4265 av_push (*avp, SvREFCNT_inc (block));
4266
4267 if (!ix)
4268 on_enterleave_call (aTHX_ block);
4269
4270 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4271 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4272 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4273}
4274
4275
4276MODULE = Coro::State PACKAGE = PerlIO::cede
4277
4278BOOT:
4279 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4280
4281
4282MODULE = Coro::State PACKAGE = Coro::Semaphore
4283
4284SV *
4285new (SV *klass, SV *count = 0)
4286 CODE:
4287{
4288 int semcnt = 1;
4289
4290 if (count)
4291 {
4292 SvGETMAGIC (count);
4293
4294 if (SvOK (count))
4295 semcnt = SvIV (count);
4296 }
4297
4298 RETVAL = sv_bless (
4299 coro_waitarray_new (aTHX_ semcnt),
4300 GvSTASH (CvGV (cv))
4301 );
4302}
4303 OUTPUT:
4304 RETVAL
4305
4306# helper for Coro::Channel and others
4307SV *
4308_alloc (int count)
4309 CODE:
4310 RETVAL = coro_waitarray_new (aTHX_ count);
4311 OUTPUT:
4312 RETVAL
4313
4314SV *
4315count (SV *self)
4316 CODE:
4317 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4318 OUTPUT:
4319 RETVAL
4320
4321void
4322up (SV *self)
4323 CODE:
4324 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4325
4326void
4327adjust (SV *self, int adjust)
4328 CODE:
4329 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4330
4331void
4332down (...)
4333 CODE:
4334 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4335
4336void
4337wait (...)
4338 CODE:
4339 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4340
4341void
4342try (SV *self)
4343 PPCODE:
4344{
4345 AV *av = (AV *)SvRV (self);
4346 SV *count_sv = AvARRAY (av)[0];
4347 IV count = SvIVX (count_sv);
4348
4349 if (count > 0)
4350 {
4351 --count;
4352 SvIVX (count_sv) = count;
4353 XSRETURN_YES;
4354 }
4355 else
4356 XSRETURN_NO;
4357}
4358
4359void
4360waiters (SV *self)
4361 PPCODE:
4362{
4363 AV *av = (AV *)SvRV (self);
4364 int wcount = AvFILLp (av) + 1 - 1;
4365
4366 if (GIMME_V == G_SCALAR)
4367 XPUSHs (sv_2mortal (newSViv (wcount)));
4368 else
4369 {
4370 int i;
4371 EXTEND (SP, wcount);
4372 for (i = 1; i <= wcount; ++i)
4373 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4374 }
4375}
4376
4377MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4378
4379void
4380_may_delete (SV *sem, int count, unsigned int extra_refs)
4381 PPCODE:
4382{
4383 AV *av = (AV *)SvRV (sem);
4384
4385 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4386 && AvFILLp (av) == 0 /* no waiters, just count */
4387 && SvIV (AvARRAY (av)[0]) == count)
4388 XSRETURN_YES;
4389
4390 XSRETURN_NO;
4391}
4392
4393MODULE = Coro::State PACKAGE = Coro::Signal
4394
4395SV *
4396new (SV *klass)
4397 CODE:
4398 RETVAL = sv_bless (
4399 coro_waitarray_new (aTHX_ 0),
4400 GvSTASH (CvGV (cv))
4401 );
4402 OUTPUT:
4403 RETVAL
4404
4405void
4406wait (...)
4407 CODE:
4408 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4409
4410void
4411broadcast (SV *self)
4412 CODE:
4413{
4414 AV *av = (AV *)SvRV (self);
4415 coro_signal_wake (aTHX_ av, AvFILLp (av));
4416}
4417
4418void
4419send (SV *self)
4420 CODE:
4421{
4422 AV *av = (AV *)SvRV (self);
4423
4424 if (AvFILLp (av))
4425 coro_signal_wake (aTHX_ av, 1);
4426 else
4427 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4428}
4429
4430IV
4431awaited (SV *self)
4432 CODE:
4433 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4434 OUTPUT:
4435 RETVAL
4436
4437
4438MODULE = Coro::State PACKAGE = Coro::AnyEvent
4439
4440BOOT:
4441 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4442
4443void
4444_schedule (...)
4445 CODE:
4446{
4447 static int incede;
4448
4449 api_cede_notself (aTHX);
4450
4451 ++incede;
4452 while (coro_nready >= incede && api_cede (aTHX))
4453 ;
4454
4455 sv_setsv (sv_activity, &PL_sv_undef);
4456 if (coro_nready >= incede)
4457 {
4458 PUSHMARK (SP);
4459 PUTBACK;
4460 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4461 }
4462
4463 --incede;
4464}
4465
4466
4467MODULE = Coro::State PACKAGE = Coro::AIO
4468
4469void
4470_register (char *target, char *proto, SV *req)
4471 CODE:
4472{
4473 SV *req_cv = s_get_cv_croak (req);
4474 /* newXSproto doesn't return the CV on 5.8 */
4475 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4476 sv_setpv ((SV *)slf_cv, proto);
4477 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4478}
4479
4480MODULE = Coro::State PACKAGE = Coro::Select
4481
4482void
4483patch_pp_sselect ()
4484 CODE:
4485 if (!coro_old_pp_sselect)
4486 {
4487 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4488 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4489 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4490 }
4491
4492void
4493unpatch_pp_sselect ()
4494 CODE:
4495 if (coro_old_pp_sselect)
4496 {
4497 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4498 coro_old_pp_sselect = 0;
4499 }
4500
4501MODULE = Coro::State PACKAGE = Coro::Util
4502
4503void
4504_exit (int code)
4505 CODE:
4506 _exit (code);
4507
4508NV
4509time ()
4510 CODE:
4511 RETVAL = nvtime (aTHX);
4512 OUTPUT:
4513 RETVAL
4514
4515NV
4516gettimeofday ()
4517 PPCODE:
4518{
4519 UV tv [2];
4520 u2time (aTHX_ tv);
4521 EXTEND (SP, 2);
4522 PUSHs (sv_2mortal (newSVuv (tv [0])));
4523 PUSHs (sv_2mortal (newSVuv (tv [1])));
4524}
4525

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