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Comparing Coro/Coro/State.xs (file contents):
Revision 1.210 by root, Wed Oct 10 03:24:40 2007 UTC vs.
Revision 1.429 by root, Fri Dec 7 14:21:09 2012 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
11 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
12#include <stdio.h> 22#include <stdio.h>
13#include <errno.h> 23#include <errno.h>
14#include <assert.h> 24#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
16 25
17#ifdef HAVE_MMAP 26#ifndef SVs_PADSTALE
18# include <unistd.h> 27# define SVs_PADSTALE 0
19# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS
21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
23# else
24# undef HAVE_MMAP
25# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
26# endif 38# endif
27# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
28# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
29# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
31static long pagesize; 43# define PadMAX AvFILLp
32# else 44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
33# define BOOT_PAGESIZE (void)0
34# endif 45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
35#else 53#else
36# define PAGESIZE 0 54# include <inttypes.h> /* most portable stdint.h */
37# define BOOT_PAGESIZE (void)0
38#endif 55#endif
39 56
40#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif
46
47/* the maximum number of idle cctx that will be pooled */ 57/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 58static int cctx_max_idle = 4;
49 59
50#define PERL_VERSION_ATLEAST(a,b,c) \ 60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
51 (PERL_REVISION > (a) \ 61# define HAS_SCOPESTACK_NAME 1
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.7 */
78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD
92#endif
93
94#ifndef CORO_STACKGUARD
95# define CORO_STACKGUARD 0
96#endif 62#endif
97 63
98/* prefer perl internal functions over our own? */ 64/* prefer perl internal functions over our own? */
99#ifndef CORO_PREFER_PERL_FUNCTIONS 65#ifndef CORO_PREFER_PERL_FUNCTIONS
100# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 67#endif
102 68
103/* The next macros try to return the current stack pointer, in an as 69/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 70 * portable way as possible. */
105#define dSTACKLEVEL volatile char stacklevel
106#define STACKLEVEL ((void *)&stacklevel)
107
108#define IN_DESTRUCT (PL_main_cv == Nullcv)
109
110#if __GNUC__ >= 3 71#if __GNUC__ >= 4
111# define attribute(x) __attribute__(x) 72# define dSTACKLEVEL int stacklevel_dummy
112# define BARRIER __asm__ __volatile__ ("" : : : "memory") 73# define STACKLEVEL __builtin_frame_address (0)
113# define expect(expr,value) __builtin_expect ((expr),(value))
114#else 74#else
115# define attribute(x) 75# define dSTACKLEVEL volatile void *stacklevel
116# define BARRIER 76# define STACKLEVEL ((void *)&stacklevel)
117# define expect(expr,value) (expr)
118#endif 77#endif
119 78
120#define expect_false(expr) expect ((expr) != 0, 0) 79#define IN_DESTRUCT PL_dirty
121#define expect_true(expr) expect ((expr) != 0, 1)
122
123#define NOINLINE attribute ((noinline))
124 80
125#include "CoroAPI.h" 81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
126 83
127#ifdef USE_ITHREADS 84#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 85# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 86static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 87# endif
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 88#endif
135 89
136#define strpair(const) const, sizeof (const) - 1 90#ifdef __linux
91# include <time.h> /* for timespec */
92# include <syscall.h> /* for SYS_* */
93# ifdef SYS_clock_gettime
94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
95# define CORO_CLOCK_MONOTONIC 1
96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
97# endif
98#endif
137 99
138/* helper storage struct for Coro::AIO */ 100static double (*nvtime)(); /* so why doesn't it take void? */
139struct io_state 101static void (*u2time)(pTHX_ UV ret[2]);
140{
141 int errorno;
142 I32 laststype;
143 int laststatval;
144 Stat_t statcache;
145};
146 102
103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
107
108static U32 cctx_gen;
147static size_t coro_stacksize = CORO_STACKSIZE; 109static size_t cctx_stacksize = CORO_STACKSIZE;
148static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
149static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
150static JMPENV *main_top_env; 112static JMPENV *main_top_env;
151static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
152static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
153 119
154static GV *irsgv; /* $/ */ 120static GV *irsgv; /* $/ */
155static GV *stdoutgv; /* *STDOUT */ 121static GV *stdoutgv; /* *STDOUT */
156 122static SV *rv_diehook;
123static SV *rv_warnhook;
157static HV *hv_sig; /* %SIG */ 124static HV *hv_sig; /* %SIG */
158static SV *sv_diehook;
159static SV *sv_warnhook;
160 125
161/* async_pool helper stuff */ 126/* async_pool helper stuff */
162static SV *sv_pool_rss; 127static SV *sv_pool_rss;
163static SV *sv_pool_size; 128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
164static AV *av_async_pool; 130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
165 133
166static struct coro_cctx *cctx_first[3]; /* index by GIMME_V type, void, scalar, array */ 134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
142
143static struct coro_cctx *cctx_first;
167static int cctx_count, cctx_idle[3]; 144static int cctx_count, cctx_idle;
168 145
169enum { 146enum
147{
170 CC_MAPPED = 0x01, 148 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */ 149 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04, 150 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */ 151 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */ 152 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176}; 154};
177 155
178/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
179typedef struct coro_cctx { 157typedef struct coro_cctx
158{
180 struct coro_cctx *next; 159 struct coro_cctx *next;
181 160
182 /* the stack */ 161 /* the stack */
183 void *sptr; 162 struct coro_stack stack;
184 size_t ssize;
185 163
186 /* cpu state */ 164 /* cpu state */
187 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
188 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
189 JMPENV *top_env; 169 JMPENV *top_env;
190 coro_context cctx; 170 coro_context cctx;
191 171
172 U32 gen;
192#if CORO_USE_VALGRIND 173#if CORO_USE_VALGRIND
193 int valgrind_id; 174 int valgrind_id;
194#endif 175#endif
195 unsigned char flags; 176 unsigned char flags;
196} coro_cctx; 177} coro_cctx;
197 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
198enum { 185enum
186{
199 CF_RUNNING = 0x0001, /* coroutine is running */ 187 CF_RUNNING = 0x0001, /* coroutine is running */
200 CF_READY = 0x0002, /* coroutine is ready */ 188 CF_READY = 0x0002, /* coroutine is ready */
201 CF_NEW = 0x0004, /* has never been switched to */ 189 CF_NEW = 0x0004, /* has never been switched to */
202 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
203}; 193};
204 194
205/* the structure where most of the perl state is stored, overlaid on the cxstack */ 195/* the structure where most of the perl state is stored, overlaid on the cxstack */
206typedef struct { 196typedef struct
207 SV *defsv; 197{
208 AV *defav;
209 SV *errsv;
210 SV *irsgv;
211#define VAR(name,type) type name; 198 #define VARx(name,expr,type) type name;
212# include "state.h" 199 #include "state.h"
213#undef VAR
214} perl_slots; 200} perl_slots;
215 201
202/* how many context stack entries do we need for perl_slots */
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217 204
218/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
219struct coro { 206struct coro
207{
220 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
221 coro_cctx *cctx; 209 coro_cctx *cctx;
222 int gimme;
223 210
224 /* process data */ 211 /* ready queue */
212 struct coro *next_ready;
213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
225 AV *mainstack; 216 AV *mainstack;
226 perl_slots *slot; /* basically the saved sp */ 217 perl_slots *slot; /* basically the saved sp */
227 218
219 CV *startcv; /* the CV to execute */
228 AV *args; /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
229 int refcnt; /* coroutines are refcounted, yes */
230 int flags; /* CF_ flags */ 221 int flags; /* CF_ flags */
231 HV *hv; /* the perl hash associated with this coro, if any */ 222 HV *hv; /* the perl hash associated with this coro, if any */
232 223
233 /* statistics */ 224 /* statistics */
234 int usecount; /* number of transfers to this coro */ 225 int usecount; /* number of transfers to this coro */
235 226
236 /* coro process data */ 227 /* coro process data */
237 int prio; 228 int prio;
238 SV *throw; /* exception to be thrown */ 229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
239 233
240 /* async_pool */ 234 /* async_pool */
241 SV *saved_deffh; 235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
242 248
243 /* linked list */ 249 /* linked list */
244 struct coro *next, *prev; 250 struct coro *next, *prev;
245}; 251};
246 252
247typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
248typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
249 255
256/* the following variables are effectively part of the perl context */
257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
250/** Coro ********************************************************************/ 261/** Coro ********************************************************************/
251 262
252#define PRIO_MAX 3 263#define CORO_PRIO_MAX 3
253#define PRIO_HIGH 1 264#define CORO_PRIO_HIGH 1
254#define PRIO_NORMAL 0 265#define CORO_PRIO_NORMAL 0
255#define PRIO_LOW -1 266#define CORO_PRIO_LOW -1
256#define PRIO_IDLE -3 267#define CORO_PRIO_IDLE -3
257#define PRIO_MIN -4 268#define CORO_PRIO_MIN -4
258 269
259/* for Coro.pm */ 270/* for Coro.pm */
260static SV *coro_current; 271static SV *coro_current;
261static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 272static SV *coro_readyhook;
262static int coro_nready; 273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
263static struct coro *coro_first; 275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if __x86_64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
264 372
265/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
266 374
267static SV * 375static SV * ecb_noinline
268coro_get_sv (const char *name, int create) 376coro_get_sv (pTHX_ const char *name, int create)
269{ 377{
270#if PERL_VERSION_ATLEAST (5,9,0) 378#if PERL_VERSION_ATLEAST (5,10,0)
271 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
272 get_sv (name, create); 380 get_sv (name, create);
273#endif 381#endif
274 return get_sv (name, create); 382 return get_sv (name, create);
275} 383}
276 384
277static AV * 385static AV * ecb_noinline
278coro_get_av (const char *name, int create) 386coro_get_av (pTHX_ const char *name, int create)
279{ 387{
280#if PERL_VERSION_ATLEAST (5,9,0) 388#if PERL_VERSION_ATLEAST (5,10,0)
281 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
282 get_av (name, create); 390 get_av (name, create);
283#endif 391#endif
284 return get_av (name, create); 392 return get_av (name, create);
285} 393}
286 394
287static HV * 395static HV * ecb_noinline
288coro_get_hv (const char *name, int create) 396coro_get_hv (pTHX_ const char *name, int create)
289{ 397{
290#if PERL_VERSION_ATLEAST (5,9,0) 398#if PERL_VERSION_ATLEAST (5,10,0)
291 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
292 get_hv (name, create); 400 get_hv (name, create);
293#endif 401#endif
294 return get_hv (name, create); 402 return get_hv (name, create);
295} 403}
296 404
297static AV * 405ecb_inline void
406coro_times_update (void)
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428ecb_inline void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440ecb_inline void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
298coro_clone_padlist (pTHX_ CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
299{ 512{
300 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
301 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET const off = PadlistMAX (padlist) + 1;
302 517
303 newpadlist = newAV (); 518 newPADLIST(newpadlist);
519#if !PERL_VERSION_ATLEAST(5,15,3)
520 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
304 AvREAL_off (newpadlist); 521 AvREAL_off (newpadlist);
522#endif
305#if PERL_VERSION_ATLEAST (5,9,0) 523#if PERL_VERSION_ATLEAST (5,10,0)
306 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 524 Perl_pad_push (aTHX_ padlist, off);
307#else 525#else
308 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 526 Perl_pad_push (aTHX_ padlist, off, 1);
309#endif 527#endif
310 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 528 newpad = PadlistARRAY (padlist)[off];
311 --AvFILLp (padlist); 529 PadlistMAX (padlist) = off - 1;
312 530
313 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 531 /* Already extended to 2 elements by newPADLIST. */
314 av_store (newpadlist, 1, (SV *)newpad); 532 PadlistMAX (newpadlist) = 1;
533 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
534 PadlistARRAY (newpadlist)[1] = newpad;
315 535
316 return newpadlist; 536 return newpadlist;
317} 537}
318 538
319static void 539ecb_inline void
320free_padlist (pTHX_ AV *padlist) 540free_padlist (pTHX_ PADLIST *padlist)
321{ 541{
322 /* may be during global destruction */ 542 /* may be during global destruction */
323 if (SvREFCNT (padlist)) 543 if (!IN_DESTRUCT)
324 { 544 {
325 I32 i = AvFILLp (padlist); 545 I32 i = PadlistMAX (padlist);
326 while (i >= 0) 546
547 while (i > 0) /* special-case index 0 */
327 { 548 {
328 SV **svp = av_fetch (padlist, i--, FALSE); 549 /* we try to be extra-careful here */
329 if (svp) 550 PAD *pad = PadlistARRAY (padlist)[i--];
330 { 551 I32 j = PadMAX (pad);
331 SV *sv;
332 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
333 SvREFCNT_dec (sv);
334 552
553 while (j >= 0)
554 SvREFCNT_dec (PadARRAY (pad)[j--]);
555
556 PadMAX (pad) = -1;
335 SvREFCNT_dec (*svp); 557 SvREFCNT_dec (pad);
336 }
337 } 558 }
338 559
560 SvREFCNT_dec (PadlistNAMES (padlist));
561
562#ifdef NEWPADAPI
563 Safefree (PadlistARRAY (padlist));
564 Safefree (padlist);
565#else
566 AvFILLp (padlist) = -1;
567 AvREAL_off (padlist);
339 SvREFCNT_dec ((SV*)padlist); 568 SvREFCNT_dec ((SV*)padlist);
569#endif
340 } 570 }
341} 571}
342 572
343static int 573static int
344coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
345{ 575{
346 AV *padlist; 576 PADLIST *padlist;
347 AV *av = (AV *)mg->mg_obj; 577 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
578 size_t len = *(size_t *)mg->mg_ptr;
348 579
349 /* casting is fun. */ 580 /* perl manages to free our internal AV and _then_ call us */
350 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 581 if (IN_DESTRUCT)
582 return 0;
583
584 while (len--)
351 free_padlist (aTHX_ padlist); 585 free_padlist (aTHX_ padlists[len]);
352
353 SvREFCNT_dec (av);
354 586
355 return 0; 587 return 0;
356} 588}
357 589
358#define PERL_MAGIC_coro PERL_MAGIC_ext 590static MGVTBL coro_cv_vtbl = {
359 591 0, 0, 0, 0,
360static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 592 coro_cv_free
361 593};
362#define CORO_MAGIC(cv) \
363 SvMAGIC (cv) \
364 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
365 ? SvMAGIC (cv) \
366 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
367 : 0
368
369static struct coro *
370SvSTATE_ (pTHX_ SV *coro)
371{
372 HV *stash;
373 MAGIC *mg;
374
375 if (SvROK (coro))
376 coro = SvRV (coro);
377
378 if (expect_false (SvTYPE (coro) != SVt_PVHV))
379 croak ("Coro::State object required");
380
381 stash = SvSTASH (coro);
382 if (expect_false (stash != coro_stash && stash != coro_state_stash))
383 {
384 /* very slow, but rare, check */
385 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
386 croak ("Coro::State object required");
387 }
388
389 mg = CORO_MAGIC (coro);
390 return (struct coro *)mg->mg_ptr;
391}
392
393#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
394 594
395/* the next two functions merely cache the padlists */ 595/* the next two functions merely cache the padlists */
396static void 596ecb_inline void
397get_padlist (pTHX_ CV *cv) 597get_padlist (pTHX_ CV *cv)
398{ 598{
399 MAGIC *mg = CORO_MAGIC (cv); 599 MAGIC *mg = CORO_MAGIC_cv (cv);
400 AV *av; 600 size_t *lenp;
401 601
402 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 602 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
403 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 603 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
404 else 604 else
405 { 605 {
406#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
407 /* this is probably cleaner, but also slower? */ 607 /* this is probably cleaner? but also slower! */
608 /* in practise, it seems to be less stable */
408 CV *cp = Perl_cv_clone (cv); 609 CV *cp = Perl_cv_clone (aTHX_ cv);
409 CvPADLIST (cv) = CvPADLIST (cp); 610 CvPADLIST (cv) = CvPADLIST (cp);
410 CvPADLIST (cp) = 0; 611 CvPADLIST (cp) = 0;
411 SvREFCNT_dec (cp); 612 SvREFCNT_dec (cp);
412#else 613#else
413 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 614 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
414#endif 615#endif
415 } 616 }
416} 617}
417 618
418static void 619ecb_inline void
419put_padlist (pTHX_ CV *cv) 620put_padlist (pTHX_ CV *cv)
420{ 621{
421 MAGIC *mg = CORO_MAGIC (cv); 622 MAGIC *mg = CORO_MAGIC_cv (cv);
422 AV *av;
423 623
424 if (expect_false (!mg)) 624 if (ecb_expect_false (!mg))
425 {
426 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
427 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
428 mg->mg_virtual = &vtbl_coro;
429 mg->mg_obj = (SV *)newAV ();
430 } 625 {
626 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
627 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
628 mg->mg_len = 1; /* so mg_free frees mg_ptr */
629 }
630 else
631 Renew (mg->mg_ptr,
632 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
633 char);
431 634
432 av = (AV *)mg->mg_obj; 635 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
433
434 if (expect_false (AvFILLp (av) >= AvMAX (av)))
435 av_extend (av, AvMAX (av) + 1);
436
437 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
438} 636}
439 637
440/** load & save, init *******************************************************/ 638/** load & save, init *******************************************************/
639
640ecb_inline void
641swap_sv (SV *a, SV *b)
642{
643 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
644 SV tmp;
645
646 /* swap sv_any */
647 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
648
649 /* swap sv_flags */
650 SvFLAGS (&tmp) = SvFLAGS (a);
651 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
652 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
653
654#if PERL_VERSION_ATLEAST (5,10,0)
655 /* perl 5.10 and later complicates this _quite_ a bit, but it also
656 * is much faster, so no quarrels here. alternatively, we could
657 * sv_upgrade to avoid this.
658 */
659 {
660 /* swap sv_u */
661 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
662
663 /* if SvANY points to the head, we need to adjust the pointers,
664 * as the pointer for a still points to b, and maybe vice versa.
665 */
666 #define svany_in_head(type) \
667 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
668
669 if (svany_in_head (SvTYPE (a)))
670 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
671
672 if (svany_in_head (SvTYPE (b)))
673 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
674 }
675#endif
676}
677
678/* swap sv heads, at least logically */
679static void
680swap_svs (pTHX_ Coro__State c)
681{
682 int i;
683
684 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
685 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
686}
687
688#define SWAP_SVS(coro) \
689 if (ecb_expect_false ((coro)->swap_sv)) \
690 swap_svs (aTHX_ (coro))
691
692static void
693on_enterleave_call (pTHX_ SV *cb);
441 694
442static void 695static void
443load_perl (pTHX_ Coro__State c) 696load_perl (pTHX_ Coro__State c)
444{ 697{
445 perl_slots *slot = c->slot; 698 perl_slots *slot = c->slot;
446 c->slot = 0; 699 c->slot = 0;
447 700
448 PL_mainstack = c->mainstack; 701 PL_mainstack = c->mainstack;
449 702
450 GvSV (PL_defgv) = slot->defsv; 703#if CORO_JIT
451 GvAV (PL_defgv) = slot->defav; 704 load_perl_slots (slot);
452 GvSV (PL_errgv) = slot->errsv; 705#else
453 GvSV (irsgv) = slot->irsgv;
454
455 #define VAR(name,type) PL_ ## name = slot->name; 706 #define VARx(name,expr,type) expr = slot->name;
456 # include "state.h" 707 #include "state.h"
457 #undef VAR 708#endif
458
459 /*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
460 /*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
461 709
462 { 710 {
463 dSP; 711 dSP;
464 712
465 CV *cv; 713 CV *cv;
466 714
467 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
468 while (expect_true (cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
469 { 717 {
470 put_padlist (aTHX_ cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
471 CvDEPTH (cv) = PTR2IV (POPs); 719 CvDEPTH (cv) = PTR2IV (POPs);
472 CvPADLIST (cv) = (AV *)POPs; 720 CvPADLIST (cv) = (PADLIST *)POPs;
473 } 721 }
474 722
475 PUTBACK; 723 PUTBACK;
476 } 724 }
725
726 slf_frame = c->slf_frame;
727 CORO_THROW = c->except;
728
729 if (ecb_expect_false (enable_times))
730 {
731 if (ecb_expect_false (!times_valid))
732 coro_times_update ();
733
734 coro_times_sub (c);
735 }
736
737 if (ecb_expect_false (c->on_enter))
738 {
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
742 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
743 }
744
745 SWAP_SVS (c);
477} 746}
478 747
479static void 748static void
480save_perl (pTHX_ Coro__State c) 749save_perl (pTHX_ Coro__State c)
481{ 750{
751 SWAP_SVS (c);
752
753 if (ecb_expect_false (c->on_leave))
754 {
755 int i;
756
757 for (i = AvFILLp (c->on_leave); i >= 0; --i)
758 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
759 }
760
761 times_valid = 0;
762
763 if (ecb_expect_false (enable_times))
764 {
765 coro_times_update (); times_valid = 1;
766 coro_times_add (c);
767 }
768
769 c->except = CORO_THROW;
770 c->slf_frame = slf_frame;
771
482 { 772 {
483 dSP; 773 dSP;
484 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
485 PERL_CONTEXT *ccstk = cxstack; 775 PERL_CONTEXT *ccstk = cxstack;
486 PERL_SI *top_si = PL_curstackinfo; 776 PERL_SI *top_si = PL_curstackinfo;
… …
492 782
493 XPUSHs (Nullsv); 783 XPUSHs (Nullsv);
494 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
495 for (;;) 785 for (;;)
496 { 786 {
497 while (expect_true (cxix >= 0)) 787 while (ecb_expect_true (cxix >= 0))
498 { 788 {
499 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
500 790
501 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
502 { 792 {
503 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
504 794
505 if (expect_true (CvDEPTH (cv))) 795 if (ecb_expect_true (CvDEPTH (cv)))
506 { 796 {
507 EXTEND (SP, 3); 797 EXTEND (SP, 3);
508 PUSHs ((SV *)CvPADLIST (cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
509 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
510 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
511 801
512 CvDEPTH (cv) = 0; 802 CvDEPTH (cv) = 0;
513 get_padlist (aTHX_ cv); 803 get_padlist (aTHX_ cv);
514 } 804 }
515 } 805 }
516 } 806 }
517 807
518 if (expect_true (top_si->si_type == PERLSI_MAIN)) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
519 break; 809 break;
520 810
521 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
522 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
523 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
… …
525 815
526 PUTBACK; 816 PUTBACK;
527 } 817 }
528 818
529 /* allocate some space on the context stack for our purposes */ 819 /* allocate some space on the context stack for our purposes */
530 /* we manually unroll here, as usually 2 slots is enough */ 820 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
531 if (SLOT_COUNT >= 1) CXINC;
532 if (SLOT_COUNT >= 2) CXINC;
533 if (SLOT_COUNT >= 3) CXINC;
534 { 821 {
535 int i; 822 unsigned int i;
823
536 for (i = 3; i < SLOT_COUNT; ++i) 824 for (i = 0; i < SLOT_COUNT; ++i)
537 CXINC; 825 CXINC;
538 } 826
539 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 827 cxstack_ix -= SLOT_COUNT; /* undo allocation */
828 }
540 829
541 c->mainstack = PL_mainstack; 830 c->mainstack = PL_mainstack;
542 831
543 { 832 {
544 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 833 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
545 834
546 slot->defav = GvAV (PL_defgv); 835#if CORO_JIT
547 slot->defsv = DEFSV; 836 save_perl_slots (slot);
548 slot->errsv = ERRSV; 837#else
549 slot->irsgv = GvSV (irsgv);
550
551 #define VAR(name,type) slot->name = PL_ ## name; 838 #define VARx(name,expr,type) slot->name = expr;
552 # include "state.h" 839 #include "state.h"
553 #undef VAR 840#endif
554 } 841 }
555} 842}
556 843
557/* 844/*
558 * allocate various perl stacks. This is an exact copy 845 * allocate various perl stacks. This is almost an exact copy
559 * of perl.c:init_stacks, except that it uses less memory 846 * of perl.c:init_stacks, except that it uses less memory
560 * on the (sometimes correct) assumption that coroutines do 847 * on the (sometimes correct) assumption that coroutines do
561 * not usually need a lot of stackspace. 848 * not usually need a lot of stackspace.
562 */ 849 */
563#if CORO_PREFER_PERL_FUNCTIONS 850#if CORO_PREFER_PERL_FUNCTIONS
564# define coro_init_stacks init_stacks 851# define coro_init_stacks(thx) init_stacks ()
565#else 852#else
566static void 853static void
567coro_init_stacks (pTHX) 854coro_init_stacks (pTHX)
568{ 855{
569 PL_curstackinfo = new_stackinfo(32, 8); 856 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
570 PL_curstackinfo->si_type = PERLSI_MAIN; 857 PL_curstackinfo->si_type = PERLSI_MAIN;
571 PL_curstack = PL_curstackinfo->si_stack; 858 PL_curstack = PL_curstackinfo->si_stack;
572 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 859 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
573 860
574 PL_stack_base = AvARRAY(PL_curstack); 861 PL_stack_base = AvARRAY(PL_curstack);
… …
589#endif 876#endif
590 877
591 New(54,PL_scopestack,8,I32); 878 New(54,PL_scopestack,8,I32);
592 PL_scopestack_ix = 0; 879 PL_scopestack_ix = 0;
593 PL_scopestack_max = 8; 880 PL_scopestack_max = 8;
881#if HAS_SCOPESTACK_NAME
882 New(54,PL_scopestack_name,8,const char*);
883#endif
594 884
595 New(54,PL_savestack,24,ANY); 885 New(54,PL_savestack,24,ANY);
596 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
597 PL_savestack_max = 24; 887 PL_savestack_max = 24;
598 888
599#if !PERL_VERSION_ATLEAST (5,9,0) 889#if !PERL_VERSION_ATLEAST (5,10,0)
600 New(54,PL_retstack,4,OP*); 890 New(54,PL_retstack,4,OP*);
601 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
602 PL_retstack_max = 4; 892 PL_retstack_max = 4;
603#endif 893#endif
604} 894}
… …
606 896
607/* 897/*
608 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
609 */ 899 */
610static void 900static void
611coro_destroy_stacks (pTHX) 901coro_destruct_stacks (pTHX)
612{ 902{
613 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
614 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
615 905
616 while (PL_curstackinfo) 906 while (PL_curstackinfo)
… …
626 } 916 }
627 917
628 Safefree (PL_tmps_stack); 918 Safefree (PL_tmps_stack);
629 Safefree (PL_markstack); 919 Safefree (PL_markstack);
630 Safefree (PL_scopestack); 920 Safefree (PL_scopestack);
921#if HAS_SCOPESTACK_NAME
922 Safefree (PL_scopestack_name);
923#endif
631 Safefree (PL_savestack); 924 Safefree (PL_savestack);
632#if !PERL_VERSION_ATLEAST (5,9,0) 925#if !PERL_VERSION_ATLEAST (5,10,0)
633 Safefree (PL_retstack); 926 Safefree (PL_retstack);
634#endif 927#endif
635} 928}
636 929
930#define CORO_RSS \
931 rss += sizeof (SYM (curstackinfo)); \
932 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
933 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
934 rss += SYM (tmps_max) * sizeof (SV *); \
935 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
936 rss += SYM (scopestack_max) * sizeof (I32); \
937 rss += SYM (savestack_max) * sizeof (ANY);
938
637static size_t 939static size_t
638coro_rss (pTHX_ struct coro *coro) 940coro_rss (pTHX_ struct coro *coro)
639{ 941{
640 size_t rss = sizeof (*coro); 942 size_t rss = sizeof (*coro);
641 943
642 if (coro->mainstack) 944 if (coro->mainstack)
643 { 945 {
644 perl_slots tmp_slot;
645 perl_slots *slot;
646
647 if (coro->flags & CF_RUNNING) 946 if (coro->flags & CF_RUNNING)
648 { 947 {
649 slot = &tmp_slot; 948 #define SYM(sym) PL_ ## sym
650 949 CORO_RSS;
651 #define VAR(name,type) slot->name = PL_ ## name;
652 # include "state.h"
653 #undef VAR 950 #undef SYM
654 } 951 }
655 else 952 else
656 slot = coro->slot; 953 {
954 #define SYM(sym) coro->slot->sym
955 CORO_RSS;
956 #undef SYM
957 }
958 }
657 959
658 rss += sizeof (slot->curstackinfo); 960 return rss;
659 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 961}
660 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
661 rss += slot->tmps_max * sizeof (SV *);
662 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
663 rss += slot->scopestack_max * sizeof (I32);
664 rss += slot->savestack_max * sizeof (ANY);
665 962
666#if !PERL_VERSION_ATLEAST (5,9,0) 963/** coroutine stack handling ************************************************/
667 rss += slot->retstack_max * sizeof (OP *); 964
965static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
966static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
967static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
968
969/* apparently < 5.8.8 */
970#ifndef MgPV_nolen_const
971#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
972 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
973 (const char*)(mg)->mg_ptr)
668#endif 974#endif
975
976/*
977 * This overrides the default magic get method of %SIG elements.
978 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
979 * and instead of trying to save and restore the hash elements (extremely slow),
980 * we just provide our own readback here.
981 */
982static int ecb_cold
983coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
984{
985 const char *s = MgPV_nolen_const (mg);
986
987 if (*s == '_')
669 } 988 {
989 SV **svp = 0;
670 990
991 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
992 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
993
994 if (svp)
995 {
996 SV *ssv;
997
998 if (!*svp)
999 ssv = &PL_sv_undef;
1000 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1001 ssv = sv_2mortal (newRV_inc (*svp));
1002 else
1003 ssv = *svp;
1004
1005 sv_setsv (sv, ssv);
1006 return 0;
1007 }
1008 }
1009
1010 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1011}
1012
1013static int ecb_cold
1014coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1015{
1016 const char *s = MgPV_nolen_const (mg);
1017
1018 if (*s == '_')
1019 {
1020 SV **svp = 0;
1021
1022 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1023 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1024
1025 if (svp)
1026 {
1027 SV *old = *svp;
1028 *svp = 0;
1029 SvREFCNT_dec (old);
1030 return 0;
1031 }
1032 }
1033
1034 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1035}
1036
1037static int ecb_cold
1038coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1039{
1040 const char *s = MgPV_nolen_const (mg);
1041
1042 if (*s == '_')
1043 {
1044 SV **svp = 0;
1045
1046 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1047 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1048
1049 if (svp)
1050 {
1051 SV *old = *svp;
1052 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1053 SvREFCNT_dec (old);
1054 return 0;
1055 }
1056 }
1057
1058 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1059}
1060
1061static void
1062prepare_nop (pTHX_ struct coro_transfer_args *ta)
1063{
1064 /* kind of mega-hacky, but works */
1065 ta->next = ta->prev = (struct coro *)ta;
1066}
1067
1068static int
1069slf_check_nop (pTHX_ struct CoroSLF *frame)
1070{
671 return rss; 1071 return 0;
672} 1072}
673 1073
674/** coroutine stack handling ************************************************/
675
676static void 1074static int
1075slf_check_repeat (pTHX_ struct CoroSLF *frame)
1076{
1077 return 1;
1078}
1079
1080static UNOP init_perl_op;
1081
1082ecb_noinline static void /* noinline to keep it out of the transfer fast path */
677coro_setup (pTHX_ struct coro *coro) 1083init_perl (pTHX_ struct coro *coro)
678{ 1084{
679 /* 1085 /*
680 * emulate part of the perl startup here. 1086 * emulate part of the perl startup here.
681 */ 1087 */
682 coro_init_stacks (aTHX); 1088 coro_init_stacks (aTHX);
683 1089
684 PL_runops = RUNOPS_DEFAULT; 1090 PL_runops = RUNOPS_DEFAULT;
685 PL_curcop = &PL_compiling; 1091 PL_curcop = &PL_compiling;
686 PL_in_eval = EVAL_NULL; 1092 PL_in_eval = EVAL_NULL;
687 PL_comppad = 0; 1093 PL_comppad = 0;
1094 PL_comppad_name = 0;
1095 PL_comppad_name_fill = 0;
1096 PL_comppad_name_floor = 0;
688 PL_curpm = 0; 1097 PL_curpm = 0;
689 PL_curpad = 0; 1098 PL_curpad = 0;
690 PL_localizing = 0; 1099 PL_localizing = 0;
691 PL_dirty = 0;
692 PL_restartop = 0; 1100 PL_restartop = 0;
693 PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0); 1101#if PERL_VERSION_ATLEAST (5,10,0)
694 PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0); 1102 PL_parser = 0;
695 1103#endif
1104 PL_hints = 0;
1105
1106 /* recreate the die/warn hooks */
1107 PL_diehook = SvREFCNT_inc (rv_diehook);
1108 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1109
696 GvSV (PL_defgv) = newSV (0); 1110 GvSV (PL_defgv) = newSV (0);
697 GvAV (PL_defgv) = coro->args; coro->args = 0; 1111 GvAV (PL_defgv) = coro->args; coro->args = 0;
698 GvSV (PL_errgv) = newSV (0); 1112 GvSV (PL_errgv) = newSV (0);
699 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1113 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1114 GvHV (PL_hintgv) = 0;
700 PL_rs = newSVsv (GvSV (irsgv)); 1115 PL_rs = newSVsv (GvSV (irsgv));
701 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1116 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
702 1117
703 { 1118 {
704 dSP; 1119 dSP;
705 LOGOP myop; 1120 UNOP myop;
706 1121
707 Zero (&myop, 1, LOGOP); 1122 Zero (&myop, 1, UNOP);
708 myop.op_next = Nullop; 1123 myop.op_next = Nullop;
1124 myop.op_type = OP_ENTERSUB;
709 myop.op_flags = OPf_WANT_VOID; 1125 myop.op_flags = OPf_WANT_VOID;
710 1126
711 PUSHMARK (SP); 1127 PUSHMARK (SP);
712 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1128 PUSHs ((SV *)coro->startcv);
713 PUTBACK; 1129 PUTBACK;
714 PL_op = (OP *)&myop; 1130 PL_op = (OP *)&myop;
715 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1131 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
716 SPAGAIN;
717
718 /*
719 * now its very tricky. the "tail" of the next transfer might end up
720 * either in a new cctx, or an existing one.
721 * in case of an existing one we have to take care of whatever
722 * entersub and transfer do to the perl stack.
723 */
724 ENTER;
725 EXTEND (SP, 4);
726 PUSHs ((SV *)0); /* items */
727 PUSHs ((SV *)0); /* ix, set_stacklevel */
728 PUSHs ((SV *)(sp - PL_stack_base + 1)); /* ax */
729 PUSHs ((SV *)0); /* again */
730 PUTBACK;
731 } 1132 }
732 1133
733 /* this newly created coroutine might be run on an existing cctx which most 1134 /* this newly created coroutine might be run on an existing cctx which most
734 * likely was suspended in set_stacklevel, called from entersub. 1135 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
735 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
736 * so we ENTER here for symmetry
737 */ 1136 */
738 ENTER; 1137 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
739} 1138 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1139 slf_frame.destroy = 0;
740 1140
1141 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1142 init_perl_op.op_next = PL_op;
1143 init_perl_op.op_type = OP_ENTERSUB;
1144 init_perl_op.op_ppaddr = pp_slf;
1145 /* no flags etc. required, as an init function won't be called */
1146
1147 PL_op = (OP *)&init_perl_op;
1148
1149 /* copy throw, in case it was set before init_perl */
1150 CORO_THROW = coro->except;
1151
1152 SWAP_SVS (coro);
1153
1154 if (ecb_expect_false (enable_times))
1155 {
1156 coro_times_update ();
1157 coro_times_sub (coro);
1158 }
1159}
1160
741static void 1161static void
742coro_destroy (pTHX_ struct coro *coro) 1162coro_unwind_stacks (pTHX)
743{ 1163{
744 if (!IN_DESTRUCT) 1164 if (!IN_DESTRUCT)
745 { 1165 {
746 /* restore all saved variables and stuff */ 1166 /* restore all saved variables and stuff */
747 LEAVE_SCOPE (0); 1167 LEAVE_SCOPE (0);
… …
755 POPSTACK_TO (PL_mainstack); 1175 POPSTACK_TO (PL_mainstack);
756 1176
757 /* unwind main stack */ 1177 /* unwind main stack */
758 dounwind (-1); 1178 dounwind (-1);
759 } 1179 }
1180}
760 1181
761 SvREFCNT_dec (GvSV (PL_defgv)); 1182static void
762 SvREFCNT_dec (GvAV (PL_defgv)); 1183destroy_perl (pTHX_ struct coro *coro)
763 SvREFCNT_dec (GvSV (PL_errgv)); 1184{
764 SvREFCNT_dec (PL_defoutgv); 1185 SV *svf [9];
765 SvREFCNT_dec (PL_rs);
766 SvREFCNT_dec (GvSV (irsgv));
767 1186
768 SvREFCNT_dec (PL_diehook);
769 SvREFCNT_dec (PL_warnhook);
770 1187 {
1188 SV *old_current = SvRV (coro_current);
1189 struct coro *current = SvSTATE (old_current);
1190
1191 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1192
1193 save_perl (aTHX_ current);
1194
1195 /* this will cause transfer_check to croak on block*/
1196 SvRV_set (coro_current, (SV *)coro->hv);
1197
1198 load_perl (aTHX_ coro);
1199
1200 coro_unwind_stacks (aTHX);
1201
1202 /* restore swapped sv's */
1203 SWAP_SVS (coro);
1204
1205 coro_destruct_stacks (aTHX);
1206
1207 /* now save some sv's to be free'd later */
1208 svf [0] = GvSV (PL_defgv);
1209 svf [1] = (SV *)GvAV (PL_defgv);
1210 svf [2] = GvSV (PL_errgv);
1211 svf [3] = (SV *)PL_defoutgv;
1212 svf [4] = PL_rs;
1213 svf [5] = GvSV (irsgv);
1214 svf [6] = (SV *)GvHV (PL_hintgv);
1215 svf [7] = PL_diehook;
1216 svf [8] = PL_warnhook;
1217 assert (9 == sizeof (svf) / sizeof (*svf));
1218
1219 SvRV_set (coro_current, old_current);
1220
1221 load_perl (aTHX_ current);
1222 }
1223
1224 {
1225 unsigned int i;
1226
1227 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1228 SvREFCNT_dec (svf [i]);
1229
771 SvREFCNT_dec (coro->saved_deffh); 1230 SvREFCNT_dec (coro->saved_deffh);
772 SvREFCNT_dec (coro->throw); 1231 SvREFCNT_dec (coro->rouse_cb);
773 1232 SvREFCNT_dec (coro->invoke_cb);
774 coro_destroy_stacks (aTHX); 1233 SvREFCNT_dec (coro->invoke_av);
1234 }
775} 1235}
776 1236
777static void 1237ecb_inline void
778free_coro_mortal (pTHX) 1238free_coro_mortal (pTHX)
779{ 1239{
780 if (expect_true (coro_mortal)) 1240 if (ecb_expect_true (coro_mortal))
781 { 1241 {
782 SvREFCNT_dec (coro_mortal); 1242 SvREFCNT_dec ((SV *)coro_mortal);
783 coro_mortal = 0; 1243 coro_mortal = 0;
784 } 1244 }
785} 1245}
786 1246
787static int 1247static int
788runops_trace (pTHX) 1248runops_trace (pTHX)
789{ 1249{
790 COP *oldcop = 0; 1250 COP *oldcop = 0;
791 int oldcxix = -2; 1251 int oldcxix = -2;
792 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
793 coro_cctx *cctx = coro->cctx;
794 1252
795 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1253 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
796 { 1254 {
797 PERL_ASYNC_CHECK (); 1255 PERL_ASYNC_CHECK ();
798 1256
799 if (cctx->flags & CC_TRACE_ALL) 1257 if (cctx_current->flags & CC_TRACE_ALL)
800 { 1258 {
801 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1259 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
802 { 1260 {
803 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1261 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
804 SV **bot, **top; 1262 SV **bot, **top;
805 AV *av = newAV (); /* return values */ 1263 AV *av = newAV (); /* return values */
806 SV **cb; 1264 SV **cb;
… …
816 : cx->blk_gimme == G_SCALAR ? bot + 1 1274 : cx->blk_gimme == G_SCALAR ? bot + 1
817 : bot; 1275 : bot;
818 1276
819 av_extend (av, top - bot); 1277 av_extend (av, top - bot);
820 while (bot < top) 1278 while (bot < top)
821 av_push (av, SvREFCNT_inc (*bot++)); 1279 av_push (av, SvREFCNT_inc_NN (*bot++));
822 1280
823 PL_runops = RUNOPS_DEFAULT; 1281 PL_runops = RUNOPS_DEFAULT;
824 ENTER; 1282 ENTER;
825 SAVETMPS; 1283 SAVETMPS;
826 EXTEND (SP, 3); 1284 EXTEND (SP, 3);
827 PUSHMARK (SP); 1285 PUSHMARK (SP);
828 PUSHs (&PL_sv_no); 1286 PUSHs (&PL_sv_no);
829 PUSHs (fullname); 1287 PUSHs (fullname);
830 PUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 1288 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
831 PUTBACK; 1289 PUTBACK;
832 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0); 1290 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
833 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1291 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
834 SPAGAIN; 1292 SPAGAIN;
835 FREETMPS; 1293 FREETMPS;
836 LEAVE; 1294 LEAVE;
837 PL_runops = runops_trace; 1295 PL_runops = runops_trace;
… …
843 1301
844 if (PL_curcop != &PL_compiling) 1302 if (PL_curcop != &PL_compiling)
845 { 1303 {
846 SV **cb; 1304 SV **cb;
847 1305
848 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1306 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
849 { 1307 {
850 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1308 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
851 1309
852 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1310 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
853 { 1311 {
854 runops_proc_t old_runops = PL_runops;
855 dSP; 1312 dSP;
856 GV *gv = CvGV (cx->blk_sub.cv); 1313 GV *gv = CvGV (cx->blk_sub.cv);
857 SV *fullname = sv_2mortal (newSV (0)); 1314 SV *fullname = sv_2mortal (newSV (0));
858 1315
859 if (isGV (gv)) 1316 if (isGV (gv))
… …
864 SAVETMPS; 1321 SAVETMPS;
865 EXTEND (SP, 3); 1322 EXTEND (SP, 3);
866 PUSHMARK (SP); 1323 PUSHMARK (SP);
867 PUSHs (&PL_sv_yes); 1324 PUSHs (&PL_sv_yes);
868 PUSHs (fullname); 1325 PUSHs (fullname);
869 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1326 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
870 PUTBACK; 1327 PUTBACK;
871 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0); 1328 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
872 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1329 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
873 SPAGAIN; 1330 SPAGAIN;
874 FREETMPS; 1331 FREETMPS;
875 LEAVE; 1332 LEAVE;
876 PL_runops = runops_trace; 1333 PL_runops = runops_trace;
877 } 1334 }
878 1335
879 oldcxix = cxstack_ix; 1336 oldcxix = cxstack_ix;
880 } 1337 }
881 1338
882 if (cctx->flags & CC_TRACE_LINE) 1339 if (cctx_current->flags & CC_TRACE_LINE)
883 { 1340 {
884 dSP; 1341 dSP;
885 1342
886 PL_runops = RUNOPS_DEFAULT; 1343 PL_runops = RUNOPS_DEFAULT;
887 ENTER; 1344 ENTER;
… …
890 PL_runops = RUNOPS_DEFAULT; 1347 PL_runops = RUNOPS_DEFAULT;
891 PUSHMARK (SP); 1348 PUSHMARK (SP);
892 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); 1349 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
893 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); 1350 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
894 PUTBACK; 1351 PUTBACK;
895 cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0); 1352 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
896 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1353 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
897 SPAGAIN; 1354 SPAGAIN;
898 FREETMPS; 1355 FREETMPS;
899 LEAVE; 1356 LEAVE;
900 PL_runops = runops_trace; 1357 PL_runops = runops_trace;
… …
906 1363
907 TAINT_NOT; 1364 TAINT_NOT;
908 return 0; 1365 return 0;
909} 1366}
910 1367
911/* inject a fake call to Coro::State::_cctx_init into the execution */ 1368static struct CoroSLF cctx_ssl_frame;
912/* _cctx_init should be careful, as it could be called at almost any time */
913/* during execution of a perl program */
914static void NOINLINE
915cctx_prepare (pTHX_ coro_cctx *cctx)
916{
917 dSP;
918 LOGOP myop;
919 1369
1370static void
1371slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1372{
1373 ta->prev = 0;
1374}
1375
1376static int
1377slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1378{
1379 *frame = cctx_ssl_frame;
1380
1381 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1382}
1383
1384/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1385static void ecb_noinline
1386cctx_prepare (pTHX)
1387{
920 PL_top_env = &PL_start_env; 1388 PL_top_env = &PL_start_env;
921 1389
922 if (cctx->flags & CC_TRACE) 1390 if (cctx_current->flags & CC_TRACE)
923 PL_runops = runops_trace; 1391 PL_runops = runops_trace;
924 1392
925 Zero (&myop, 1, LOGOP); 1393 /* we already must be executing an SLF op, there is no other valid way
926 myop.op_next = PL_op; 1394 * that can lead to creation of a new cctx */
927 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1395 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1396 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
928 1397
929 PUSHMARK (SP); 1398 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
930 EXTEND (SP, 2); 1399 cctx_ssl_frame = slf_frame;
931 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1400
932 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1401 slf_frame.prepare = slf_prepare_set_stacklevel;
933 PUTBACK; 1402 slf_frame.check = slf_check_set_stacklevel;
934 PL_op = (OP *)&myop; 1403}
935 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1404
936 SPAGAIN; 1405/* the tail of transfer: execute stuff we can only do after a transfer */
1406ecb_inline void
1407transfer_tail (pTHX)
1408{
1409 free_coro_mortal (aTHX);
1410}
1411
1412/* try to exit the same way perl's main function would do */
1413/* we do not bother resetting the environment or other things *7
1414/* that are not, uhm, essential */
1415/* this obviously also doesn't work when perl is embedded */
1416static void ecb_noinline ecb_cold
1417perlish_exit (pTHX)
1418{
1419 int exitstatus = perl_destruct (PL_curinterp);
1420 perl_free (PL_curinterp);
1421 exit (exitstatus);
937} 1422}
938 1423
939/* 1424/*
940 * this is a _very_ stripped down perl interpreter ;) 1425 * this is a _very_ stripped down perl interpreter ;)
941 */ 1426 */
942static void 1427static void
943cctx_run (void *arg) 1428cctx_run (void *arg)
944{ 1429{
1430#ifdef USE_ITHREADS
1431# if CORO_PTHREAD
1432 PERL_SET_CONTEXT (coro_thx);
1433# endif
1434#endif
1435 {
945 dTHX; 1436 dTHX;
946 1437
947 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1438 /* normally we would need to skip the entersub here */
948 UNLOCK; 1439 /* not doing so will re-execute it, which is exactly what we want */
949
950 /* we now skip the entersub that lead to transfer() */
951 PL_op = PL_op->op_next; 1440 /* PL_nop = PL_nop->op_next */
952 1441
953 /* inject a fake subroutine call to cctx_init */ 1442 /* inject a fake subroutine call to cctx_init */
954 cctx_prepare (aTHX_ (coro_cctx *)arg); 1443 cctx_prepare (aTHX);
955 1444
1445 /* cctx_run is the alternative tail of transfer() */
1446 transfer_tail (aTHX);
1447
956 /* somebody or something will hit me for both perl_run and PL_restartop */ 1448 /* somebody or something will hit me for both perl_run and PL_restartop */
957 PL_restartop = PL_op; 1449 PL_restartop = PL_op;
958 perl_run (PL_curinterp); 1450 perl_run (PL_curinterp);
959
960 /* 1451 /*
1452 * Unfortunately, there is no way to get at the return values of the
1453 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1454 * runtime errors here, as this is just a random interpreter, not a thread.
1455 */
1456
1457 /*
961 * If perl-run returns we assume exit() was being called or the coro 1458 * If perl-run returns we assume exit() was being called or the coro
962 * fell off the end, which seems to be the only valid (non-bug) 1459 * fell off the end, which seems to be the only valid (non-bug)
963 * reason for perl_run to return. We try to exit by jumping to the 1460 * reason for perl_run to return. We try to mimic whatever perl is normally
964 * bootstrap-time "top" top_env, as we cannot restore the "main" 1461 * doing in that case. YMMV.
965 * coroutine as Coro has no such concept
966 */ 1462 */
967 PL_top_env = main_top_env; 1463 perlish_exit (aTHX);
968 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1464 }
969} 1465}
970 1466
971static coro_cctx * 1467static coro_cctx *
972cctx_new () 1468cctx_new (void)
973{ 1469{
974 coro_cctx *cctx; 1470 coro_cctx *cctx;
975 void *stack_start;
976 size_t stack_size;
977 1471
978 ++cctx_count; 1472 ++cctx_count;
979
980 Newz (0, cctx, 1, coro_cctx); 1473 New (0, cctx, 1, coro_cctx);
981 1474
982#if HAVE_MMAP 1475 cctx->gen = cctx_gen;
983 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1476 cctx->flags = 0;
984 /* mmap supposedly does allocate-on-write for us */ 1477 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
985 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
986 1478
987 if (cctx->sptr != (void *)-1) 1479 return cctx;
988 { 1480}
989# if CORO_STACKGUARD 1481
990 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1482/* create a new cctx only suitable as source */
991# endif 1483static coro_cctx *
992 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1484cctx_new_empty (void)
993 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1485{
994 cctx->flags |= CC_MAPPED; 1486 coro_cctx *cctx = cctx_new ();
1487
1488 cctx->stack.sptr = 0;
1489 coro_create (&cctx->cctx, 0, 0, 0, 0);
1490
1491 return cctx;
1492}
1493
1494/* create a new cctx suitable as destination/running a perl interpreter */
1495static coro_cctx *
1496cctx_new_run (void)
1497{
1498 coro_cctx *cctx = cctx_new ();
1499
1500 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
995 } 1501 {
996 else
997#endif
998 {
999 cctx->ssize = coro_stacksize * (long)sizeof (long);
1000 New (0, cctx->sptr, coro_stacksize, long);
1001
1002 if (!cctx->sptr)
1003 {
1004 perror ("FATAL: unable to allocate stack for coroutine"); 1502 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1005 _exit (EXIT_FAILURE); 1503 _exit (EXIT_FAILURE);
1006 }
1007
1008 stack_start = cctx->sptr;
1009 stack_size = cctx->ssize;
1010 } 1504 }
1011 1505
1012 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1013 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1506 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1014 1507
1015 return cctx; 1508 return cctx;
1016} 1509}
1017 1510
1018static void 1511static void
1019cctx_destroy (coro_cctx *cctx) 1512cctx_destroy (coro_cctx *cctx)
1020{ 1513{
1021 if (!cctx) 1514 if (!cctx)
1022 return; 1515 return;
1023 1516
1517 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1518
1024 --cctx_count; 1519 --cctx_count;
1520 coro_destroy (&cctx->cctx);
1025 1521
1026#if CORO_USE_VALGRIND 1522 coro_stack_free (&cctx->stack);
1027 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1523
1524 Safefree (cctx);
1525}
1526
1527/* wether this cctx should be destructed */
1528#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1529
1530static coro_cctx *
1531cctx_get (pTHX)
1532{
1533 while (ecb_expect_true (cctx_first))
1534 {
1535 coro_cctx *cctx = cctx_first;
1536 cctx_first = cctx->next;
1537 --cctx_idle;
1538
1539 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1540 return cctx;
1541
1542 cctx_destroy (cctx);
1543 }
1544
1545 return cctx_new_run ();
1546}
1547
1548static void
1549cctx_put (coro_cctx *cctx)
1550{
1551 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1552
1553 /* free another cctx if overlimit */
1554 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1555 {
1556 coro_cctx *first = cctx_first;
1557 cctx_first = first->next;
1558 --cctx_idle;
1559
1560 cctx_destroy (first);
1561 }
1562
1563 ++cctx_idle;
1564 cctx->next = cctx_first;
1565 cctx_first = cctx;
1566}
1567
1568/** coroutine switching *****************************************************/
1569
1570static void
1571transfer_check (pTHX_ struct coro *prev, struct coro *next)
1572{
1573 /* TODO: throwing up here is considered harmful */
1574
1575 if (ecb_expect_true (prev != next))
1576 {
1577 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1579
1580 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1582
1583#if !PERL_VERSION_ATLEAST (5,10,0)
1584 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1028#endif 1586#endif
1029
1030#if HAVE_MMAP
1031 if (cctx->flags & CC_MAPPED)
1032 munmap (cctx->sptr, cctx->ssize);
1033 else
1034#endif
1035 Safefree (cctx->sptr);
1036
1037 Safefree (cctx);
1038}
1039
1040/* wether this cctx should be destructed */
1041#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1042
1043static coro_cctx *
1044cctx_get (pTHX_ int gimme)
1045{
1046 while (expect_true (cctx_first[gimme]))
1047 {
1048 coro_cctx *cctx = cctx_first[gimme];
1049 cctx_first[gimme] = cctx->next;
1050 --cctx_idle[gimme];
1051
1052 if (expect_true (!CCTX_EXPIRED (cctx)))
1053 return cctx;
1054
1055 cctx_destroy (cctx);
1056 }
1057
1058 assert (!gimme);
1059 return cctx_new ();
1060}
1061
1062static void
1063cctx_put (coro_cctx *cctx, int gimme)
1064{
1065 /* free another cctx if overlimit */
1066 if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
1067 {
1068 coro_cctx *first = cctx_first[gimme];
1069 cctx_first[gimme] = first->next;
1070 --cctx_idle[gimme];
1071
1072 cctx_destroy (first);
1073 }
1074
1075 ++cctx_idle[gimme];
1076 cctx->next = cctx_first[gimme];
1077 cctx_first[gimme] = cctx;
1078}
1079
1080/** coroutine switching *****************************************************/
1081
1082static void
1083transfer_check (pTHX_ struct coro *prev, struct coro *next)
1084{
1085 if (expect_true (prev != next))
1086 {
1087 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1088 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1089
1090 if (expect_false (next->flags & CF_RUNNING))
1091 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1092
1093 if (expect_false (next->flags & CF_DESTROYED))
1094 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1095
1096 if (
1097#if PERL_VERSION_ATLEAST (5,9,0)
1098 expect_false (PL_parser)
1099#else
1100 expect_false (PL_lex_state != LEX_NOTPARSING)
1101#endif
1102 )
1103 croak ("Coro::State::transfer called while parsing, but this is not supported");
1104 } 1587 }
1105} 1588}
1106 1589
1107/* always use the TRANSFER macro */ 1590/* always use the TRANSFER macro */
1108static void NOINLINE 1591static void ecb_noinline /* noinline so we have a fixed stackframe */
1109transfer (pTHX_ struct coro *prev, struct coro *next) 1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1110{ 1593{
1111 dSTACKLEVEL; 1594 dSTACKLEVEL;
1112 1595
1113 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
1114 if (expect_false (!next)) 1597 if (ecb_expect_false (!prev))
1115 { 1598 {
1116 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1599 cctx_current->idle_sp = STACKLEVEL;
1117 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1118 } 1601 }
1119 else if (expect_true (prev != next)) 1602 else if (ecb_expect_true (prev != next))
1120 { 1603 {
1121 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
1122 1605
1123 if (expect_false (prev->flags & CF_NEW)) 1606 if (ecb_expect_false (prev->flags & CF_NEW))
1124 { 1607 {
1125 /* create a new empty context */ 1608 /* create a new empty/source context */
1126 Newz (0, prev->cctx, 1, coro_cctx);
1127 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
1128 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
1129 } 1611 }
1130 1612
1131 prev->flags &= ~CF_RUNNING; 1613 prev->flags &= ~CF_RUNNING;
1132 next->flags |= CF_RUNNING; 1614 next->flags |= CF_RUNNING;
1133 1615
1134 LOCK; 1616 /* first get rid of the old state */
1617 save_perl (aTHX_ prev);
1135 1618
1136 if (expect_false (next->flags & CF_NEW)) 1619 if (ecb_expect_false (next->flags & CF_NEW))
1137 { 1620 {
1138 /* need to start coroutine */ 1621 /* need to start coroutine */
1139 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
1140 /* first get rid of the old state */
1141 save_perl (aTHX_ prev);
1142 /* setup coroutine call */ 1623 /* setup coroutine call */
1143 coro_setup (aTHX_ next); 1624 init_perl (aTHX_ next);
1144 } 1625 }
1145 else 1626 else
1627 load_perl (aTHX_ next);
1628
1629 /* possibly untie and reuse the cctx */
1630 if (ecb_expect_true (
1631 cctx_current->idle_sp == STACKLEVEL
1632 && !(cctx_current->flags & CC_TRACE)
1633 && !force_cctx
1634 ))
1146 { 1635 {
1147 /* coroutine already started */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1148 save_perl (aTHX_ prev); 1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1149 load_perl (aTHX_ next); 1638
1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1641 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1642 if (ecb_expect_true (!next->cctx))
1643 next->cctx = cctx_get (aTHX);
1644
1645 cctx_put (cctx_current);
1150 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
1151 1649
1152 prev__cctx = prev->cctx; 1650 ++next->usecount;
1153 1651
1154 /* possibly "free" the cctx */ 1652 cctx_prev = cctx_current;
1155 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1653 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1654
1655 next->cctx = 0;
1656
1657 if (ecb_expect_false (cctx_prev != cctx_current))
1156 { 1658 {
1157 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1659 cctx_prev->top_env = PL_top_env;
1158 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1660 PL_top_env = cctx_current->top_env;
1159 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1160 prev->cctx = 0;
1161
1162 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1163 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1164 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1165 if (!next->cctx)
1166 next->cctx = cctx_get (aTHX_ next->gimme);
1167
1168 cctx_put (prev__cctx, prev->gimme);
1169 } 1662 }
1170 1663
1171 ++next->usecount; 1664 transfer_tail (aTHX);
1172
1173 if (expect_true (!next->cctx))
1174 next->cctx = cctx_get (aTHX_ next->gimme);
1175
1176 if (expect_false (prev__cctx != next->cctx))
1177 {
1178 prev__cctx->top_env = PL_top_env;
1179 PL_top_env = next->cctx->top_env;
1180 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1181 }
1182
1183 free_coro_mortal (aTHX);
1184 UNLOCK;
1185
1186 if (expect_false (prev->throw || next->throw))
1187 {
1188 struct coro *coro = SvSTATE (coro_current);
1189
1190 if (coro->throw)
1191 {
1192 SV *exception = coro->throw;
1193 coro->throw = 0;
1194 sv_setsv (ERRSV, exception);
1195 croak (0);
1196 }
1197 }
1198 } 1665 }
1199} 1666}
1200 1667
1201struct transfer_args
1202{
1203 struct coro *prev, *next;
1204};
1205
1206#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1207#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1208 1670
1209/** high level stuff ********************************************************/ 1671/** high level stuff ********************************************************/
1210 1672
1673/* this function is actually Coro, not Coro::State, but we call it from here */
1674/* because it is convenient - but it hasn't been declared yet for that reason */
1211static int 1675static void
1676coro_call_on_destroy (pTHX_ struct coro *coro);
1677
1678static void
1212coro_state_destroy (pTHX_ struct coro *coro) 1679coro_state_destroy (pTHX_ struct coro *coro)
1213{ 1680{
1214 if (coro->flags & CF_DESTROYED) 1681 if (coro->flags & CF_ZOMBIE)
1215 return 0; 1682 return;
1216 1683
1684 slf_destroy (aTHX_ coro);
1685
1217 coro->flags |= CF_DESTROYED; 1686 coro->flags |= CF_ZOMBIE;
1218 1687
1219 if (coro->flags & CF_READY) 1688 if (coro->flags & CF_READY)
1220 { 1689 {
1221 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1690 /* reduce nready, as destroying a ready coro effectively unreadies it */
1222 /* alternative: look through all ready queues and remove the coro */ 1691 /* alternative: look through all ready queues and remove the coro */
1223 LOCK;
1224 --coro_nready; 1692 --coro_nready;
1225 UNLOCK;
1226 } 1693 }
1227 else 1694 else
1228 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1695 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1229
1230 if (coro->mainstack && coro->mainstack != main_mainstack)
1231 {
1232 struct coro temp;
1233
1234 if (coro->flags & CF_RUNNING)
1235 croak ("FATAL: tried to destroy currently running coroutine");
1236
1237 save_perl (aTHX_ &temp);
1238 load_perl (aTHX_ coro);
1239
1240 coro_destroy (aTHX_ coro);
1241
1242 load_perl (aTHX_ &temp);
1243
1244 coro->slot = 0;
1245 }
1246
1247 cctx_destroy (coro->cctx);
1248 SvREFCNT_dec (coro->args);
1249 1696
1250 if (coro->next) coro->next->prev = coro->prev; 1697 if (coro->next) coro->next->prev = coro->prev;
1251 if (coro->prev) coro->prev->next = coro->next; 1698 if (coro->prev) coro->prev->next = coro->next;
1252 if (coro == coro_first) coro_first = coro->next; 1699 if (coro == coro_first) coro_first = coro->next;
1253 1700
1254 return 1; 1701 if (coro->mainstack
1702 && coro->mainstack != main_mainstack
1703 && coro->slot
1704 && !PL_dirty)
1705 destroy_perl (aTHX_ coro);
1706
1707 cctx_destroy (coro->cctx);
1708 SvREFCNT_dec (coro->startcv);
1709 SvREFCNT_dec (coro->args);
1710 SvREFCNT_dec (coro->swap_sv);
1711 SvREFCNT_dec (CORO_THROW);
1712
1713 coro_call_on_destroy (aTHX_ coro);
1714
1715 /* more destruction mayhem in coro_state_free */
1255} 1716}
1256 1717
1257static int 1718static int
1258coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1719coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1259{ 1720{
1260 struct coro *coro = (struct coro *)mg->mg_ptr; 1721 struct coro *coro = (struct coro *)mg->mg_ptr;
1261 mg->mg_ptr = 0; 1722 mg->mg_ptr = 0;
1262 1723
1263 coro->hv = 0;
1264
1265 if (--coro->refcnt < 0)
1266 {
1267 coro_state_destroy (aTHX_ coro); 1724 coro_state_destroy (aTHX_ coro);
1725 SvREFCNT_dec (coro->on_destroy);
1726 SvREFCNT_dec (coro->status);
1727
1268 Safefree (coro); 1728 Safefree (coro);
1269 }
1270 1729
1271 return 0; 1730 return 0;
1272} 1731}
1273 1732
1274static int 1733static int ecb_cold
1275coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1734coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1276{ 1735{
1277 struct coro *coro = (struct coro *)mg->mg_ptr; 1736 /* called when perl clones the current process the slow way (windows process emulation) */
1278 1737 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1279 ++coro->refcnt; 1738 mg->mg_ptr = 0;
1739 mg->mg_virtual = 0;
1280 1740
1281 return 0; 1741 return 0;
1282} 1742}
1283 1743
1284static MGVTBL coro_state_vtbl = { 1744static MGVTBL coro_state_vtbl = {
… …
1291# define MGf_DUP 0 1751# define MGf_DUP 0
1292#endif 1752#endif
1293}; 1753};
1294 1754
1295static void 1755static void
1296prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1756prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1297{ 1757{
1298 ta->prev = SvSTATE (prev_sv); 1758 ta->prev = SvSTATE (prev_sv);
1299 ta->next = SvSTATE (next_sv); 1759 ta->next = SvSTATE (next_sv);
1300 TRANSFER_CHECK (*ta); 1760 TRANSFER_CHECK (*ta);
1301} 1761}
1302 1762
1303static void 1763static void
1304api_transfer (SV *prev_sv, SV *next_sv) 1764api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1765{
1766 struct coro_transfer_args ta;
1767
1768 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1769 TRANSFER (ta, 1);
1770}
1771
1772/** Coro ********************************************************************/
1773
1774ecb_inline void
1775coro_enq (pTHX_ struct coro *coro)
1776{
1777 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1778
1779 SvREFCNT_inc_NN (coro->hv);
1780
1781 coro->next_ready = 0;
1782 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1783 ready [1] = coro;
1784}
1785
1786ecb_inline struct coro *
1787coro_deq (pTHX)
1788{
1789 int prio;
1790
1791 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1792 {
1793 struct coro **ready = coro_ready [prio];
1794
1795 if (ready [0])
1796 {
1797 struct coro *coro = ready [0];
1798 ready [0] = coro->next_ready;
1799 return coro;
1800 }
1801 }
1802
1803 return 0;
1804}
1805
1806static void
1807invoke_sv_ready_hook_helper (void)
1305{ 1808{
1306 dTHX; 1809 dTHX;
1307 struct transfer_args ta; 1810 dSP;
1308 1811
1309 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1812 ENTER;
1310 TRANSFER (ta); 1813 SAVETMPS;
1311}
1312 1814
1313/** Coro ********************************************************************/ 1815 PUSHMARK (SP);
1816 PUTBACK;
1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1314 1818
1315static void 1819 FREETMPS;
1316coro_enq (pTHX_ SV *coro_sv) 1820 LEAVE;
1317{
1318 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1319}
1320
1321static SV *
1322coro_deq (pTHX_ int min_prio)
1323{
1324 int prio = PRIO_MAX - PRIO_MIN;
1325
1326 min_prio -= PRIO_MIN;
1327 if (min_prio < 0)
1328 min_prio = 0;
1329
1330 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1331 if (AvFILLp (coro_ready [prio]) >= 0)
1332 return av_shift (coro_ready [prio]);
1333
1334 return 0;
1335} 1821}
1336 1822
1337static int 1823static int
1338api_ready (SV *coro_sv) 1824api_ready (pTHX_ SV *coro_sv)
1339{ 1825{
1340 dTHX;
1341 struct coro *coro;
1342
1343 if (SvROK (coro_sv))
1344 coro_sv = SvRV (coro_sv);
1345
1346 coro = SvSTATE (coro_sv); 1826 struct coro *coro = SvSTATE (coro_sv);
1347 1827
1348 if (coro->flags & CF_READY) 1828 if (coro->flags & CF_READY)
1349 return 0; 1829 return 0;
1350 1830
1351 coro->flags |= CF_READY; 1831 coro->flags |= CF_READY;
1352 1832
1353 LOCK; 1833 coro_enq (aTHX_ coro);
1354 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1834
1355 ++coro_nready; 1835 if (!coro_nready++)
1356 UNLOCK; 1836 if (coroapi.readyhook)
1837 coroapi.readyhook ();
1357 1838
1358 return 1; 1839 return 1;
1359} 1840}
1360 1841
1361static int 1842static int
1362api_is_ready (SV *coro_sv) 1843api_is_ready (pTHX_ SV *coro_sv)
1363{ 1844{
1364 dTHX;
1365 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1366} 1846}
1367 1847
1368static void 1848/* expects to own a reference to next->hv */
1849ecb_inline void
1369prepare_schedule (pTHX_ struct transfer_args *ta) 1850prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1370{ 1851{
1371 SV *prev_sv, *next_sv;
1372
1373 for (;;)
1374 {
1375 LOCK;
1376 next_sv = coro_deq (aTHX_ PRIO_MIN);
1377
1378 /* nothing to schedule: call the idle handler */
1379 if (expect_false (!next_sv))
1380 {
1381 dSP;
1382 UNLOCK;
1383
1384 ENTER;
1385 SAVETMPS;
1386
1387 PUSHMARK (SP);
1388 PUTBACK;
1389 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1390
1391 FREETMPS;
1392 LEAVE;
1393 continue;
1394 }
1395
1396 ta->next = SvSTATE (next_sv);
1397
1398 /* cannot transfer to destroyed coros, skip and look for next */
1399 if (expect_false (ta->next->flags & CF_DESTROYED))
1400 {
1401 UNLOCK;
1402 SvREFCNT_dec (next_sv);
1403 /* coro_nready is already taken care of by destroy */
1404 continue;
1405 }
1406
1407 --coro_nready;
1408 UNLOCK;
1409 break;
1410 }
1411
1412 /* free this only after the transfer */
1413 prev_sv = SvRV (coro_current); 1852 SV *prev_sv = SvRV (coro_current);
1853
1414 ta->prev = SvSTATE (prev_sv); 1854 ta->prev = SvSTATE_hv (prev_sv);
1855 ta->next = next;
1856
1415 TRANSFER_CHECK (*ta); 1857 TRANSFER_CHECK (*ta);
1416 assert (ta->next->flags & CF_READY); 1858
1417 ta->next->flags &= ~CF_READY;
1418 SvRV_set (coro_current, next_sv); 1859 SvRV_set (coro_current, (SV *)next->hv);
1419 1860
1420 LOCK;
1421 free_coro_mortal (aTHX); 1861 free_coro_mortal (aTHX);
1422 coro_mortal = prev_sv; 1862 coro_mortal = prev_sv;
1423 UNLOCK;
1424} 1863}
1425 1864
1426static void 1865static void
1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1867{
1868 for (;;)
1869 {
1870 struct coro *next = coro_deq (aTHX);
1871
1872 if (ecb_expect_true (next))
1873 {
1874 /* cannot transfer to destroyed coros, skip and look for next */
1875 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1877 else
1878 {
1879 next->flags &= ~CF_READY;
1880 --coro_nready;
1881
1882 prepare_schedule_to (aTHX_ ta, next);
1883 break;
1884 }
1885 }
1886 else
1887 {
1888 /* nothing to schedule: call the idle handler */
1889 if (SvROK (sv_idle)
1890 && SvOBJECT (SvRV (sv_idle)))
1891 {
1892 if (SvRV (sv_idle) == SvRV (coro_current))
1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1894
1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1896 api_ready (aTHX_ SvRV (sv_idle));
1897 --coro_nready;
1898 }
1899 else
1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
1914 }
1915 }
1916}
1917
1918ecb_inline void
1427prepare_cede (pTHX_ struct transfer_args *ta) 1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
1428{ 1920{
1429 api_ready (coro_current); 1921 api_ready (aTHX_ coro_current);
1430 prepare_schedule (aTHX_ ta); 1922 prepare_schedule (aTHX_ ta);
1431} 1923}
1432 1924
1925ecb_inline void
1926prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1927{
1928 SV *prev = SvRV (coro_current);
1929
1930 if (coro_nready)
1931 {
1932 prepare_schedule (aTHX_ ta);
1933 api_ready (aTHX_ prev);
1934 }
1935 else
1936 prepare_nop (aTHX_ ta);
1937}
1938
1939static void
1940api_schedule (pTHX)
1941{
1942 struct coro_transfer_args ta;
1943
1944 prepare_schedule (aTHX_ &ta);
1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1956}
1957
1433static int 1958static int
1434prepare_cede_notself (pTHX_ struct transfer_args *ta) 1959api_cede (pTHX)
1435{ 1960{
1436 if (coro_nready) 1961 struct coro_transfer_args ta;
1437 { 1962
1438 SV *prev = SvRV (coro_current);
1439 prepare_schedule (aTHX_ ta); 1963 prepare_cede (aTHX_ &ta);
1440 api_ready (prev); 1964
1965 if (ecb_expect_true (ta.prev != ta.next))
1966 {
1967 TRANSFER (ta, 1);
1441 return 1; 1968 return 1;
1442 } 1969 }
1443 else 1970 else
1444 return 0; 1971 return 0;
1445} 1972}
1446 1973
1447static void
1448api_schedule (void)
1449{
1450 dTHX;
1451 struct transfer_args ta;
1452
1453 prepare_schedule (aTHX_ &ta);
1454 TRANSFER (ta);
1455}
1456
1457static int 1974static int
1458api_cede (void) 1975api_cede_notself (pTHX)
1459{ 1976{
1460 dTHX; 1977 if (coro_nready)
1978 {
1461 struct transfer_args ta; 1979 struct coro_transfer_args ta;
1462 1980
1463 prepare_cede (aTHX_ &ta); 1981 prepare_cede_notself (aTHX_ &ta);
1464
1465 if (expect_true (ta.prev != ta.next))
1466 {
1467 TRANSFER (ta); 1982 TRANSFER (ta, 1);
1468 return 1; 1983 return 1;
1469 } 1984 }
1470 else 1985 else
1471 return 0; 1986 return 0;
1472} 1987}
1473 1988
1474static int 1989static void
1475api_cede_notself (void)
1476{
1477 dTHX;
1478 struct transfer_args ta;
1479
1480 if (prepare_cede_notself (aTHX_ &ta))
1481 {
1482 TRANSFER (ta);
1483 return 1;
1484 }
1485 else
1486 return 0;
1487}
1488
1489static void
1490api_trace (SV *coro_sv, int flags) 1990api_trace (pTHX_ SV *coro_sv, int flags)
1491{ 1991{
1492 dTHX;
1493 struct coro *coro = SvSTATE (coro_sv); 1992 struct coro *coro = SvSTATE (coro_sv);
1494 1993
1994 if (coro->flags & CF_RUNNING)
1995 croak ("cannot enable tracing on a running coroutine, caught");
1996
1495 if (flags & CC_TRACE) 1997 if (flags & CC_TRACE)
1496 { 1998 {
1497 if (!coro->cctx) 1999 if (!coro->cctx)
1498 coro->cctx = cctx_new (); 2000 coro->cctx = cctx_new_run ();
1499 else if (!(coro->cctx->flags & CC_TRACE)) 2001 else if (!(coro->cctx->flags & CC_TRACE))
1500 croak ("cannot enable tracing on coroutine with custom stack"); 2002 croak ("cannot enable tracing on coroutine with custom stack, caught");
1501 2003
1502 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2004 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1503 } 2005 }
1504 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2006 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1505 { 2007 {
… …
1510 else 2012 else
1511 coro->slot->runops = RUNOPS_DEFAULT; 2013 coro->slot->runops = RUNOPS_DEFAULT;
1512 } 2014 }
1513} 2015}
1514 2016
2017static void
2018coro_push_av (pTHX_ AV *av, I32 gimme_v)
2019{
2020 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2021 {
2022 dSP;
2023
2024 if (gimme_v == G_SCALAR)
2025 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2026 else
2027 {
2028 int i;
2029 EXTEND (SP, AvFILLp (av) + 1);
2030
2031 for (i = 0; i <= AvFILLp (av); ++i)
2032 PUSHs (AvARRAY (av)[i]);
2033 }
2034
2035 PUTBACK;
2036 }
2037}
2038
2039static void
2040coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2041{
2042 if (!coro->on_destroy)
2043 coro->on_destroy = newAV ();
2044
2045 av_push (coro->on_destroy, cb);
2046}
2047
2048static void
2049slf_destroy_join (pTHX_ struct CoroSLF *frame)
2050{
2051 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2052}
2053
2054static int
2055slf_check_join (pTHX_ struct CoroSLF *frame)
2056{
2057 struct coro *coro = (struct coro *)frame->data;
2058
2059 if (!coro->status)
2060 return 1;
2061
2062 frame->destroy = 0;
2063
2064 coro_push_av (aTHX_ coro->status, GIMME_V);
2065
2066 SvREFCNT_dec ((SV *)coro->hv);
2067
2068 return 0;
2069}
2070
2071static void
2072slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2073{
2074 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2075
2076 if (items > 1)
2077 croak ("join called with too many arguments");
2078
2079 if (coro->status)
2080 frame->prepare = prepare_nop;
2081 else
2082 {
2083 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2084 frame->prepare = prepare_schedule;
2085 }
2086
2087 frame->check = slf_check_join;
2088 frame->destroy = slf_destroy_join;
2089 frame->data = (void *)coro;
2090 SvREFCNT_inc (coro->hv);
2091}
2092
2093static void
2094coro_call_on_destroy (pTHX_ struct coro *coro)
2095{
2096 AV *od = coro->on_destroy;
2097
2098 if (!od)
2099 return;
2100
2101 while (AvFILLp (od) >= 0)
2102 {
2103 SV *cb = sv_2mortal (av_pop (od));
2104
2105 /* coro hv's (and only hv's at the moment) are supported as well */
2106 if (SvSTATEhv_p (aTHX_ cb))
2107 api_ready (aTHX_ cb);
2108 else
2109 {
2110 dSP; /* don't disturb outer sp */
2111 PUSHMARK (SP);
2112
2113 if (coro->status)
2114 {
2115 PUTBACK;
2116 coro_push_av (aTHX_ coro->status, G_ARRAY);
2117 SPAGAIN;
2118 }
2119
2120 PUTBACK;
2121 call_sv (cb, G_VOID | G_DISCARD);
2122 }
2123 }
2124}
2125
2126static void
2127coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2128{
2129 AV *av;
2130
2131 if (coro->status)
2132 {
2133 av = coro->status;
2134 av_clear (av);
2135 }
2136 else
2137 av = coro->status = newAV ();
2138
2139 /* items are actually not so common, so optimise for this case */
2140 if (items)
2141 {
2142 int i;
2143
2144 av_extend (av, items - 1);
2145
2146 for (i = 0; i < items; ++i)
2147 av_push (av, SvREFCNT_inc_NN (arg [i]));
2148 }
2149}
2150
2151static void
2152slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2153{
2154 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2155 api_ready (aTHX_ sv_manager);
2156
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_repeat;
2159
2160 /* as a minor optimisation, we could unwind all stacks here */
2161 /* but that puts extra pressure on pp_slf, and is not worth much */
2162 /*coro_unwind_stacks (aTHX);*/
2163}
2164
2165static void
2166slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2167{
2168 HV *coro_hv = (HV *)SvRV (coro_current);
2169
2170 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2171 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2172}
2173
2174static void
2175slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 HV *coro_hv;
2178 struct coro *coro;
2179
2180 if (items <= 0)
2181 croak ("Coro::cancel called without coro object,");
2182
2183 coro = SvSTATE (arg [0]);
2184 coro_hv = coro->hv;
2185
2186 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2187
2188 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2189 {
2190 /* coro currently busy cancelling something, so just notify it */
2191 coro->slf_frame.data = (void *)coro;
2192
2193 frame->prepare = prepare_nop;
2194 frame->check = slf_check_nop;
2195 }
2196 else if (coro_hv == (HV *)SvRV (coro_current))
2197 {
2198 /* cancelling the current coro is allowed, and equals terminate */
2199 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2200 }
2201 else
2202 {
2203 struct coro *self = SvSTATE_current;
2204
2205 /* otherwise we cancel directly, purely for speed reasons
2206 * unfortunately, this requires some magic trickery, as
2207 * somebody else could cancel us, so we have to fight the cancellation.
2208 * this is ugly, and hopefully fully worth the extra speed.
2209 * besides, I can't get the slow-but-safe version working...
2210 */
2211 slf_frame.data = 0;
2212 self->flags |= CF_NOCANCEL;
2213 coro_state_destroy (aTHX_ coro);
2214 self->flags &= ~CF_NOCANCEL;
2215
2216 if (slf_frame.data)
2217 {
2218 /* while we were busy we have been cancelled, so terminate */
2219 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2220 }
2221 else
2222 {
2223 frame->prepare = prepare_nop;
2224 frame->check = slf_check_nop;
2225 }
2226 }
2227}
2228
2229static int
2230slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2231{
2232 frame->prepare = 0;
2233 coro_unwind_stacks (aTHX);
2234
2235 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2236
2237 return 1;
2238}
2239
2240static int
2241safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2242{
2243 if (coro->cctx)
2244 croak ("coro inside C callback, unable to cancel at this time, caught");
2245
2246 if (coro->flags & CF_NEW)
2247 {
2248 coro_set_status (aTHX_ coro, arg, items);
2249 coro_state_destroy (aTHX_ coro);
2250 }
2251 else
2252 {
2253 if (!coro->slf_frame.prepare)
2254 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2255
2256 slf_destroy (aTHX_ coro);
2257
2258 coro_set_status (aTHX_ coro, arg, items);
2259 coro->slf_frame.prepare = prepare_nop;
2260 coro->slf_frame.check = slf_check_safe_cancel;
2261
2262 api_ready (aTHX_ (SV *)coro->hv);
2263 }
2264
2265 return 1;
2266}
2267
2268/*****************************************************************************/
2269/* async pool handler */
2270
2271static int
2272slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2273{
2274 HV *hv = (HV *)SvRV (coro_current);
2275 struct coro *coro = (struct coro *)frame->data;
2276
2277 if (!coro->invoke_cb)
2278 return 1; /* loop till we have invoke */
2279 else
2280 {
2281 hv_store (hv, "desc", sizeof ("desc") - 1,
2282 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2283
2284 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2285
2286 {
2287 dSP;
2288 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2289 PUTBACK;
2290 }
2291
2292 SvREFCNT_dec (GvAV (PL_defgv));
2293 GvAV (PL_defgv) = coro->invoke_av;
2294 coro->invoke_av = 0;
2295
2296 return 0;
2297 }
2298}
2299
2300static void
2301slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2302{
2303 HV *hv = (HV *)SvRV (coro_current);
2304 struct coro *coro = SvSTATE_hv ((SV *)hv);
2305
2306 if (ecb_expect_true (coro->saved_deffh))
2307 {
2308 /* subsequent iteration */
2309 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2310 coro->saved_deffh = 0;
2311
2312 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2313 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2314 {
2315 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2316 return;
2317 }
2318 else
2319 {
2320 av_clear (GvAV (PL_defgv));
2321 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2322
2323 coro->prio = 0;
2324
2325 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2326 api_trace (aTHX_ coro_current, 0);
2327
2328 frame->prepare = prepare_schedule;
2329 av_push (av_async_pool, SvREFCNT_inc (hv));
2330 }
2331 }
2332 else
2333 {
2334 /* first iteration, simply fall through */
2335 frame->prepare = prepare_nop;
2336 }
2337
2338 frame->check = slf_check_pool_handler;
2339 frame->data = (void *)coro;
2340}
2341
2342/*****************************************************************************/
2343/* rouse callback */
2344
2345#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2346
2347static void
2348coro_rouse_callback (pTHX_ CV *cv)
2349{
2350 dXSARGS;
2351 SV *data = (SV *)S_GENSUB_ARG;
2352
2353 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2354 {
2355 /* first call, set args */
2356 SV *coro = SvRV (data);
2357 AV *av = newAV ();
2358
2359 SvRV_set (data, (SV *)av);
2360
2361 /* better take a full copy of the arguments */
2362 while (items--)
2363 av_store (av, items, newSVsv (ST (items)));
2364
2365 api_ready (aTHX_ coro);
2366 SvREFCNT_dec (coro);
2367 }
2368
2369 XSRETURN_EMPTY;
2370}
2371
2372static int
2373slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2374{
2375 SV *data = (SV *)frame->data;
2376
2377 if (CORO_THROW)
2378 return 0;
2379
2380 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2381 return 1;
2382
2383 /* now push all results on the stack */
2384 {
2385 dSP;
2386 AV *av = (AV *)SvRV (data);
2387 int i;
2388
2389 EXTEND (SP, AvFILLp (av) + 1);
2390 for (i = 0; i <= AvFILLp (av); ++i)
2391 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2392
2393 /* we have stolen the elements, so set length to zero and free */
2394 AvFILLp (av) = -1;
2395 av_undef (av);
2396
2397 PUTBACK;
2398 }
2399
2400 return 0;
2401}
2402
2403static void
2404slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 SV *cb;
2407
2408 if (items)
2409 cb = arg [0];
2410 else
2411 {
2412 struct coro *coro = SvSTATE_current;
2413
2414 if (!coro->rouse_cb)
2415 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2416
2417 cb = sv_2mortal (coro->rouse_cb);
2418 coro->rouse_cb = 0;
2419 }
2420
2421 if (!SvROK (cb)
2422 || SvTYPE (SvRV (cb)) != SVt_PVCV
2423 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2424 croak ("Coro::rouse_wait called with illegal callback argument,");
2425
2426 {
2427 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2428 SV *data = (SV *)S_GENSUB_ARG;
2429
2430 frame->data = (void *)data;
2431 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2432 frame->check = slf_check_rouse_wait;
2433 }
2434}
2435
2436static SV *
2437coro_new_rouse_cb (pTHX)
2438{
2439 HV *hv = (HV *)SvRV (coro_current);
2440 struct coro *coro = SvSTATE_hv (hv);
2441 SV *data = newRV_inc ((SV *)hv);
2442 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2443
2444 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2445 SvREFCNT_dec (data); /* magicext increases the refcount */
2446
2447 SvREFCNT_dec (coro->rouse_cb);
2448 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2449
2450 return cb;
2451}
2452
2453/*****************************************************************************/
2454/* schedule-like-function opcode (SLF) */
2455
2456static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2457static const CV *slf_cv;
2458static SV **slf_argv;
2459static int slf_argc, slf_arga; /* count, allocated */
2460static I32 slf_ax; /* top of stack, for restore */
2461
2462/* this restores the stack in the case we patched the entersub, to */
2463/* recreate the stack frame as perl will on following calls */
2464/* since entersub cleared the stack */
2465static OP *
2466pp_restore (pTHX)
2467{
2468 int i;
2469 SV **SP = PL_stack_base + slf_ax;
2470
2471 PUSHMARK (SP);
2472
2473 EXTEND (SP, slf_argc + 1);
2474
2475 for (i = 0; i < slf_argc; ++i)
2476 PUSHs (sv_2mortal (slf_argv [i]));
2477
2478 PUSHs ((SV *)CvGV (slf_cv));
2479
2480 RETURNOP (slf_restore.op_first);
2481}
2482
2483static void
2484slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2485{
2486 SV **arg = (SV **)slf_frame.data;
2487
2488 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2489}
2490
2491static void
2492slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2493{
2494 if (items != 2)
2495 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2496
2497 frame->prepare = slf_prepare_transfer;
2498 frame->check = slf_check_nop;
2499 frame->data = (void *)arg; /* let's hope it will stay valid */
2500}
2501
2502static void
2503slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2504{
2505 frame->prepare = prepare_schedule;
2506 frame->check = slf_check_nop;
2507}
2508
2509static void
2510slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2511{
2512 struct coro *next = (struct coro *)slf_frame.data;
2513
2514 SvREFCNT_inc_NN (next->hv);
2515 prepare_schedule_to (aTHX_ ta, next);
2516}
2517
2518static void
2519slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 if (!items)
2522 croak ("Coro::schedule_to expects a coroutine argument, caught");
2523
2524 frame->data = (void *)SvSTATE (arg [0]);
2525 frame->prepare = slf_prepare_schedule_to;
2526 frame->check = slf_check_nop;
2527}
2528
2529static void
2530slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 api_ready (aTHX_ SvRV (coro_current));
2533
2534 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2535}
2536
2537static void
2538slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2539{
2540 frame->prepare = prepare_cede;
2541 frame->check = slf_check_nop;
2542}
2543
2544static void
2545slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 frame->prepare = prepare_cede_notself;
2548 frame->check = slf_check_nop;
2549}
2550
2551/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2552static void
2553slf_destroy (pTHX_ struct coro *coro)
2554{
2555 /* this callback is reserved for slf functions needing to do cleanup */
2556 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2557 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2558
2559 /*
2560 * The on_destroy above most likely is from an SLF call.
2561 * Since by definition the SLF call will not finish when we destroy
2562 * the coro, we will have to force-finish it here, otherwise
2563 * cleanup functions cannot call SLF functions.
2564 */
2565 coro->slf_frame.prepare = 0;
2566}
2567
2568/*
2569 * these not obviously related functions are all rolled into one
2570 * function to increase chances that they all will call transfer with the same
2571 * stack offset
2572 * SLF stands for "schedule-like-function".
2573 */
2574static OP *
2575pp_slf (pTHX)
2576{
2577 I32 checkmark; /* mark SP to see how many elements check has pushed */
2578
2579 /* set up the slf frame, unless it has already been set-up */
2580 /* the latter happens when a new coro has been started */
2581 /* or when a new cctx was attached to an existing coroutine */
2582 if (ecb_expect_true (!slf_frame.prepare))
2583 {
2584 /* first iteration */
2585 dSP;
2586 SV **arg = PL_stack_base + TOPMARK + 1;
2587 int items = SP - arg; /* args without function object */
2588 SV *gv = *sp;
2589
2590 /* do a quick consistency check on the "function" object, and if it isn't */
2591 /* for us, divert to the real entersub */
2592 if (SvTYPE (gv) != SVt_PVGV
2593 || !GvCV (gv)
2594 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2595 return PL_ppaddr[OP_ENTERSUB](aTHX);
2596
2597 if (!(PL_op->op_flags & OPf_STACKED))
2598 {
2599 /* ampersand-form of call, use @_ instead of stack */
2600 AV *av = GvAV (PL_defgv);
2601 arg = AvARRAY (av);
2602 items = AvFILLp (av) + 1;
2603 }
2604
2605 /* now call the init function, which needs to set up slf_frame */
2606 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2607 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2608
2609 /* pop args */
2610 SP = PL_stack_base + POPMARK;
2611
2612 PUTBACK;
2613 }
2614
2615 /* now that we have a slf_frame, interpret it! */
2616 /* we use a callback system not to make the code needlessly */
2617 /* complicated, but so we can run multiple perl coros from one cctx */
2618
2619 do
2620 {
2621 struct coro_transfer_args ta;
2622
2623 slf_frame.prepare (aTHX_ &ta);
2624 TRANSFER (ta, 0);
2625
2626 checkmark = PL_stack_sp - PL_stack_base;
2627 }
2628 while (slf_frame.check (aTHX_ &slf_frame));
2629
2630 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2631
2632 /* exception handling */
2633 if (ecb_expect_false (CORO_THROW))
2634 {
2635 SV *exception = sv_2mortal (CORO_THROW);
2636
2637 CORO_THROW = 0;
2638 sv_setsv (ERRSV, exception);
2639 croak (0);
2640 }
2641
2642 /* return value handling - mostly like entersub */
2643 /* make sure we put something on the stack in scalar context */
2644 if (GIMME_V == G_SCALAR
2645 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2646 {
2647 dSP;
2648 SV **bot = PL_stack_base + checkmark;
2649
2650 if (sp == bot) /* too few, push undef */
2651 bot [1] = &PL_sv_undef;
2652 else /* too many, take last one */
2653 bot [1] = *sp;
2654
2655 SP = bot + 1;
2656
2657 PUTBACK;
2658 }
2659
2660 return NORMAL;
2661}
2662
2663static void
2664api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2665{
2666 int i;
2667 SV **arg = PL_stack_base + ax;
2668 int items = PL_stack_sp - arg + 1;
2669
2670 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2671
2672 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2673 && PL_op->op_ppaddr != pp_slf)
2674 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2675
2676 CvFLAGS (cv) |= CVf_SLF;
2677 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2678 slf_cv = cv;
2679
2680 /* we patch the op, and then re-run the whole call */
2681 /* we have to put the same argument on the stack for this to work */
2682 /* and this will be done by pp_restore */
2683 slf_restore.op_next = (OP *)&slf_restore;
2684 slf_restore.op_type = OP_CUSTOM;
2685 slf_restore.op_ppaddr = pp_restore;
2686 slf_restore.op_first = PL_op;
2687
2688 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2689
2690 if (PL_op->op_flags & OPf_STACKED)
2691 {
2692 if (items > slf_arga)
2693 {
2694 slf_arga = items;
2695 Safefree (slf_argv);
2696 New (0, slf_argv, slf_arga, SV *);
2697 }
2698
2699 slf_argc = items;
2700
2701 for (i = 0; i < items; ++i)
2702 slf_argv [i] = SvREFCNT_inc (arg [i]);
2703 }
2704 else
2705 slf_argc = 0;
2706
2707 PL_op->op_ppaddr = pp_slf;
2708 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2709
2710 PL_op = (OP *)&slf_restore;
2711}
2712
2713/*****************************************************************************/
2714/* dynamic wind */
2715
2716static void
2717on_enterleave_call (pTHX_ SV *cb)
2718{
2719 dSP;
2720
2721 PUSHSTACK;
2722
2723 PUSHMARK (SP);
2724 PUTBACK;
2725 call_sv (cb, G_VOID | G_DISCARD);
2726 SPAGAIN;
2727
2728 POPSTACK;
2729}
2730
2731static SV *
2732coro_avp_pop_and_free (pTHX_ AV **avp)
2733{
2734 AV *av = *avp;
2735 SV *res = av_pop (av);
2736
2737 if (AvFILLp (av) < 0)
2738 {
2739 *avp = 0;
2740 SvREFCNT_dec (av);
2741 }
2742
2743 return res;
2744}
2745
2746static void
2747coro_pop_on_enter (pTHX_ void *coro)
2748{
2749 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2750 SvREFCNT_dec (cb);
2751}
2752
2753static void
2754coro_pop_on_leave (pTHX_ void *coro)
2755{
2756 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2757 on_enterleave_call (aTHX_ sv_2mortal (cb));
2758}
2759
2760/*****************************************************************************/
2761/* PerlIO::cede */
2762
2763typedef struct
2764{
2765 PerlIOBuf base;
2766 NV next, every;
2767} PerlIOCede;
2768
2769static IV ecb_cold
2770PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2771{
2772 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2773
2774 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2775 self->next = nvtime () + self->every;
2776
2777 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2778}
2779
2780static SV * ecb_cold
2781PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2782{
2783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2784
2785 return newSVnv (self->every);
2786}
2787
2788static IV
2789PerlIOCede_flush (pTHX_ PerlIO *f)
2790{
2791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2792 double now = nvtime ();
2793
2794 if (now >= self->next)
2795 {
2796 api_cede (aTHX);
2797 self->next = now + self->every;
2798 }
2799
2800 return PerlIOBuf_flush (aTHX_ f);
2801}
2802
2803static PerlIO_funcs PerlIO_cede =
2804{
2805 sizeof(PerlIO_funcs),
2806 "cede",
2807 sizeof(PerlIOCede),
2808 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2809 PerlIOCede_pushed,
2810 PerlIOBuf_popped,
2811 PerlIOBuf_open,
2812 PerlIOBase_binmode,
2813 PerlIOCede_getarg,
2814 PerlIOBase_fileno,
2815 PerlIOBuf_dup,
2816 PerlIOBuf_read,
2817 PerlIOBuf_unread,
2818 PerlIOBuf_write,
2819 PerlIOBuf_seek,
2820 PerlIOBuf_tell,
2821 PerlIOBuf_close,
2822 PerlIOCede_flush,
2823 PerlIOBuf_fill,
2824 PerlIOBase_eof,
2825 PerlIOBase_error,
2826 PerlIOBase_clearerr,
2827 PerlIOBase_setlinebuf,
2828 PerlIOBuf_get_base,
2829 PerlIOBuf_bufsiz,
2830 PerlIOBuf_get_ptr,
2831 PerlIOBuf_get_cnt,
2832 PerlIOBuf_set_ptrcnt,
2833};
2834
2835/*****************************************************************************/
2836/* Coro::Semaphore & Coro::Signal */
2837
2838static SV *
2839coro_waitarray_new (pTHX_ int count)
2840{
2841 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2842 AV *av = newAV ();
2843 SV **ary;
2844
2845 /* unfortunately, building manually saves memory */
2846 Newx (ary, 2, SV *);
2847 AvALLOC (av) = ary;
2848#if PERL_VERSION_ATLEAST (5,10,0)
2849 AvARRAY (av) = ary;
2850#else
2851 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2852 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2853 SvPVX ((SV *)av) = (char *)ary;
2854#endif
2855 AvMAX (av) = 1;
2856 AvFILLp (av) = 0;
2857 ary [0] = newSViv (count);
2858
2859 return newRV_noinc ((SV *)av);
2860}
2861
2862/* semaphore */
2863
2864static void
2865coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2866{
2867 SV *count_sv = AvARRAY (av)[0];
2868 IV count = SvIVX (count_sv);
2869
2870 count += adjust;
2871 SvIVX (count_sv) = count;
2872
2873 /* now wake up as many waiters as are expected to lock */
2874 while (count > 0 && AvFILLp (av) > 0)
2875 {
2876 SV *cb;
2877
2878 /* swap first two elements so we can shift a waiter */
2879 AvARRAY (av)[0] = AvARRAY (av)[1];
2880 AvARRAY (av)[1] = count_sv;
2881 cb = av_shift (av);
2882
2883 if (SvOBJECT (cb))
2884 {
2885 api_ready (aTHX_ cb);
2886 --count;
2887 }
2888 else if (SvTYPE (cb) == SVt_PVCV)
2889 {
2890 dSP;
2891 PUSHMARK (SP);
2892 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2893 PUTBACK;
2894 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2895 }
2896
2897 SvREFCNT_dec (cb);
2898 }
2899}
2900
2901static void
2902coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2903{
2904 /* call $sem->adjust (0) to possibly wake up some other waiters */
2905 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2906}
2907
2908static int
2909slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2910{
2911 AV *av = (AV *)frame->data;
2912 SV *count_sv = AvARRAY (av)[0];
2913 SV *coro_hv = SvRV (coro_current);
2914
2915 /* if we are about to throw, don't actually acquire the lock, just throw */
2916 if (CORO_THROW)
2917 return 0;
2918 else if (SvIVX (count_sv) > 0)
2919 {
2920 frame->destroy = 0;
2921
2922 if (acquire)
2923 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2924 else
2925 coro_semaphore_adjust (aTHX_ av, 0);
2926
2927 return 0;
2928 }
2929 else
2930 {
2931 int i;
2932 /* if we were woken up but can't down, we look through the whole */
2933 /* waiters list and only add us if we aren't in there already */
2934 /* this avoids some degenerate memory usage cases */
2935 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2936 if (AvARRAY (av)[i] == coro_hv)
2937 return 1;
2938
2939 av_push (av, SvREFCNT_inc (coro_hv));
2940 return 1;
2941 }
2942}
2943
2944static int
2945slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2946{
2947 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2948}
2949
2950static int
2951slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2952{
2953 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2954}
2955
2956static void
2957slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2958{
2959 AV *av = (AV *)SvRV (arg [0]);
2960
2961 if (SvIVX (AvARRAY (av)[0]) > 0)
2962 {
2963 frame->data = (void *)av;
2964 frame->prepare = prepare_nop;
2965 }
2966 else
2967 {
2968 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2969
2970 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2971 frame->prepare = prepare_schedule;
2972 /* to avoid race conditions when a woken-up coro gets terminated */
2973 /* we arrange for a temporary on_destroy that calls adjust (0) */
2974 frame->destroy = coro_semaphore_destroy;
2975 }
2976}
2977
2978static void
2979slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2980{
2981 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2982 frame->check = slf_check_semaphore_down;
2983}
2984
2985static void
2986slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2987{
2988 if (items >= 2)
2989 {
2990 /* callback form */
2991 AV *av = (AV *)SvRV (arg [0]);
2992 SV *cb_cv = s_get_cv_croak (arg [1]);
2993
2994 av_push (av, SvREFCNT_inc_NN (cb_cv));
2995
2996 if (SvIVX (AvARRAY (av)[0]) > 0)
2997 coro_semaphore_adjust (aTHX_ av, 0);
2998
2999 frame->prepare = prepare_nop;
3000 frame->check = slf_check_nop;
3001 }
3002 else
3003 {
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_wait;
3006 }
3007}
3008
3009/* signal */
3010
3011static void
3012coro_signal_wake (pTHX_ AV *av, int count)
3013{
3014 SvIVX (AvARRAY (av)[0]) = 0;
3015
3016 /* now signal count waiters */
3017 while (count > 0 && AvFILLp (av) > 0)
3018 {
3019 SV *cb;
3020
3021 /* swap first two elements so we can shift a waiter */
3022 cb = AvARRAY (av)[0];
3023 AvARRAY (av)[0] = AvARRAY (av)[1];
3024 AvARRAY (av)[1] = cb;
3025
3026 cb = av_shift (av);
3027
3028 if (SvTYPE (cb) == SVt_PVCV)
3029 {
3030 dSP;
3031 PUSHMARK (SP);
3032 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3033 PUTBACK;
3034 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3035 }
3036 else
3037 {
3038 api_ready (aTHX_ cb);
3039 sv_setiv (cb, 0); /* signal waiter */
3040 }
3041
3042 SvREFCNT_dec (cb);
3043
3044 --count;
3045 }
3046}
3047
3048static int
3049slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3050{
3051 /* if we are about to throw, also stop waiting */
3052 return SvROK ((SV *)frame->data) && !CORO_THROW;
3053}
3054
3055static void
3056slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3057{
3058 AV *av = (AV *)SvRV (arg [0]);
3059
3060 if (items >= 2)
3061 {
3062 SV *cb_cv = s_get_cv_croak (arg [1]);
3063 av_push (av, SvREFCNT_inc_NN (cb_cv));
3064
3065 if (SvIVX (AvARRAY (av)[0]))
3066 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3067
3068 frame->prepare = prepare_nop;
3069 frame->check = slf_check_nop;
3070 }
3071 else if (SvIVX (AvARRAY (av)[0]))
3072 {
3073 SvIVX (AvARRAY (av)[0]) = 0;
3074 frame->prepare = prepare_nop;
3075 frame->check = slf_check_nop;
3076 }
3077 else
3078 {
3079 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3080
3081 av_push (av, waiter);
3082
3083 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3084 frame->prepare = prepare_schedule;
3085 frame->check = slf_check_signal_wait;
3086 }
3087}
3088
3089/*****************************************************************************/
3090/* Coro::AIO */
3091
3092#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3093
3094/* helper storage struct */
3095struct io_state
3096{
3097 int errorno;
3098 I32 laststype; /* U16 in 5.10.0 */
3099 int laststatval;
3100 Stat_t statcache;
3101};
3102
3103static void
3104coro_aio_callback (pTHX_ CV *cv)
3105{
3106 dXSARGS;
3107 AV *state = (AV *)S_GENSUB_ARG;
3108 SV *coro = av_pop (state);
3109 SV *data_sv = newSV (sizeof (struct io_state));
3110
3111 av_extend (state, items - 1);
3112
3113 sv_upgrade (data_sv, SVt_PV);
3114 SvCUR_set (data_sv, sizeof (struct io_state));
3115 SvPOK_only (data_sv);
3116
3117 {
3118 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3119
3120 data->errorno = errno;
3121 data->laststype = PL_laststype;
3122 data->laststatval = PL_laststatval;
3123 data->statcache = PL_statcache;
3124 }
3125
3126 /* now build the result vector out of all the parameters and the data_sv */
3127 {
3128 int i;
3129
3130 for (i = 0; i < items; ++i)
3131 av_push (state, SvREFCNT_inc_NN (ST (i)));
3132 }
3133
3134 av_push (state, data_sv);
3135
3136 api_ready (aTHX_ coro);
3137 SvREFCNT_dec (coro);
3138 SvREFCNT_dec ((AV *)state);
3139}
3140
3141static int
3142slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3143{
3144 AV *state = (AV *)frame->data;
3145
3146 /* if we are about to throw, return early */
3147 /* this does not cancel the aio request, but at least */
3148 /* it quickly returns */
3149 if (CORO_THROW)
3150 return 0;
3151
3152 /* one element that is an RV? repeat! */
3153 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3154 return 1;
3155
3156 /* restore status */
3157 {
3158 SV *data_sv = av_pop (state);
3159 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3160
3161 errno = data->errorno;
3162 PL_laststype = data->laststype;
3163 PL_laststatval = data->laststatval;
3164 PL_statcache = data->statcache;
3165
3166 SvREFCNT_dec (data_sv);
3167 }
3168
3169 /* push result values */
3170 {
3171 dSP;
3172 int i;
3173
3174 EXTEND (SP, AvFILLp (state) + 1);
3175 for (i = 0; i <= AvFILLp (state); ++i)
3176 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3177
3178 PUTBACK;
3179 }
3180
3181 return 0;
3182}
3183
3184static void
3185slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3186{
3187 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3188 SV *coro_hv = SvRV (coro_current);
3189 struct coro *coro = SvSTATE_hv (coro_hv);
3190
3191 /* put our coroutine id on the state arg */
3192 av_push (state, SvREFCNT_inc_NN (coro_hv));
3193
3194 /* first see whether we have a non-zero priority and set it as AIO prio */
3195 if (coro->prio)
3196 {
3197 dSP;
3198
3199 static SV *prio_cv;
3200 static SV *prio_sv;
3201
3202 if (ecb_expect_false (!prio_cv))
3203 {
3204 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3205 prio_sv = newSViv (0);
3206 }
3207
3208 PUSHMARK (SP);
3209 sv_setiv (prio_sv, coro->prio);
3210 XPUSHs (prio_sv);
3211
3212 PUTBACK;
3213 call_sv (prio_cv, G_VOID | G_DISCARD);
3214 }
3215
3216 /* now call the original request */
3217 {
3218 dSP;
3219 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3220 int i;
3221
3222 PUSHMARK (SP);
3223
3224 /* first push all args to the stack */
3225 EXTEND (SP, items + 1);
3226
3227 for (i = 0; i < items; ++i)
3228 PUSHs (arg [i]);
3229
3230 /* now push the callback closure */
3231 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3232
3233 /* now call the AIO function - we assume our request is uncancelable */
3234 PUTBACK;
3235 call_sv ((SV *)req, G_VOID | G_DISCARD);
3236 }
3237
3238 /* now that the request is going, we loop till we have a result */
3239 frame->data = (void *)state;
3240 frame->prepare = prepare_schedule;
3241 frame->check = slf_check_aio_req;
3242}
3243
3244static void
3245coro_aio_req_xs (pTHX_ CV *cv)
3246{
3247 dXSARGS;
3248
3249 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3250
3251 XSRETURN_EMPTY;
3252}
3253
3254/*****************************************************************************/
3255
3256#if CORO_CLONE
3257# include "clone.c"
3258#endif
3259
3260/*****************************************************************************/
3261
3262static SV *
3263coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3264{
3265 SV *coro_sv;
3266 struct coro *coro;
3267 MAGIC *mg;
3268 HV *hv;
3269 SV *cb;
3270 int i;
3271
3272 if (argc > 0)
3273 {
3274 cb = s_get_cv_croak (argv [0]);
3275
3276 if (!is_coro)
3277 {
3278 if (CvISXSUB (cb))
3279 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3280
3281 if (!CvROOT (cb))
3282 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3283 }
3284 }
3285
3286 Newz (0, coro, 1, struct coro);
3287 coro->args = newAV ();
3288 coro->flags = CF_NEW;
3289
3290 if (coro_first) coro_first->prev = coro;
3291 coro->next = coro_first;
3292 coro_first = coro;
3293
3294 coro->hv = hv = newHV ();
3295 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3296 mg->mg_flags |= MGf_DUP;
3297 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3298
3299 if (argc > 0)
3300 {
3301 av_extend (coro->args, argc + is_coro - 1);
3302
3303 if (is_coro)
3304 {
3305 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3306 cb = (SV *)cv_coro_run;
3307 }
3308
3309 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3310
3311 for (i = 1; i < argc; i++)
3312 av_push (coro->args, newSVsv (argv [i]));
3313 }
3314
3315 return coro_sv;
3316}
3317
3318#ifndef __cplusplus
3319ecb_cold XS(boot_Coro__State);
3320#endif
3321
3322#if CORO_JIT
3323
3324static void ecb_noinline ecb_cold
3325pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3326{
3327 dSP;
3328 AV *av = newAV ();
3329
3330 av_store (av, 3, newSVuv (d));
3331 av_store (av, 2, newSVuv (c));
3332 av_store (av, 1, newSVuv (b));
3333 av_store (av, 0, newSVuv (a));
3334
3335 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3336
3337 PUTBACK;
3338}
3339
3340static void ecb_noinline ecb_cold
3341jit_init (pTHX)
3342{
3343 dSP;
3344 SV *load, *save;
3345 char *map_base;
3346 char *load_ptr, *save_ptr;
3347 STRLEN load_len, save_len, map_len;
3348 int count;
3349
3350 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3351
3352 PUSHMARK (SP);
3353 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3354 #include "state.h"
3355 count = call_pv ("Coro::State::_jit", G_ARRAY);
3356 SPAGAIN;
3357
3358 save = POPs; save_ptr = SvPVbyte (save, save_len);
3359 load = POPs; load_ptr = SvPVbyte (load, load_len);
3360
3361 map_len = load_len + save_len + 16;
3362
3363 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3364
3365 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3366
3367 load_perl_slots = (load_save_perl_slots_type)map_base;
3368 memcpy (map_base, load_ptr, load_len);
3369
3370 map_base += (load_len + 15) & ~15;
3371
3372 save_perl_slots = (load_save_perl_slots_type)map_base;
3373 memcpy (map_base, save_ptr, save_len);
3374
3375 /* we are good citizens and try to make the page read-only, so the evil evil */
3376 /* hackers might have it a bit more difficult */
3377 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3378
3379 PUTBACK;
3380 eval_pv ("undef &Coro::State::_jit", 1);
3381}
3382
3383#endif
3384
1515MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3385MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1516 3386
1517PROTOTYPES: DISABLE 3387PROTOTYPES: DISABLE
1518 3388
1519BOOT: 3389BOOT:
1520{ 3390{
1521#ifdef USE_ITHREADS 3391#ifdef USE_ITHREADS
1522 MUTEX_INIT (&coro_mutex); 3392# if CORO_PTHREAD
3393 coro_thx = PERL_GET_CONTEXT;
3394# endif
1523#endif 3395#endif
1524 BOOT_PAGESIZE; 3396 /* perl defines these to check for existance first, but why it doesn't */
3397 /* just create them one at init time is not clear to me, except for */
3398 /* programs trying to delete them, but... */
3399 /* anyway, we declare this as invalid and make sure they are initialised here */
3400 DEFSV;
3401 ERRSV;
3402
3403 cctx_current = cctx_new_empty ();
1525 3404
1526 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3405 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1527 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3406 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1528 3407
3408 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3409 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3410 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3411
1529 hv_sig = coro_get_hv ("SIG", TRUE); 3412 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1530 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE); 3413 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1531 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE); 3414 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1532
1533 if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
1534 if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
1535 3415
1536 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3416 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1537 3417
1538 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3418 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1539 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3419 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1544 main_top_env = PL_top_env; 3424 main_top_env = PL_top_env;
1545 3425
1546 while (main_top_env->je_prev) 3426 while (main_top_env->je_prev)
1547 main_top_env = main_top_env->je_prev; 3427 main_top_env = main_top_env->je_prev;
1548 3428
3429 {
3430 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3431
3432 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3433 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3434
3435 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3436 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3437 }
3438
1549 coroapi.ver = CORO_API_VERSION; 3439 coroapi.ver = CORO_API_VERSION;
1550 coroapi.rev = CORO_API_REVISION; 3440 coroapi.rev = CORO_API_REVISION;
3441
1551 coroapi.transfer = api_transfer; 3442 coroapi.transfer = api_transfer;
1552 3443
3444 coroapi.sv_state = SvSTATE_;
3445 coroapi.execute_slf = api_execute_slf;
3446 coroapi.prepare_nop = prepare_nop;
3447 coroapi.prepare_schedule = prepare_schedule;
3448 coroapi.prepare_cede = prepare_cede;
3449 coroapi.prepare_cede_notself = prepare_cede_notself;
3450
3451 time_init (aTHX);
3452
1553 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3453 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3454#if CORO_JIT
3455 PUTBACK;
3456 jit_init (aTHX);
3457 SPAGAIN;
3458#endif
1554} 3459}
1555 3460
1556SV * 3461SV *
1557new (char *klass, ...) 3462new (SV *klass, ...)
3463 ALIAS:
3464 Coro::new = 1
1558 CODE: 3465 CODE:
1559{ 3466 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1560 struct coro *coro;
1561 HV *hv;
1562 int i;
1563
1564 Newz (0, coro, 1, struct coro);
1565 coro->args = newAV ();
1566 coro->flags = CF_NEW;
1567
1568 if (coro_first) coro_first->prev = coro;
1569 coro->next = coro_first;
1570 coro_first = coro;
1571
1572 coro->hv = hv = newHV ();
1573 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1574 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1575
1576 av_extend (coro->args, items - 1);
1577 for (i = 1; i < items; i++)
1578 av_push (coro->args, newSVsv (ST (i)));
1579}
1580 OUTPUT:
1581 RETVAL
1582
1583# these not obviously related functions are all rolled into the same xs
1584# function to increase chances that they all will call transfer with the same
1585# stack offset
1586void
1587_set_stacklevel (...)
1588 ALIAS:
1589 Coro::State::transfer = 1
1590 Coro::schedule = 2
1591 Coro::cede = 3
1592 Coro::cede_notself = 4
1593 CODE:
1594{
1595 struct transfer_args ta;
1596
1597 switch (ix)
1598 {
1599 case 0:
1600 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1601 ta.next = 0;
1602 break;
1603
1604 case 1:
1605 if (items != 2)
1606 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1607
1608 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1609 break;
1610
1611 case 2:
1612 prepare_schedule (aTHX_ &ta);
1613 break;
1614
1615 case 3:
1616 prepare_cede (aTHX_ &ta);
1617 break;
1618
1619 case 4:
1620 if (!prepare_cede_notself (aTHX_ &ta))
1621 XSRETURN_EMPTY;
1622
1623 break;
1624 }
1625
1626 BARRIER;
1627 PUTBACK;
1628 TRANSFER (ta);
1629 SPAGAIN; /* might be the sp of a different coroutine now */
1630 /* be extra careful not to ever do anything after TRANSFER */
1631}
1632
1633bool
1634_destroy (SV *coro_sv)
1635 CODE:
1636 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1637 OUTPUT: 3467 OUTPUT:
1638 RETVAL 3468 RETVAL
1639 3469
1640void 3470void
3471transfer (...)
3472 PROTOTYPE: $$
3473 CODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3475
3476void
1641_exit (code) 3477_exit (int code)
1642 int code
1643 PROTOTYPE: $ 3478 PROTOTYPE: $
1644 CODE: 3479 CODE:
1645 _exit (code); 3480 _exit (code);
1646 3481
3482SV *
3483clone (Coro::State coro)
3484 CODE:
3485{
3486#if CORO_CLONE
3487 struct coro *ncoro = coro_clone (aTHX_ coro);
3488 MAGIC *mg;
3489 /* TODO: too much duplication */
3490 ncoro->hv = newHV ();
3491 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3492 mg->mg_flags |= MGf_DUP;
3493 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3494#else
3495 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3496#endif
3497}
3498 OUTPUT:
3499 RETVAL
3500
1647int 3501int
1648cctx_stacksize (int new_stacksize = 0) 3502cctx_stacksize (int new_stacksize = 0)
3503 PROTOTYPE: ;$
1649 CODE: 3504 CODE:
1650 RETVAL = coro_stacksize; 3505 RETVAL = cctx_stacksize;
1651 if (new_stacksize) 3506 if (new_stacksize)
3507 {
1652 coro_stacksize = new_stacksize; 3508 cctx_stacksize = new_stacksize;
3509 ++cctx_gen;
3510 }
1653 OUTPUT: 3511 OUTPUT:
1654 RETVAL 3512 RETVAL
1655 3513
1656int 3514int
3515cctx_max_idle (int max_idle = 0)
3516 PROTOTYPE: ;$
3517 CODE:
3518 RETVAL = cctx_max_idle;
3519 if (max_idle > 1)
3520 cctx_max_idle = max_idle;
3521 OUTPUT:
3522 RETVAL
3523
3524int
1657cctx_count () 3525cctx_count ()
3526 PROTOTYPE:
1658 CODE: 3527 CODE:
1659 RETVAL = cctx_count; 3528 RETVAL = cctx_count;
1660 OUTPUT: 3529 OUTPUT:
1661 RETVAL 3530 RETVAL
1662 3531
1663int 3532int
1664cctx_idle () 3533cctx_idle ()
3534 PROTOTYPE:
1665 CODE: 3535 CODE:
1666 RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2]; 3536 RETVAL = cctx_idle;
1667 OUTPUT: 3537 OUTPUT:
1668 RETVAL 3538 RETVAL
1669 3539
1670void 3540void
1671list () 3541list ()
3542 PROTOTYPE:
1672 PPCODE: 3543 PPCODE:
1673{ 3544{
1674 struct coro *coro; 3545 struct coro *coro;
1675 for (coro = coro_first; coro; coro = coro->next) 3546 for (coro = coro_first; coro; coro = coro->next)
1676 if (coro->hv) 3547 if (coro->hv)
1677 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3548 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1678} 3549}
1679 3550
… …
1681call (Coro::State coro, SV *coderef) 3552call (Coro::State coro, SV *coderef)
1682 ALIAS: 3553 ALIAS:
1683 eval = 1 3554 eval = 1
1684 CODE: 3555 CODE:
1685{ 3556{
1686 if (coro->mainstack) 3557 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1687 { 3558 {
1688 struct coro temp; 3559 struct coro *current = SvSTATE_current;
3560 struct CoroSLF slf_save;
1689 3561
1690 if (!(coro->flags & CF_RUNNING)) 3562 if (current != coro)
1691 { 3563 {
3564 PUTBACK;
1692 save_perl (aTHX_ &temp); 3565 save_perl (aTHX_ current);
1693 load_perl (aTHX_ coro); 3566 load_perl (aTHX_ coro);
3567 /* the coro is most likely in an active SLF call.
3568 * while not strictly required (the code we execute is
3569 * not allowed to call any SLF functions), it's cleaner
3570 * to reinitialise the slf_frame and restore it later.
3571 * This might one day allow us to actually do SLF calls
3572 * from code executed here.
3573 */
3574 slf_save = slf_frame;
3575 slf_frame.prepare = 0;
3576 SPAGAIN;
1694 } 3577 }
1695 3578
1696 {
1697 dSP;
1698 ENTER;
1699 SAVETMPS;
1700 PUTBACK;
1701 PUSHSTACK; 3579 PUSHSTACK;
3580
1702 PUSHMARK (SP); 3581 PUSHMARK (SP);
3582 PUTBACK;
1703 3583
1704 if (ix) 3584 if (ix)
1705 eval_sv (coderef, 0); 3585 eval_sv (coderef, 0);
1706 else 3586 else
1707 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3587 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1708 3588
1709 POPSTACK; 3589 POPSTACK;
1710 FREETMPS; 3590 SPAGAIN;
1711 LEAVE;
1712 PUTBACK;
1713 }
1714 3591
1715 if (!(coro->flags & CF_RUNNING)) 3592 if (current != coro)
1716 { 3593 {
3594 PUTBACK;
3595 slf_frame = slf_save;
1717 save_perl (aTHX_ coro); 3596 save_perl (aTHX_ coro);
1718 load_perl (aTHX_ &temp); 3597 load_perl (aTHX_ current);
3598 SPAGAIN;
1719 } 3599 }
1720 } 3600 }
1721} 3601}
1722 3602
1723SV * 3603SV *
… …
1725 PROTOTYPE: $ 3605 PROTOTYPE: $
1726 ALIAS: 3606 ALIAS:
1727 is_ready = CF_READY 3607 is_ready = CF_READY
1728 is_running = CF_RUNNING 3608 is_running = CF_RUNNING
1729 is_new = CF_NEW 3609 is_new = CF_NEW
1730 is_destroyed = CF_DESTROYED 3610 is_destroyed = CF_ZOMBIE
3611 is_zombie = CF_ZOMBIE
3612 is_suspended = CF_SUSPENDED
1731 CODE: 3613 CODE:
1732 RETVAL = boolSV (coro->flags & ix); 3614 RETVAL = boolSV (coro->flags & ix);
1733 OUTPUT: 3615 OUTPUT:
1734 RETVAL 3616 RETVAL
1735 3617
1736void 3618void
3619throw (SV *self, SV *exception = &PL_sv_undef)
3620 PROTOTYPE: $;$
3621 CODE:
3622{
3623 struct coro *coro = SvSTATE (self);
3624 struct coro *current = SvSTATE_current;
3625 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3626 SvREFCNT_dec (*exceptionp);
3627 SvGETMAGIC (exception);
3628 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3629
3630 api_ready (aTHX_ self);
3631}
3632
3633void
1737api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3634api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3635 PROTOTYPE: $;$
3636 C_ARGS: aTHX_ coro, flags
1738 3637
1739SV * 3638SV *
1740has_stack (Coro::State coro) 3639has_cctx (Coro::State coro)
1741 PROTOTYPE: $ 3640 PROTOTYPE: $
1742 CODE: 3641 CODE:
1743 RETVAL = boolSV (!!coro->cctx); 3642 /* maybe manage the running flag differently */
3643 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1744 OUTPUT: 3644 OUTPUT:
1745 RETVAL 3645 RETVAL
1746 3646
1747int 3647int
1748is_traced (Coro::State coro) 3648is_traced (Coro::State coro)
… …
1750 CODE: 3650 CODE:
1751 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3651 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1752 OUTPUT: 3652 OUTPUT:
1753 RETVAL 3653 RETVAL
1754 3654
1755IV 3655UV
1756rss (Coro::State coro) 3656rss (Coro::State coro)
1757 PROTOTYPE: $ 3657 PROTOTYPE: $
1758 ALIAS: 3658 ALIAS:
1759 usecount = 1 3659 usecount = 1
1760 CODE: 3660 CODE:
… …
1764 case 1: RETVAL = coro->usecount; break; 3664 case 1: RETVAL = coro->usecount; break;
1765 } 3665 }
1766 OUTPUT: 3666 OUTPUT:
1767 RETVAL 3667 RETVAL
1768 3668
3669void
3670force_cctx ()
3671 PROTOTYPE:
3672 CODE:
3673 cctx_current->idle_sp = 0;
3674
3675void
3676swap_defsv (Coro::State self)
3677 PROTOTYPE: $
3678 ALIAS:
3679 swap_defav = 1
3680 CODE:
3681 if (!self->slot)
3682 croak ("cannot swap state with coroutine that has no saved state,");
3683 else
3684 {
3685 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3686 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3687
3688 SV *tmp = *src; *src = *dst; *dst = tmp;
3689 }
3690
3691void
3692cancel (Coro::State self)
3693 CODE:
3694 coro_state_destroy (aTHX_ self);
3695
3696SV *
3697enable_times (int enabled = enable_times)
3698 CODE:
3699{
3700 RETVAL = boolSV (enable_times);
3701
3702 if (enabled != enable_times)
3703 {
3704 enable_times = enabled;
3705
3706 coro_times_update ();
3707 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3708 }
3709}
3710 OUTPUT:
3711 RETVAL
3712
3713void
3714times (Coro::State self)
3715 PPCODE:
3716{
3717 struct coro *current = SvSTATE (coro_current);
3718
3719 if (ecb_expect_false (current == self))
3720 {
3721 coro_times_update ();
3722 coro_times_add (SvSTATE (coro_current));
3723 }
3724
3725 EXTEND (SP, 2);
3726 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3727 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3728
3729 if (ecb_expect_false (current == self))
3730 coro_times_sub (SvSTATE (coro_current));
3731}
3732
3733void
3734swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3735 CODE:
3736{
3737 struct coro *current = SvSTATE_current;
3738
3739 if (current == coro)
3740 SWAP_SVS (current);
3741
3742 if (!coro->swap_sv)
3743 coro->swap_sv = newAV ();
3744
3745 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3746 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3747
3748 if (current == coro)
3749 SWAP_SVS (current);
3750}
3751
1769 3752
1770MODULE = Coro::State PACKAGE = Coro 3753MODULE = Coro::State PACKAGE = Coro
1771 3754
1772BOOT: 3755BOOT:
1773{ 3756{
1774 int i;
1775
1776 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE); 3757 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1777 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE); 3758 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3759 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3760 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1778 av_async_pool = coro_get_av ("Coro::async_pool", TRUE); 3761 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3762 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3763 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3764 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1779 3765
1780 coro_current = coro_get_sv ("Coro::current", FALSE); 3766 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1781 SvREADONLY_on (coro_current); 3767 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3768 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3769 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1782 3770
1783 coro_stash = gv_stashpv ("Coro", TRUE); 3771 coro_stash = gv_stashpv ("Coro", TRUE);
1784 3772
1785 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3773 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1786 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3774 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1787 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3775 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1788 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3776 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1789 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3777 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1790 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3778 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1791
1792 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1793 coro_ready[i] = newAV ();
1794 3779
1795 { 3780 {
1796 SV *sv = perl_get_sv ("Coro::API", TRUE); 3781 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1797 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1798 3782
1799 coroapi.schedule = api_schedule; 3783 coroapi.schedule = api_schedule;
3784 coroapi.schedule_to = api_schedule_to;
1800 coroapi.cede = api_cede; 3785 coroapi.cede = api_cede;
1801 coroapi.cede_notself = api_cede_notself; 3786 coroapi.cede_notself = api_cede_notself;
1802 coroapi.ready = api_ready; 3787 coroapi.ready = api_ready;
1803 coroapi.is_ready = api_is_ready; 3788 coroapi.is_ready = api_is_ready;
1804 coroapi.nready = &coro_nready; 3789 coroapi.nready = coro_nready;
1805 coroapi.current = coro_current; 3790 coroapi.current = coro_current;
1806 3791
1807 GCoroAPI = &coroapi; 3792 /*GCoroAPI = &coroapi;*/
1808 sv_setiv (sv, (IV)&coroapi); 3793 sv_setiv (sv, (IV)&coroapi);
1809 SvREADONLY_on (sv); 3794 SvREADONLY_on (sv);
1810 } 3795 }
1811} 3796}
3797
3798SV *
3799async (...)
3800 PROTOTYPE: &@
3801 CODE:
3802 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3803 api_ready (aTHX_ RETVAL);
3804 OUTPUT:
3805 RETVAL
3806
3807void
3808_destroy (Coro::State coro)
3809 CODE:
3810 /* used by the manager thread */
3811 coro_state_destroy (aTHX_ coro);
3812
3813void
3814on_destroy (Coro::State coro, SV *cb)
3815 CODE:
3816 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3817
3818void
3819join (...)
3820 CODE:
3821 CORO_EXECUTE_SLF_XS (slf_init_join);
3822
3823void
3824terminate (...)
3825 CODE:
3826 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3827
3828void
3829cancel (...)
3830 CODE:
3831 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3832
3833int
3834safe_cancel (Coro::State self, ...)
3835 C_ARGS: aTHX_ self, &ST (1), items - 1
3836
3837void
3838schedule (...)
3839 CODE:
3840 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3841
3842void
3843schedule_to (...)
3844 CODE:
3845 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3846
3847void
3848cede_to (...)
3849 CODE:
3850 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3851
3852void
3853cede (...)
3854 CODE:
3855 CORO_EXECUTE_SLF_XS (slf_init_cede);
3856
3857void
3858cede_notself (...)
3859 CODE:
3860 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1812 3861
1813void 3862void
1814_set_current (SV *current) 3863_set_current (SV *current)
1815 PROTOTYPE: $ 3864 PROTOTYPE: $
1816 CODE: 3865 CODE:
1817 SvREFCNT_dec (SvRV (coro_current)); 3866 SvREFCNT_dec (SvRV (coro_current));
1818 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3867 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3868
3869void
3870_set_readyhook (SV *hook)
3871 PROTOTYPE: $
3872 CODE:
3873 SvREFCNT_dec (coro_readyhook);
3874 SvGETMAGIC (hook);
3875 if (SvOK (hook))
3876 {
3877 coro_readyhook = newSVsv (hook);
3878 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3879 }
3880 else
3881 {
3882 coro_readyhook = 0;
3883 CORO_READYHOOK = 0;
3884 }
1819 3885
1820int 3886int
1821prio (Coro::State coro, int newprio = 0) 3887prio (Coro::State coro, int newprio = 0)
3888 PROTOTYPE: $;$
1822 ALIAS: 3889 ALIAS:
1823 nice = 1 3890 nice = 1
1824 CODE: 3891 CODE:
1825{ 3892{
1826 RETVAL = coro->prio; 3893 RETVAL = coro->prio;
… …
1828 if (items > 1) 3895 if (items > 1)
1829 { 3896 {
1830 if (ix) 3897 if (ix)
1831 newprio = coro->prio - newprio; 3898 newprio = coro->prio - newprio;
1832 3899
1833 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3900 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1834 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3901 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1835 3902
1836 coro->prio = newprio; 3903 coro->prio = newprio;
1837 } 3904 }
1838} 3905}
1839 OUTPUT: 3906 OUTPUT:
… …
1841 3908
1842SV * 3909SV *
1843ready (SV *self) 3910ready (SV *self)
1844 PROTOTYPE: $ 3911 PROTOTYPE: $
1845 CODE: 3912 CODE:
1846 RETVAL = boolSV (api_ready (self)); 3913 RETVAL = boolSV (api_ready (aTHX_ self));
1847 OUTPUT: 3914 OUTPUT:
1848 RETVAL 3915 RETVAL
1849 3916
1850int 3917int
1851nready (...) 3918nready (...)
… …
1854 RETVAL = coro_nready; 3921 RETVAL = coro_nready;
1855 OUTPUT: 3922 OUTPUT:
1856 RETVAL 3923 RETVAL
1857 3924
1858void 3925void
1859throw (Coro::State self, SV *throw = &PL_sv_undef) 3926suspend (Coro::State self)
1860 PROTOTYPE: $;$ 3927 PROTOTYPE: $
1861 CODE: 3928 CODE:
1862 SvREFCNT_dec (self->throw); 3929 self->flags |= CF_SUSPENDED;
1863 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1864 3930
1865# for async_pool speedup
1866void 3931void
1867_pool_1 (SV *cb) 3932resume (Coro::State self)
3933 PROTOTYPE: $
1868 CODE: 3934 CODE:
1869{ 3935 self->flags &= ~CF_SUSPENDED;
1870 struct coro *coro = SvSTATE (coro_current);
1871 HV *hv = (HV *)SvRV (coro_current);
1872 AV *defav = GvAV (PL_defgv);
1873 SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
1874 AV *invoke_av;
1875 int i, len;
1876 3936
1877 if (!invoke) 3937void
1878 croak ("\3async_pool terminate\2\n"); 3938_pool_handler (...)
3939 CODE:
3940 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1879 3941
1880 SvREFCNT_dec (coro->saved_deffh); 3942void
1881 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3943async_pool (SV *cv, ...)
3944 PROTOTYPE: &@
3945 PPCODE:
3946{
3947 HV *hv = (HV *)av_pop (av_async_pool);
3948 AV *av = newAV ();
3949 SV *cb = ST (0);
3950 int i;
1882 3951
1883 hv_store (hv, "desc", sizeof ("desc") - 1, 3952 av_extend (av, items - 2);
1884 newSVpvn (strpair ("[async_pool]")), 0); 3953 for (i = 1; i < items; ++i)
3954 av_push (av, SvREFCNT_inc_NN (ST (i)));
1885 3955
1886 invoke_av = (AV *)SvRV (invoke); 3956 if ((SV *)hv == &PL_sv_undef)
1887 len = av_len (invoke_av);
1888
1889 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1890
1891 if (len > 0)
1892 { 3957 {
1893 av_fill (defav, len - 1); 3958 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1894 for (i = 0; i < len; ++i) 3959 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1895 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3960 SvREFCNT_dec (sv);
1896 } 3961 }
1897 3962
3963 {
3964 struct coro *coro = SvSTATE_hv (hv);
3965
3966 assert (!coro->invoke_cb);
3967 assert (!coro->invoke_av);
3968 coro->invoke_cb = SvREFCNT_inc (cb);
3969 coro->invoke_av = av;
3970 }
3971
3972 api_ready (aTHX_ (SV *)hv);
3973
3974 if (GIMME_V != G_VOID)
3975 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3976 else
1898 SvREFCNT_dec (invoke); 3977 SvREFCNT_dec (hv);
1899} 3978}
1900 3979
1901void 3980SV *
1902_pool_2 (SV *cb) 3981rouse_cb ()
3982 PROTOTYPE:
1903 CODE: 3983 CODE:
1904{ 3984 RETVAL = coro_new_rouse_cb (aTHX);
1905 struct coro *coro = SvSTATE (coro_current);
1906
1907 sv_setsv (cb, &PL_sv_undef);
1908
1909 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1910 coro->saved_deffh = 0;
1911
1912 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1913 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1914 croak ("\3async_pool terminate\2\n");
1915
1916 av_clear (GvAV (PL_defgv));
1917 hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
1918 newSVpvn (strpair ("[async_pool idle]")), 0);
1919
1920 coro->prio = 0;
1921
1922 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1923 api_trace (coro_current, 0);
1924
1925 av_push (av_async_pool, newSVsv (coro_current));
1926}
1927
1928
1929MODULE = Coro::State PACKAGE = Coro::AIO
1930
1931SV *
1932_get_state ()
1933 CODE:
1934{
1935 struct io_state *data;
1936
1937 RETVAL = newSV (sizeof (struct io_state));
1938 data = (struct io_state *)SvPVX (RETVAL);
1939 SvCUR_set (RETVAL, sizeof (struct io_state));
1940 SvPOK_only (RETVAL);
1941
1942 data->errorno = errno;
1943 data->laststype = PL_laststype;
1944 data->laststatval = PL_laststatval;
1945 data->statcache = PL_statcache;
1946}
1947 OUTPUT: 3985 OUTPUT:
1948 RETVAL 3986 RETVAL
1949 3987
1950void 3988void
1951_set_state (char *data_) 3989rouse_wait (...)
3990 PROTOTYPE: ;$
3991 PPCODE:
3992 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3993
3994void
3995on_enter (SV *block)
3996 ALIAS:
3997 on_leave = 1
1952 PROTOTYPE: $ 3998 PROTOTYPE: &
1953 CODE: 3999 CODE:
1954{ 4000{
1955 struct io_state *data = (void *)data_; 4001 struct coro *coro = SvSTATE_current;
4002 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1956 4003
1957 errno = data->errorno; 4004 block = s_get_cv_croak (block);
1958 PL_laststype = data->laststype;
1959 PL_laststatval = data->laststatval;
1960 PL_statcache = data->statcache;
1961}
1962 4005
4006 if (!*avp)
4007 *avp = newAV ();
4008
4009 av_push (*avp, SvREFCNT_inc (block));
4010
4011 if (!ix)
4012 on_enterleave_call (aTHX_ block);
4013
4014 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4015 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4016 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4017}
4018
4019
4020MODULE = Coro::State PACKAGE = PerlIO::cede
4021
4022BOOT:
4023 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4024
4025
4026MODULE = Coro::State PACKAGE = Coro::Semaphore
4027
4028SV *
4029new (SV *klass, SV *count = 0)
4030 CODE:
4031{
4032 int semcnt = 1;
4033
4034 if (count)
4035 {
4036 SvGETMAGIC (count);
4037
4038 if (SvOK (count))
4039 semcnt = SvIV (count);
4040 }
4041
4042 RETVAL = sv_bless (
4043 coro_waitarray_new (aTHX_ semcnt),
4044 GvSTASH (CvGV (cv))
4045 );
4046}
4047 OUTPUT:
4048 RETVAL
4049
4050# helper for Coro::Channel and others
4051SV *
4052_alloc (int count)
4053 CODE:
4054 RETVAL = coro_waitarray_new (aTHX_ count);
4055 OUTPUT:
4056 RETVAL
4057
4058SV *
4059count (SV *self)
4060 CODE:
4061 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4062 OUTPUT:
4063 RETVAL
4064
4065void
4066up (SV *self, int adjust = 1)
4067 ALIAS:
4068 adjust = 1
4069 CODE:
4070 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4071
4072void
4073down (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4076
4077void
4078wait (...)
4079 CODE:
4080 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4081
4082void
4083try (SV *self)
4084 PPCODE:
4085{
4086 AV *av = (AV *)SvRV (self);
4087 SV *count_sv = AvARRAY (av)[0];
4088 IV count = SvIVX (count_sv);
4089
4090 if (count > 0)
4091 {
4092 --count;
4093 SvIVX (count_sv) = count;
4094 XSRETURN_YES;
4095 }
4096 else
4097 XSRETURN_NO;
4098}
4099
4100void
4101waiters (SV *self)
4102 PPCODE:
4103{
4104 AV *av = (AV *)SvRV (self);
4105 int wcount = AvFILLp (av) + 1 - 1;
4106
4107 if (GIMME_V == G_SCALAR)
4108 XPUSHs (sv_2mortal (newSViv (wcount)));
4109 else
4110 {
4111 int i;
4112 EXTEND (SP, wcount);
4113 for (i = 1; i <= wcount; ++i)
4114 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4115 }
4116}
4117
4118MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4119
4120void
4121_may_delete (SV *sem, int count, unsigned int extra_refs)
4122 PPCODE:
4123{
4124 AV *av = (AV *)SvRV (sem);
4125
4126 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4127 && AvFILLp (av) == 0 /* no waiters, just count */
4128 && SvIV (AvARRAY (av)[0]) == count)
4129 XSRETURN_YES;
4130
4131 XSRETURN_NO;
4132}
4133
4134MODULE = Coro::State PACKAGE = Coro::Signal
4135
4136SV *
4137new (SV *klass)
4138 CODE:
4139 RETVAL = sv_bless (
4140 coro_waitarray_new (aTHX_ 0),
4141 GvSTASH (CvGV (cv))
4142 );
4143 OUTPUT:
4144 RETVAL
4145
4146void
4147wait (...)
4148 CODE:
4149 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4150
4151void
4152broadcast (SV *self)
4153 CODE:
4154{
4155 AV *av = (AV *)SvRV (self);
4156 coro_signal_wake (aTHX_ av, AvFILLp (av));
4157}
4158
4159void
4160send (SV *self)
4161 CODE:
4162{
4163 AV *av = (AV *)SvRV (self);
4164
4165 if (AvFILLp (av))
4166 coro_signal_wake (aTHX_ av, 1);
4167 else
4168 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4169}
4170
4171IV
4172awaited (SV *self)
4173 CODE:
4174 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4175 OUTPUT:
4176 RETVAL
4177
4178
4179MODULE = Coro::State PACKAGE = Coro::AnyEvent
4180
4181BOOT:
4182 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4183
4184void
4185_schedule (...)
4186 CODE:
4187{
4188 static int incede;
4189
4190 api_cede_notself (aTHX);
4191
4192 ++incede;
4193 while (coro_nready >= incede && api_cede (aTHX))
4194 ;
4195
4196 sv_setsv (sv_activity, &PL_sv_undef);
4197 if (coro_nready >= incede)
4198 {
4199 PUSHMARK (SP);
4200 PUTBACK;
4201 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4202 }
4203
4204 --incede;
4205}
4206
4207
4208MODULE = Coro::State PACKAGE = Coro::AIO
4209
4210void
4211_register (char *target, char *proto, SV *req)
4212 CODE:
4213{
4214 SV *req_cv = s_get_cv_croak (req);
4215 /* newXSproto doesn't return the CV on 5.8 */
4216 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4217 sv_setpv ((SV *)slf_cv, proto);
4218 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4219}
4220
4221MODULE = Coro::State PACKAGE = Coro::Select
4222
4223void
4224patch_pp_sselect ()
4225 CODE:
4226 if (!coro_old_pp_sselect)
4227 {
4228 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4229 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4230 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4231 }
4232
4233void
4234unpatch_pp_sselect ()
4235 CODE:
4236 if (coro_old_pp_sselect)
4237 {
4238 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4239 coro_old_pp_sselect = 0;
4240 }
4241

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