1 |
/* most win32 perls are beyond fixing, requiring dTHX */ |
2 |
/* even for ISO-C functions such as malloc. avoid! avoid! avoid! */ |
3 |
/* and fail to define numerous symbols, but still overrwide them */ |
4 |
/* with non-working versions (e.g. setjmp). */ |
5 |
#ifdef _WIN32 |
6 |
/*# define PERL_CORE 1 fixes some, breaks others */ |
7 |
#else |
8 |
# define PERL_NO_GET_CONTEXT |
9 |
#endif |
10 |
|
11 |
#include "EXTERN.h" |
12 |
#include "perl.h" |
13 |
#include "XSUB.h" |
14 |
|
15 |
#define X_STACKSIZE 1024 * sizeof (void *) |
16 |
|
17 |
#include "CoroAPI.h" |
18 |
#include "perlmulticore.h" |
19 |
#include "schmorp.h" |
20 |
#include "xthread.h" |
21 |
|
22 |
#ifdef _WIN32 |
23 |
#ifndef sigset_t |
24 |
#define sigset_t int |
25 |
#endif |
26 |
#endif |
27 |
|
28 |
#ifndef SvREFCNT_dec_NN |
29 |
#define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv) |
30 |
#endif |
31 |
|
32 |
#ifndef SvREFCNT_dec_simple_void_NN |
33 |
#define SvREFCNT_dec_simple_void_NN(sv) SvREFCNT_dec (sv) |
34 |
#endif |
35 |
|
36 |
#ifndef SvREFCNT_inc_NN |
37 |
#define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv) |
38 |
#endif |
39 |
|
40 |
#define RECURSION_CHECK 0 |
41 |
|
42 |
static X_TLS_DECLARE(current_key); |
43 |
#if RECURSION_CHECK |
44 |
static X_TLS_DECLARE(check_key); |
45 |
#endif |
46 |
|
47 |
|
48 |
static s_epipe ep; |
49 |
static void *perl_thx; |
50 |
static sigset_t cursigset, fullsigset; |
51 |
|
52 |
static int global_enable = 0; |
53 |
static int thread_enable; /* 0 undefined, 1 disabled, 2 enabled */ |
54 |
|
55 |
/* assigned to a thread for each release/acquire */ |
56 |
struct tctx |
57 |
{ |
58 |
void *coro; |
59 |
int wait_f; |
60 |
xcond_t acquire_c; |
61 |
int jeret; |
62 |
}; |
63 |
|
64 |
static struct tctx *tctx_free; |
65 |
|
66 |
static struct tctx * |
67 |
tctx_get (void) |
68 |
{ |
69 |
struct tctx *ctx; |
70 |
|
71 |
if (!tctx_free) |
72 |
{ |
73 |
ctx = malloc (sizeof (*tctx_free)); |
74 |
X_COND_CREATE (ctx->acquire_c); |
75 |
} |
76 |
else |
77 |
{ |
78 |
ctx = tctx_free; |
79 |
tctx_free = tctx_free->coro; |
80 |
} |
81 |
|
82 |
return ctx; |
83 |
} |
84 |
|
85 |
static void |
86 |
tctx_put (struct tctx *ctx) |
87 |
{ |
88 |
ctx->coro = tctx_free; |
89 |
tctx_free = ctx; |
90 |
} |
91 |
|
92 |
/* a stack of tctxs */ |
93 |
struct tctxs |
94 |
{ |
95 |
struct tctx **ctxs; |
96 |
int cur, max; |
97 |
}; |
98 |
|
99 |
static struct tctx * |
100 |
tctxs_get (struct tctxs *ctxs) |
101 |
{ |
102 |
return ctxs->ctxs[--ctxs->cur]; |
103 |
} |
104 |
|
105 |
static void |
106 |
tctxs_put (struct tctxs *ctxs, struct tctx *ctx) |
107 |
{ |
108 |
if (ctxs->cur >= ctxs->max) |
109 |
{ |
110 |
ctxs->max = ctxs->max ? ctxs->max * 2 : 16; |
111 |
ctxs->ctxs = realloc (ctxs->ctxs, ctxs->max * sizeof (ctxs->ctxs[0])); |
112 |
} |
113 |
|
114 |
ctxs->ctxs[ctxs->cur++] = ctx; |
115 |
} |
116 |
|
117 |
static xmutex_t release_m = X_MUTEX_INIT; |
118 |
static xcond_t release_c = X_COND_INIT; |
119 |
static struct tctxs releasers; |
120 |
static int idle; |
121 |
static int min_idle = 1; |
122 |
static int curthreads, max_threads = 1; /* protected by release_m */ |
123 |
|
124 |
static xmutex_t acquire_m = X_MUTEX_INIT; |
125 |
static struct tctxs acquirers; |
126 |
|
127 |
X_THREAD_PROC(thread_proc) |
128 |
{ |
129 |
PERL_SET_CONTEXT (perl_thx); |
130 |
|
131 |
{ |
132 |
dTHXa (perl_thx); |
133 |
dJMPENV; |
134 |
struct tctx *ctx; |
135 |
int catchret; |
136 |
|
137 |
X_LOCK (release_m); |
138 |
|
139 |
for (;;) |
140 |
{ |
141 |
while (!releasers.cur) |
142 |
if (idle <= min_idle || 1) |
143 |
X_COND_WAIT (release_c, release_m); |
144 |
else |
145 |
{ |
146 |
struct timespec ts = { time (0) + idle - min_idle, 0 }; |
147 |
|
148 |
if (X_COND_TIMEDWAIT (release_c, release_m, ts) == ETIMEDOUT) |
149 |
if (idle > min_idle && !releasers.cur) |
150 |
break; |
151 |
} |
152 |
|
153 |
ctx = tctxs_get (&releasers); |
154 |
--idle; |
155 |
X_UNLOCK (release_m); |
156 |
|
157 |
if (!ctx) /* timed out? */ |
158 |
break; |
159 |
|
160 |
pthread_sigmask (SIG_SETMASK, &cursigset, 0); |
161 |
JMPENV_PUSH (ctx->jeret); |
162 |
|
163 |
if (!ctx->jeret) |
164 |
while (ctx->coro) |
165 |
CORO_SCHEDULE; |
166 |
|
167 |
JMPENV_POP; |
168 |
pthread_sigmask (SIG_SETMASK, &fullsigset, &cursigset); |
169 |
|
170 |
X_LOCK (acquire_m); |
171 |
ctx->wait_f = 1; |
172 |
X_COND_SIGNAL (ctx->acquire_c); |
173 |
X_UNLOCK (acquire_m); |
174 |
|
175 |
X_LOCK (release_m); |
176 |
++idle; |
177 |
} |
178 |
} |
179 |
} |
180 |
|
181 |
static void |
182 |
start_thread (void) |
183 |
{ |
184 |
xthread_t tid; |
185 |
|
186 |
if (curthreads >= max_threads && 0) |
187 |
return; |
188 |
|
189 |
++curthreads; |
190 |
++idle; |
191 |
xthread_create (&tid, thread_proc, 0); |
192 |
} |
193 |
|
194 |
static void |
195 |
pmapi_release (void) |
196 |
{ |
197 |
#if RECURSION_CHECK |
198 |
if (X_TLS_GET (check_key)) |
199 |
croak ("perlinterp_release () called without valid perl context"); |
200 |
|
201 |
X_TLS_SET (check_key, &check_key); |
202 |
#endif |
203 |
|
204 |
if (! ((thread_enable ? thread_enable : global_enable) & 1)) |
205 |
{ |
206 |
X_TLS_SET (current_key, 0); |
207 |
return; |
208 |
} |
209 |
|
210 |
struct tctx *ctx = tctx_get (); |
211 |
ctx->coro = SvREFCNT_inc_simple_NN (CORO_CURRENT); |
212 |
ctx->wait_f = 0; |
213 |
|
214 |
X_TLS_SET (current_key, ctx); |
215 |
pthread_sigmask (SIG_SETMASK, &fullsigset, &cursigset); |
216 |
|
217 |
X_LOCK (release_m); |
218 |
|
219 |
if (idle <= min_idle) |
220 |
start_thread (); |
221 |
|
222 |
tctxs_put (&releasers, ctx); |
223 |
X_COND_SIGNAL (release_c); |
224 |
|
225 |
while (!idle && releasers.cur) |
226 |
{ |
227 |
X_UNLOCK (release_m); |
228 |
X_LOCK (release_m); |
229 |
} |
230 |
|
231 |
X_UNLOCK (release_m); |
232 |
} |
233 |
|
234 |
static void |
235 |
pmapi_acquire (void) |
236 |
{ |
237 |
int jeret; |
238 |
struct tctx *ctx = X_TLS_GET (current_key); |
239 |
|
240 |
#if RECURSION_CHECK |
241 |
if (X_TLS_GET (check_key) != &check_key) |
242 |
croak ("perlinterp_acquire () called with valid perl context"); |
243 |
|
244 |
X_TLS_SET (check_key, 0); |
245 |
#endif |
246 |
|
247 |
if (!ctx) |
248 |
return; |
249 |
|
250 |
X_LOCK (acquire_m); |
251 |
|
252 |
tctxs_put (&acquirers, ctx); |
253 |
|
254 |
s_epipe_signal (&ep); |
255 |
while (!ctx->wait_f) |
256 |
X_COND_WAIT (ctx->acquire_c, acquire_m); |
257 |
X_UNLOCK (acquire_m); |
258 |
|
259 |
jeret = ctx->jeret; |
260 |
tctx_put (ctx); |
261 |
pthread_sigmask (SIG_SETMASK, &cursigset, 0); |
262 |
|
263 |
if (jeret) |
264 |
{ |
265 |
dTHX; |
266 |
JMPENV_JUMP (jeret); |
267 |
} |
268 |
} |
269 |
|
270 |
static void |
271 |
set_thread_enable (pTHX_ void *arg) |
272 |
{ |
273 |
thread_enable = PTR2IV (arg); |
274 |
} |
275 |
|
276 |
MODULE = Coro::Multicore PACKAGE = Coro::Multicore |
277 |
|
278 |
PROTOTYPES: DISABLE |
279 |
|
280 |
BOOT: |
281 |
{ |
282 |
#ifndef _WIN32 |
283 |
sigfillset (&fullsigset); |
284 |
#endif |
285 |
|
286 |
X_TLS_INIT (current_key); |
287 |
#if RECURSION_CHECK |
288 |
X_TLS_INIT (check_key); |
289 |
#endif |
290 |
|
291 |
if (s_epipe_new (&ep)) |
292 |
croak ("Coro::Multicore: unable to initialise event pipe.\n"); |
293 |
|
294 |
perl_thx = PERL_GET_CONTEXT; |
295 |
|
296 |
I_CORO_API ("Coro::Multicore"); |
297 |
|
298 |
X_LOCK (release_m); |
299 |
while (idle < min_idle) |
300 |
start_thread (); |
301 |
X_UNLOCK (release_m); |
302 |
|
303 |
/* not perfectly efficient to do it this way, but it is simple */ |
304 |
perl_multicore_init (); /* calls release */ |
305 |
perl_multicore_api->pmapi_release = pmapi_release; |
306 |
perl_multicore_api->pmapi_acquire = pmapi_acquire; |
307 |
} |
308 |
|
309 |
bool |
310 |
enable (bool enable = NO_INIT) |
311 |
CODE: |
312 |
RETVAL = global_enable; |
313 |
if (items) |
314 |
global_enable = enable; |
315 |
OUTPUT: |
316 |
RETVAL |
317 |
|
318 |
void |
319 |
scoped_enable () |
320 |
CODE: |
321 |
LEAVE; /* see Guard.xs */ |
322 |
CORO_ENTERLEAVE_SCOPE_HOOK (set_thread_enable, (void *)1, set_thread_enable, (void *)0); |
323 |
ENTER; /* see Guard.xs */ |
324 |
|
325 |
void |
326 |
scoped_disable () |
327 |
CODE: |
328 |
LEAVE; /* see Guard.xs */ |
329 |
CORO_ENTERLEAVE_SCOPE_HOOK (set_thread_enable, (void *)2, set_thread_enable, (void *)0); |
330 |
ENTER; /* see Guard.xs */ |
331 |
|
332 |
U32 |
333 |
min_idle_threads (U32 min = NO_INIT) |
334 |
CODE: |
335 |
X_LOCK (acquire_m); |
336 |
RETVAL = min_idle; |
337 |
if (items) |
338 |
min_idle = min; |
339 |
X_UNLOCK (acquire_m); |
340 |
OUTPUT: |
341 |
RETVAL |
342 |
|
343 |
|
344 |
int |
345 |
fd () |
346 |
CODE: |
347 |
RETVAL = s_epipe_fd (&ep); |
348 |
OUTPUT: |
349 |
RETVAL |
350 |
|
351 |
void |
352 |
poll (...) |
353 |
CODE: |
354 |
s_epipe_drain (&ep); |
355 |
X_LOCK (acquire_m); |
356 |
while (acquirers.cur) |
357 |
{ |
358 |
struct tctx *ctx = tctxs_get (&acquirers); |
359 |
CORO_READY ((SV *)ctx->coro); |
360 |
SvREFCNT_dec_simple_void_NN ((SV *)ctx->coro); |
361 |
ctx->coro = 0; |
362 |
} |
363 |
X_UNLOCK (acquire_m); |
364 |
|
365 |
void |
366 |
sleep (NV seconds) |
367 |
CODE: |
368 |
perlinterp_release (); |
369 |
{ |
370 |
int nsec = seconds; |
371 |
if (nsec) sleep (nsec); |
372 |
nsec = (seconds - nsec) * 1e9; |
373 |
if (nsec) usleep (nsec); |
374 |
} |
375 |
perlinterp_acquire (); |
376 |
|