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132 | #endif |
132 | #endif |
133 | #ifndef D_NAMLEN |
133 | #ifndef D_NAMLEN |
134 | # define D_NAMLEN(de) strlen ((de)->d_name) |
134 | # define D_NAMLEN(de) strlen ((de)->d_name) |
135 | #endif |
135 | #endif |
136 | |
136 | |
137 | /* number of seconds after which an idle threads exit */ |
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138 | #define IDLE_TIMEOUT 10 |
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139 | |
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140 | /* used for struct dirent, AIX doesn't provide it */ |
137 | /* used for struct dirent, AIX doesn't provide it */ |
141 | #ifndef NAME_MAX |
138 | #ifndef NAME_MAX |
142 | # define NAME_MAX 4096 |
139 | # define NAME_MAX 4096 |
143 | #endif |
140 | #endif |
144 | |
141 | |
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223 | static unsigned int max_poll_reqs; /* reslock */ |
220 | static unsigned int max_poll_reqs; /* reslock */ |
224 | |
221 | |
225 | static volatile unsigned int nreqs; /* reqlock */ |
222 | static volatile unsigned int nreqs; /* reqlock */ |
226 | static volatile unsigned int nready; /* reqlock */ |
223 | static volatile unsigned int nready; /* reqlock */ |
227 | static volatile unsigned int npending; /* reqlock */ |
224 | static volatile unsigned int npending; /* reqlock */ |
228 | static volatile unsigned int max_idle = 4; |
225 | static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */ |
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226 | static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */ |
229 | |
227 | |
230 | static xmutex_t wrklock = X_MUTEX_INIT; |
228 | static xmutex_t wrklock; |
231 | static xmutex_t reslock = X_MUTEX_INIT; |
229 | static xmutex_t reslock; |
232 | static xmutex_t reqlock = X_MUTEX_INIT; |
230 | static xmutex_t reqlock; |
233 | static xcond_t reqwait = X_COND_INIT; |
231 | static xcond_t reqwait; |
234 | |
232 | |
235 | #if !HAVE_PREADWRITE |
233 | #if !HAVE_PREADWRITE |
236 | /* |
234 | /* |
237 | * make our pread/pwrite emulation safe against themselves, but not against |
235 | * make our pread/pwrite emulation safe against themselves, but not against |
238 | * normal read/write by using a mutex. slows down execution a lot, |
236 | * normal read/write by using a mutex. slows down execution a lot, |
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368 | } |
366 | } |
369 | |
367 | |
370 | abort (); |
368 | abort (); |
371 | } |
369 | } |
372 | |
370 | |
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371 | static void etp_thread_init (void) |
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372 | { |
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373 | X_MUTEX_CREATE (wrklock); |
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374 | X_MUTEX_CREATE (reslock); |
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375 | X_MUTEX_CREATE (reqlock); |
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376 | X_COND_CREATE (reqwait); |
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377 | } |
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378 | |
373 | static void etp_atfork_prepare (void) |
379 | static void etp_atfork_prepare (void) |
374 | { |
380 | { |
375 | X_LOCK (wrklock); |
381 | X_LOCK (wrklock); |
376 | X_LOCK (reqlock); |
382 | X_LOCK (reqlock); |
377 | X_LOCK (reslock); |
383 | X_LOCK (reslock); |
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415 | idle = 0; |
421 | idle = 0; |
416 | nreqs = 0; |
422 | nreqs = 0; |
417 | nready = 0; |
423 | nready = 0; |
418 | npending = 0; |
424 | npending = 0; |
419 | |
425 | |
420 | etp_atfork_parent (); |
426 | etp_thread_init (); |
421 | } |
427 | } |
422 | |
428 | |
423 | static void |
429 | static void |
424 | etp_once_init (void) |
430 | etp_once_init (void) |
425 | { |
431 | { |
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432 | etp_thread_init (); |
426 | X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child); |
433 | X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child); |
427 | } |
434 | } |
428 | |
435 | |
429 | static int |
436 | static int |
430 | etp_init (void (*want_poll)(void), void (*done_poll)(void)) |
437 | etp_init (void (*want_poll)(void), void (*done_poll)(void)) |
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621 | } |
628 | } |
622 | |
629 | |
623 | static void etp_set_max_idle (unsigned int nthreads) |
630 | static void etp_set_max_idle (unsigned int nthreads) |
624 | { |
631 | { |
625 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
632 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
626 | max_idle = nthreads <= 0 ? 1 : nthreads; |
633 | max_idle = nthreads; |
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634 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
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635 | } |
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636 | |
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637 | static void etp_set_idle_timeout (unsigned int seconds) |
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638 | { |
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639 | if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
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640 | idle_timeout = seconds; |
627 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
641 | if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
628 | } |
642 | } |
629 | |
643 | |
630 | static void etp_set_min_parallel (unsigned int nthreads) |
644 | static void etp_set_min_parallel (unsigned int nthreads) |
631 | { |
645 | { |
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757 | } |
771 | } |
758 | |
772 | |
759 | void eio_set_max_idle (unsigned int nthreads) |
773 | void eio_set_max_idle (unsigned int nthreads) |
760 | { |
774 | { |
761 | etp_set_max_idle (nthreads); |
775 | etp_set_max_idle (nthreads); |
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776 | } |
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777 | |
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778 | void eio_set_idle_timeout (unsigned int seconds) |
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779 | { |
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780 | etp_set_idle_timeout (seconds); |
762 | } |
781 | } |
763 | |
782 | |
764 | void eio_set_min_parallel (unsigned int nthreads) |
783 | void eio_set_min_parallel (unsigned int nthreads) |
765 | { |
784 | { |
766 | etp_set_min_parallel (nthreads); |
785 | etp_set_min_parallel (nthreads); |
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1551 | if (req) |
1570 | if (req) |
1552 | break; |
1571 | break; |
1553 | |
1572 | |
1554 | ++idle; |
1573 | ++idle; |
1555 | |
1574 | |
1556 | ts.tv_sec = time (0) + IDLE_TIMEOUT; |
1575 | ts.tv_sec = time (0) + idle_timeout; |
1557 | if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) |
1576 | if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) |
1558 | { |
1577 | { |
1559 | if (idle > max_idle) |
1578 | if (idle > max_idle) |
1560 | { |
1579 | { |
1561 | --idle; |
1580 | --idle; |