diff options
Diffstat (limited to 'ev.c')
| -rw-r--r-- | ev.c | 144 |
1 files changed, 87 insertions, 57 deletions
@@ -424,12 +424,31 @@ typedef struct } ANPENDING; #if EV_USE_INOTIFY +/* hash table entry per inotify-id */ typedef struct { WL head; } ANFS; #endif +/* Heap Entry */ +#if EV_HEAP_CACHE_AT + typedef struct { + WT w; + ev_tstamp at; + } ANHE; + + #define ANHE_w(he) (he) /* access watcher, read-write */ + #define ANHE_at(he) (he)->at /* acces cahced at, read-only */ + #define ANHE_at_set(he) (he)->at = (he)->w->at /* update at from watcher */ +#else + typedef WT ANHE; + + #define ANHE_w(he) (he) + #define ANHE_at(he) (he)->at + #define ANHE_at_set(he) +#endif + #if EV_MULTIPLICITY struct ev_loop @@ -762,82 +781,87 @@ fd_rearm_all (EV_P) /*****************************************************************************/ /* + * the heap functions want a real array index. array index 0 uis guaranteed to not + * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives + * the branching factor of the d-tree. + */ + +/* * at the moment we allow libev the luxury of two heaps, * a small-code-size 2-heap one and a ~1.5kb larger 4-heap * which is more cache-efficient. * the difference is about 5% with 50000+ watchers. */ -#define USE_4HEAP !EV_MINIMAL -#if USE_4HEAP +#define EV_USE_4HEAP !EV_MINIMAL +#if EV_USE_4HEAP #define DHEAP 4 #define HEAP0 (DHEAP - 1) /* index of first element in heap */ /* towards the root */ void inline_speed -upheap (WT *heap, int k) +upheap (ANHE *heap, int k) { - WT w = heap [k]; - ev_tstamp w_at = w->at; + ANHE he = heap [k]; for (;;) { int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0; - if (p == k || heap [p]->at <= w_at) + if (p == k || ANHE_at (heap [p]) <= ANHE_at (he)) break; heap [k] = heap [p]; - ev_active (heap [k]) = k; + ev_active (ANHE_w (heap [k])) = k; k = p; } - heap [k] = w; - ev_active (heap [k]) = k; + ev_active (ANHE_w (he)) = k; + heap [k] = he; } /* away from the root */ void inline_speed -downheap (WT *heap, int N, int k) +downheap (ANHE *heap, int N, int k) { - WT w = heap [k]; - WT *E = heap + N + HEAP0; + ANHE he = heap [k]; + ANHE *E = heap + N + HEAP0; for (;;) { ev_tstamp minat; - WT *minpos; - WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0; + ANHE *minpos; + ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0; // find minimum child if (expect_true (pos + DHEAP - 1 < E)) { - /* fast path */ (minpos = pos + 0), (minat = (*minpos)->at); - if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at); - if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at); - if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at); + /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); + if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); + if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); + if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else if (pos < E) { - /* slow path */ (minpos = pos + 0), (minat = (*minpos)->at); - if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at); - if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at); - if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at); + /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); + if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); + if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); + if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else break; - if (w->at <= minat) + if (ANHE_at (he) <= minat) break; - ev_active (*minpos) = k; + ev_active (ANHE_w (*minpos)) = k; heap [k] = *minpos; k = minpos - heap; } - heap [k] = w; - ev_active (heap [k]) = k; + ev_active (ANHE_w (he)) = k; + heap [k] = he; } #else // 4HEAP @@ -846,32 +870,32 @@ downheap (WT *heap, int N, int k) /* towards the root */ void inline_speed -upheap (WT *heap, int k) +upheap (ANHE *heap, int k) { - WT w = heap [k]; + ANHE he = heap [k]; for (;;) { int p = k >> 1; /* maybe we could use a dummy element at heap [0]? */ - if (!p || heap [p]->at <= w->at) + if (!p || ANHE_at (heap [p]) <= ANHE_at (he)) break; heap [k] = heap [p]; - ev_active (heap [k]) = k; + ev_active (ANHE_w (heap [k])) = k; k = p; } heap [k] = w; - ev_active (heap [k]) = k; + ev_active (ANHE_w (heap [k])) = k; } /* away from the root */ void inline_speed -downheap (WT *heap, int N, int k) +downheap (ANHE *heap, int N, int k) { - WT w = heap [k]; + ANHE he = heap [k]; for (;;) { @@ -880,25 +904,25 @@ downheap (WT *heap, int N, int k) if (c > N) break; - c += c + 1 < N && heap [c]->at > heap [c + 1]->at + c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) ? 1 : 0; - if (w->at <= heap [c]->at) + if (w->at <= ANHE_at (heap [c])) break; heap [k] = heap [c]; - ((W)heap [k])->active = k; + ev_active (ANHE_w (heap [k])) = k; k = c; } - heap [k] = w; - ev_active (heap [k]) = k; + heap [k] = he; + ev_active (ANHE_w (he)) = k; } #endif void inline_size -adjustheap (WT *heap, int N, int k) +adjustheap (ANHE *heap, int N, int k) { upheap (heap, k); downheap (heap, N, k); @@ -1572,9 +1596,9 @@ idle_reify (EV_P) void inline_size timers_reify (EV_P) { - while (timercnt && ev_at (timers [HEAP0]) <= mn_now) + while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now) { - ev_timer *w = (ev_timer *)timers [HEAP0]; + ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ @@ -1600,9 +1624,9 @@ timers_reify (EV_P) void inline_size periodics_reify (EV_P) { - while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now) + while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now) { - ev_periodic *w = (ev_periodic *)periodics [HEAP0]; + ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ @@ -1633,9 +1657,9 @@ periodics_reschedule (EV_P) int i; /* adjust periodics after time jump */ - for (i = 1; i <= periodiccnt; ++i) + for (i = HEAP0; i < periodiccnt + HEAP0; ++i) { - ev_periodic *w = (ev_periodic *)periodics [i]; + ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); @@ -1643,7 +1667,7 @@ periodics_reschedule (EV_P) ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; } - /* now rebuild the heap */ + /* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */ for (i = periodiccnt >> 1; --i; ) downheap (periodics, periodiccnt, i + HEAP0); } @@ -1709,8 +1733,12 @@ time_update (EV_P_ ev_tstamp max_block) periodics_reschedule (EV_A); #endif /* adjust timers. this is easy, as the offset is the same for all of them */ - for (i = 1; i <= timercnt; ++i) - ev_at (timers [i]) += ev_rt_now - mn_now; + for (i = 0; i < timercnt; ++i) + { + ANHE *he = timers + i + HEAP0; + ANHE_w (*he)->at += ev_rt_now - mn_now; + ANHE_at_set (*he); + } } mn_now = ev_rt_now; @@ -1790,14 +1818,14 @@ ev_loop (EV_P_ int flags) if (timercnt) { - ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge; + ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; if (waittime > to) waittime = to; } #if EV_PERIODIC_ENABLE if (periodiccnt) { - ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; + ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; if (waittime > to) waittime = to; } #endif @@ -1978,8 +2006,9 @@ ev_timer_start (EV_P_ ev_timer *w) assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1); - array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2); - timers [ev_active (w)] = (WT)w; + array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); + ANHE_w (timers [ev_active (w)]) = (WT)w; + ANHE_at_set (timers [ev_active (w)]); upheap (timers, ev_active (w)); /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/ @@ -1995,7 +2024,7 @@ ev_timer_stop (EV_P_ ev_timer *w) { int active = ev_active (w); - assert (("internal timer heap corruption", timers [active] == (WT)w)); + assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); if (expect_true (active < timercnt + HEAP0 - 1)) { @@ -2019,6 +2048,7 @@ ev_timer_again (EV_P_ ev_timer *w) if (w->repeat) { ev_at (w) = mn_now + w->repeat; + ANHE_at_set (timers [ev_active (w)]); adjustheap (timers, timercnt, ev_active (w)); } else @@ -2050,11 +2080,11 @@ ev_periodic_start (EV_P_ ev_periodic *w) ev_at (w) = w->offset; ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1); - array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2); - periodics [ev_active (w)] = (WT)w; + array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); + ANHE_w (periodics [ev_active (w)]) = (WT)w; upheap (periodics, ev_active (w)); - /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/ + /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ } void noinline @@ -2067,7 +2097,7 @@ ev_periodic_stop (EV_P_ ev_periodic *w) { int active = ev_active (w); - assert (("internal periodic heap corruption", periodics [active] == (WT)w)); + assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); if (expect_true (active < periodiccnt + HEAP0 - 1)) { |