*** empty log message ***

[software/libev.git] / ev.c

diff --git a/ev.c b/ev.c
index 40e229202319dc8addb2e11810669428005e77d8..8911cb8466145287be2f6b82f6537ae5bdb36257 100644 (file)
--- a/ev.c
+++ b/ev.c
@@ -158,6 +158,14 @@ extern "C" {
 # define EV_USE_PORT 0
 #endif
 
+#ifndef EV_PID_HASHSIZE
+# if EV_MINIMAL
+#  define EV_PID_HASHSIZE 1
+# else
+#  define EV_PID_HASHSIZE 16
+# endif
+#endif
+
 /**/
 
 #ifndef CLOCK_MONOTONIC
@@ -178,7 +186,6 @@ extern "C" {
 
 #define MIN_TIMEJUMP  1. /* minimum timejump that gets detected (if monotonic clock available) */
 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
-#define PID_HASHSIZE  16 /* size of pid hash table, must be power of two */
 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
 
 #ifdef EV_H
@@ -711,7 +718,7 @@ siginit (EV_P)
 
 /*****************************************************************************/
 
-static ev_child *childs [PID_HASHSIZE];
+static ev_child *childs [EV_PID_HASHSIZE];
 
 #ifndef _WIN32
 
@@ -722,7 +729,7 @@ child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
 {
   ev_child *w;
 
-  for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
+  for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
     if (w->pid == pid || !w->pid)
       {
         ev_priority (w) = ev_priority (sw); /* need to do it *now* */
@@ -753,7 +760,8 @@ childcb (EV_P_ ev_signal *sw, int revents)
   ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
 
   child_reap (EV_A_ sw, pid, pid, status);
-  child_reap (EV_A_ sw,   0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
+  if (EV_PID_HASHSIZE > 1)
+    child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
 }
 
 #endif
@@ -1278,6 +1286,16 @@ ev_loop (EV_P_ int flags)
 
   while (activecnt)
     {
+      /* we might have forked, so reify kernel state if necessary */
+      #if EV_FORK_ENABLE
+        if (expect_false (postfork))
+          if (forkcnt)
+            {
+              queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
+              call_pending (EV_A);
+            }
+      #endif
+
       /* queue check watchers (and execute them) */
       if (expect_false (preparecnt))
         {
@@ -1617,7 +1635,7 @@ ev_child_start (EV_P_ ev_child *w)
     return;
 
   ev_start (EV_A_ (W)w, 1);
-  wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
+  wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
 }
 
 void
@@ -1627,7 +1645,7 @@ ev_child_stop (EV_P_ ev_child *w)
   if (expect_false (!ev_is_active (w)))
     return;
 
-  wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
+  wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
   ev_stop (EV_A_ (W)w);
 }
 
@@ -1829,6 +1847,35 @@ ev_embed_stop (EV_P_ ev_embed *w)
 }
 #endif
 
+#if EV_FORK_ENABLE
+void
+ev_fork_start (EV_P_ ev_fork *w)
+{
+  if (expect_false (ev_is_active (w)))
+    return;
+
+  ev_start (EV_A_ (W)w, ++forkcnt);
+  array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
+  forks [forkcnt - 1] = w;
+}
+
+void
+ev_fork_stop (EV_P_ ev_fork *w)
+{
+  ev_clear_pending (EV_A_ (W)w);
+  if (expect_false (!ev_is_active (w)))
+    return;
+
+  {
+    int active = ((W)w)->active;
+    forks [active - 1] = forks [--forkcnt];
+    ((W)forks [active - 1])->active = active;
+  }
+
+  ev_stop (EV_A_ (W)w);
+}
+#endif
+
 /*****************************************************************************/
 
 struct ev_once