stuffs

[software/libev.git] / ev.c

diff --git a/ev.c b/ev.c
index ffd19c66d08269742f0b3594ee9cf89230e8329a..8a09326689781cc46d8270135b2d77ca54622ec1 100644 (file)
--- a/ev.c
+++ b/ev.c
@@ -38,6 +38,8 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 #include <sys/time.h>
 #include <time.h>
 
@@ -61,6 +63,7 @@
 
 #define MIN_TIMEJUMP  1. /* minimum timejump that gets detected (if monotonic clock available) */
 #define MAX_BLOCKTIME 60.
+#define PID_HASHSIZE  16 /* size of pid hahs table, must be power of two */
 
 #include "ev.h"
 
@@ -112,7 +115,13 @@ get_clock (void)
 #define array_needsize(base,cur,cnt,init)              \
   if ((cnt) > cur)                                     \
     {                                                  \
-      int newcnt = cur ? cur << 1 : 16;                        \
+      int newcnt = cur;                                        \
+      do                                               \
+        {                                              \
+          newcnt = (newcnt << 1) | 4 & ~3;             \
+        }                                              \
+      while ((cnt) > newcnt);                          \
+                                                       \
       base = realloc (base, sizeof (*base) * (newcnt));        \
       init (base + cur, newcnt - cur);                 \
       cur = newcnt;                                    \
@@ -190,7 +199,7 @@ queue_events (W *events, int eventcnt, int type)
 
 /* called on EBADF to verify fds */
 static void
-fd_recheck ()
+fd_recheck (void)
 {
   int fd;
 
@@ -198,7 +207,10 @@ fd_recheck ()
     if (anfds [fd].wev)
       if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
         while (anfds [fd].head)
-          evio_stop (anfds [fd].head);
+          {
+            event ((W)anfds [fd].head, EV_ERROR);
+            evio_stop (anfds [fd].head);
+          }
 }
 
 /*****************************************************************************/
@@ -334,6 +346,30 @@ static int checkmax, checkcnt;
 
 /*****************************************************************************/
 
+static struct ev_child *childs [PID_HASHSIZE];
+static struct ev_signal childev;
+
+#ifndef WCONTINUED
+# define WCONTINUED 0
+#endif
+
+static void
+childcb (struct ev_signal *sw, int revents)
+{
+  struct ev_child *w;
+  int pid, status;
+
+  while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
+    for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
+      if (w->pid == pid || w->pid == -1)
+        {
+          w->status = status;
+          event ((W)w, EV_CHILD);
+        }
+}
+
+/*****************************************************************************/
+
 #if HAVE_EPOLL
 # include "ev_epoll.c"
 #endif
@@ -341,35 +377,53 @@ static int checkmax, checkcnt;
 # include "ev_select.c"
 #endif
 
+int
+ev_version_major (void)
+{
+  return EV_VERSION_MAJOR;
+}
+
+int
+ev_version_minor (void)
+{
+  return EV_VERSION_MINOR;
+}
+
 int ev_init (int flags)
 {
+  if (!ev_method)
+    {
 #if HAVE_MONOTONIC
-  {
-    struct timespec ts;
-    if (!clock_gettime (CLOCK_MONOTONIC, &ts))
-      have_monotonic = 1;
-  }
+      {
+        struct timespec ts;
+        if (!clock_gettime (CLOCK_MONOTONIC, &ts))
+          have_monotonic = 1;
+      }
 #endif
 
-  ev_now = ev_time ();
-  now    = get_clock ();
-  diff   = ev_now - now;
+      ev_now = ev_time ();
+      now    = get_clock ();
+      diff   = ev_now - now;
 
-  if (pipe (sigpipe))
-    return 0;
+      if (pipe (sigpipe))
+        return 0;
 
-  ev_method = EVMETHOD_NONE;
+      ev_method = EVMETHOD_NONE;
 #if HAVE_EPOLL
-  if (ev_method == EVMETHOD_NONE) epoll_init (flags);
+      if (ev_method == EVMETHOD_NONE) epoll_init (flags);
 #endif
 #if HAVE_SELECT
-  if (ev_method == EVMETHOD_NONE) select_init (flags);
+      if (ev_method == EVMETHOD_NONE) select_init (flags);
 #endif
 
-  if (ev_method)
-    {
-      evw_init (&sigev, sigcb);
-      siginit ();
+      if (ev_method)
+        {
+          evw_init (&sigev, sigcb);
+          siginit ();
+
+          evsignal_init (&childev, childcb, SIGCHLD);
+          evsignal_start (&childev);
+        }
     }
 
   return ev_method;
@@ -377,17 +431,20 @@ int ev_init (int flags)
 
 /*****************************************************************************/
 
-void ev_prefork (void)
+void
+ev_prefork (void)
 {
   /* nop */
 }
 
-void ev_postfork_parent (void)
+void
+ev_postfork_parent (void)
 {
   /* nop */
 }
 
-void ev_postfork_child (void)
+void
+ev_postfork_child (void)
 {
 #if HAVE_EPOLL
   if (ev_method == EVMETHOD_EPOLL)
@@ -430,7 +487,7 @@ fd_reify (void)
 }
 
 static void
-call_pending ()
+call_pending (void)
 {
   while (pendingcnt)
     {
@@ -445,7 +502,7 @@ call_pending ()
 }
 
 static void
-timers_reify ()
+timers_reify (void)
 {
   while (timercnt && timers [0]->at <= now)
     {
@@ -466,7 +523,7 @@ timers_reify ()
 }
 
 static void
-periodics_reify ()
+periodics_reify (void)
 {
   while (periodiccnt && periodics [0]->at <= ev_now)
     {
@@ -512,7 +569,7 @@ periodics_reschedule (ev_tstamp diff)
 }
 
 static void
-time_update ()
+time_update (void)
 {
   int i;
 
@@ -881,6 +938,25 @@ void evcheck_stop (struct ev_check *w)
   ev_stop ((W)w);
 }
 
+void evchild_start (struct ev_child *w)
+{
+  if (ev_is_active (w))
+    return;
+
+  ev_start ((W)w, 1);
+  wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
+}
+
+void evchild_stop (struct ev_child *w)
+{
+  ev_clear ((W)w);
+  if (ev_is_active (w))
+    return;
+
+  wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
+  ev_stop ((W)w);
+}
+
 /*****************************************************************************/
 
 struct ev_once