More cleanup in handling subprocess exiting on MS-Windows.

[bpt/emacs.git] / src / w32proc.c

diff --git a/src/w32proc.c b/src/w32proc.c
index 5c43a57..8977ca3 100644 (file)
--- a/src/w32proc.c
+++ b/src/w32proc.c
@@ -970,6 +970,11 @@ reader_thread (void *arg)
       else
        rc = _sys_read_ahead (cp->fd);
 
+      /* Don't bother waiting for the event if we already have been
+        told to exit by delete_child.  */
+      if (cp->status == STATUS_READ_ERROR || !cp->char_avail)
+       break;
+
       /* The name char_avail is a misnomer - it really just means the
         read-ahead has completed, whether successfully or not. */
       if (!SetEvent (cp->char_avail))
@@ -986,6 +991,11 @@ reader_thread (void *arg)
       if (rc == STATUS_READ_FAILED)
        break;
 
+      /* Don't bother waiting for the acknowledge if we already have
+        been told to exit by delete_child.  */
+      if (cp->status == STATUS_READ_ERROR || !cp->char_consumed)
+       break;
+
       /* Wait until our input is acknowledged before reading again */
       if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
         {
@@ -993,6 +1003,8 @@ reader_thread (void *arg)
                     "%lu for fd %ld\n", GetLastError (), cp->fd));
          break;
         }
+      /* delete_child sets status to STATUS_READ_ERROR when it wants
+        us to exit.  */
       if (cp->status == STATUS_READ_ERROR)
        break;
     }