fix async event fd after fork. pipe re-create

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/evas@75193 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

diff --git a/ChangeLog b/ChangeLog
index f6c0754..3dc79f0 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -953,3 +953,7 @@
 2012-08-07  Cedric Bail
 
        * Properly warn when user try to link object from different canvas.
+
+2012-08-13  Carsten Haitzler (The Rasterman)
+
+       * Fix async fd stuff to generate new pipe after a fork (pid mismatch)

diff --git a/src/lib/canvas/evas_async_events.c b/src/lib/canvas/evas_async_events.c
index bd2e3a8..1002d3d 100644 (file)
--- a/src/lib/canvas/evas_async_events.c
+++ b/src/lib/canvas/evas_async_events.c
@@ -19,6 +19,7 @@
 
 static int _fd_write = -1;
 static int _fd_read = -1;
+static pid_t _fd_pid = 0;
 
 static int _init_evas_event = 0;
 
@@ -40,6 +41,8 @@ evas_async_events_init(void)
    _init_evas_event++;
    if (_init_evas_event > 1) return _init_evas_event;
 
+   _fd_pid = getpid();
+   
    if (pipe(filedes) == -1)
      {
        _init_evas_event = 0;
@@ -68,12 +71,23 @@ evas_async_events_shutdown(void)
    return _init_evas_event;
 }
 
+static void
+_evas_async_events_fork_handle(void)
+{
+   int i, count = _init_evas_event;
+   
+   if (getpid() == _fd_pid) return;
+   for (i = 0; i < count; i++) evas_async_events_shutdown();
+   for (i = 0; i < count; i++) evas_async_events_init();
+}
+
 #endif
 
 EAPI int
 evas_async_events_fd_get(void)
 {
 #ifdef BUILD_ASYNC_EVENTS
+   _evas_async_events_fork_handle();
    return _fd_read;
 #else
    return -1;
@@ -90,6 +104,8 @@ evas_async_events_process(void)
 
    if (_fd_read == -1) return 0;
 
+   _evas_async_events_fork_handle();
+   
    do
      {
        check = read(_fd_read, &ev, sizeof (Evas_Event_Async *));
@@ -134,6 +150,8 @@ evas_async_events_put(const void *target, Evas_Callback_Type type, void *event_i
    if (!func) return 0;
    if (_fd_write == -1) return 0;
 
+   _evas_async_events_fork_handle();
+   
    ev = calloc(1, sizeof (Evas_Event_Async));
    if (!ev) return 0;