fix "stuck mouse button" by setting O_NONBLOCK, instead of using select() to check write() blocking on pipe.

Marius Gedminas have located the bug as send original patch. Modified version by me.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13873 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 17 insertions, 16 deletions

diff --git a/fifo.c b/fifo.c
index dc9d832432..ea76e9c906 100644
--- a/fifo.c
+++ b/fifo.c
@@ -5,30 +5,31 @@
 static int keyb_fifo_put=-1;
 static int keyb_fifo_get=-1;
 
+static void set_nonblock_flag(int fd) {
+  int oldflags;
+
+  oldflags = fcntl(fd, F_GETFL, 0);
+  if (oldflags != -1) {
+    if (fcntl(keyb_fifo_put, F_SETFL, oldflags | O_NONBLOCK) != -1) {
+       return;
+    }
+  }
+  mp_msg(MSGT_INPUT,MSGL_ERR,"Cannot set nonblocking mode for fd %d!\n", fd);
+}
+
 static void make_pipe(int* pr,int* pw){
   int temp[2];
   if(pipe(temp)!=0) mp_msg(MSGT_FIXME, MSGL_FIXME, MSGTR_CannotMakePipe);
   *pr=temp[0];
   *pw=temp[1];
+  set_nonblock_flag(temp[1]);
 }
 
 void mplayer_put_key(int code){
-           fd_set rfds;
-           struct timeval tv;
-
-           /* Watch stdin (fd 0) to see when it has input. */
-           FD_ZERO(&rfds);
-           FD_SET(keyb_fifo_put, &rfds);
-           tv.tv_sec = 0;
-           tv.tv_usec = 0;
-
-           //retval = select(keyb_fifo_put+1, &rfds, NULL, NULL, &tv);
-           if(select(keyb_fifo_put+1, NULL, &rfds, NULL, &tv)>0){
-             write(keyb_fifo_put,&code,4);
-//             printf("*** key event %d sent ***\n",code);
-           } else {
-//             printf("*** key event dropped (FIFO is full) ***\n");
-           }
+
+    if( write(keyb_fifo_put,&code,4) != 4 ){
+        mp_msg(MSGT_INPUT,MSGL_ERR,"*** key event dropped (FIFO is full) ***\n");
+    }
 }
 
 #else