2007-07-02 Markus Deuling <deuling@de.ibm.com>

[deliverable/binutils-gdb.git] / gdb / serial.h

diff --git a/gdb/serial.h b/gdb/serial.h
index 1f0accd4a7ce59fc6244538f80ffc65202eff564..49ad4d11ad0b4d72c18931acf8dc99c9864e3932 100644 (file)
--- a/gdb/serial.h
+++ b/gdb/serial.h
@@ -191,6 +191,11 @@ extern int serial_debug_p (struct serial *scb);
 struct serial
   {
     int fd;                    /* File descriptor */
+    /* File descriptor for a separate error stream that should be
+       immediately forwarded to gdb_stderr.  This may be -1.
+       If != -1, this descriptor should be non-blocking or
+       ops->avail should be non-NULL.  */
+    int error_fd;               
     struct serial_ops *ops;    /* Function vector */
     void *state;                       /* Local context info for open FD */
     serial_ttystate ttystate;  /* Not used (yet) */
@@ -246,6 +251,11 @@ struct serial_ops
     /* Perform a low-level write operation, writing (at most) COUNT
        bytes from BUF.  */
     int (*write_prim)(struct serial *scb, const void *buf, size_t count);
+    /* Return that number of bytes that can be read from FD
+       without blocking.  Return value of -1 means that the
+       the read will not block even if less that requested bytes
+       are available.  */
+    int (*avail)(struct serial *scb, int fd);
 
 #ifdef USE_WIN32API
     /* Return a handle to wait on, indicating available data from SCB