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-rw-r--r--gdb/serial.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/gdb/serial.h b/gdb/serial.h
index a0dbe72..97d68f3 100644
--- a/gdb/serial.h
+++ b/gdb/serial.h
@@ -32,7 +32,10 @@ typedef void *serial_ttystate;
struct serial;
/* Try to open NAME. Returns a new `struct serial *' on success, NULL
- on failure. */
+ on failure. Note that some open calls can block and, if possible,
+ should be written to be non-blocking, with calls to ui_look_hook
+ so they can be cancelled. An async interface for open could be
+ added to GDB if necessary. */
extern struct serial *serial_open (const char *name);