*** empty log message ***

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

diff --git a/gdb/serial.c b/gdb/serial.c
index c1f331d769912c869e5d71d3cfacae87f24f4999..df18b2fa5a9e906912fb693654f63bd170ae8d29 100644 (file)
--- a/gdb/serial.c
+++ b/gdb/serial.c
@@ -33,6 +33,10 @@ static int global_serial_debug_p;
 
 static struct serial_ops *serial_ops_list = NULL;
 
+/* Pointer to list of scb's.  */
+
+static struct serial *scb_base;
+
 /* Non-NULL gives filename which contains a recording of the remote session,
    suitable for playback by gdbserver.  */
 
@@ -157,6 +161,21 @@ serial_add_interface (struct serial_ops *optable)
   serial_ops_list = optable;
 }
 
+/* Return the open serial device for FD, if found, or NULL if FD is
+   not already opened.  */
+
+struct serial *
+serial_for_fd (int fd)
+{
+  struct serial *scb;
+
+  for (scb = scb_base; scb; scb = scb->next)
+    if (scb->fd == fd)
+      return scb;
+
+  return NULL;
+}
+
 /* Open up a device or a network socket, depending upon the syntax of NAME.  */
 
 struct serial *
@@ -196,6 +215,7 @@ serial_open (const char *name)
   scb->bufcnt = 0;
   scb->bufp = scb->buf;
   scb->error_fd = -1;
+  scb->refcnt = 1;
 
   /* `...->open (...)' would get expanded by the open(2) syscall macro.  */
   if ((*scb->ops->open) (scb, open_name))
@@ -205,10 +225,12 @@ serial_open (const char *name)
     }
 
   scb->name = xstrdup (name);
+  scb->next = scb_base;
   scb->debug_p = 0;
   scb->async_state = 0;
   scb->async_handler = NULL;
   scb->async_context = NULL;
+  scb_base = scb;
 
   if (serial_logfile != NULL)
     {
@@ -245,12 +267,15 @@ serial_fdopen_ops (const int fd, struct serial_ops *ops)
   scb->bufcnt = 0;
   scb->bufp = scb->buf;
   scb->error_fd = -1;
+  scb->refcnt = 1;
 
   scb->name = NULL;
+  scb->next = scb_base;
   scb->debug_p = 0;
   scb->async_state = 0;
   scb->async_handler = NULL;
   scb->async_context = NULL;
+  scb_base = scb;
 
   if ((ops->fdopen) != NULL)
     (*ops->fdopen) (scb, fd);
@@ -291,7 +316,22 @@ do_serial_close (struct serial *scb, int really_close)
   if (scb->name)
     xfree (scb->name);
 
-  xfree (scb);
+  /* For serial_is_open.  */
+  scb->bufp = NULL;
+
+  if (scb_base == scb)
+    scb_base = scb_base->next;
+  else
+    for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
+      {
+       if (tmp_scb->next != scb)
+         continue;
+
+       tmp_scb->next = tmp_scb->next->next;
+       break;
+      }
+
+  serial_unref (scb);
 }
 
 void
@@ -306,6 +346,26 @@ serial_un_fdopen (struct serial *scb)
   do_serial_close (scb, 0);
 }
 
+int
+serial_is_open (struct serial *scb)
+{
+  return scb->bufp != NULL;
+}
+
+void
+serial_ref (struct serial *scb)
+{
+  scb->refcnt++;
+}
+
+void
+serial_unref (struct serial *scb)
+{
+  --scb->refcnt;
+  if (scb->refcnt == 0)
+    xfree (scb);
+}
+
 int
 serial_readchar (struct serial *scb, int timeout)
 {