From a76ef70a1469a892f712549afda41511220462cf Mon Sep 17 00:00:00 2001
From: Stu Grossman <grossman@cygnus>
Date: Fri, 3 Feb 1995 19:35:54 +0000
Subject: 	* core.c (dis_asm_read_memory), defs.h, gdbtk.c
 (gdb_disassemble), 	top.c :  Get rid of dis_asm_read_memory_hook.  We can
 now call the 	disassemblers directly and have no need for this hook anymore.
 	* defs.h, printcmd.c:  Make print_insn be static.

	* ser-go32.c (dos_comisr):  Make this 8 bit clean.
	* (dos_open dos_close):  Allow multiple opens to the same device.
	Use a ref count to prevent unwanted deallocations.
	* sparcl-tdep.c:  Put #ifdefs around all socket stuff to make GO32
	happy.
	* (sparclite_ops):  Switch to download_stratum.
	* target.h (enum strata):  Move download_stratum before
	process_stratum so that executable targets get pushed on top of
	download targets.
---
 gdb/ser-go32.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'gdb/ser-go32.c')

diff --git a/gdb/ser-go32.c b/gdb/ser-go32.c
index a1c0b6e..b4a7591 100644
--- a/gdb/ser-go32.c
+++ b/gdb/ser-go32.c
@@ -196,6 +196,7 @@ static struct dos_ttystate
 {
   int		base;
   int		irq;
+  int		refcnt;
   struct intrupt *intrupt;
   int		fifo;
   int		baudrate;
@@ -311,7 +312,7 @@ dos_comisr (irq)
 		    port->oflo++;
 		}
 
-	      if (dos_putc (c & 0x7f, port) < 0)
+	      if (dos_putc (c, port) < 0)
 		{
 		  COUNT (CNT_ORUN);
 		}
@@ -474,11 +475,11 @@ dos_open (scb, name)
 
   fd = name[3] - '1';
   port = &ports[fd];
-  if (port->intrupt)
+  if (port->refcnt++ > 0)
     {
-      /* already open (EBUSY not defined!) */
-      errno = EACCES;
-      return -1;
+      /* Device already opened another user.  Just point at it. */
+      scb->fd = fd;
+      return 0;
     }
 
   /* force access to ID reg */
@@ -559,6 +560,10 @@ dos_close (scb)
       return;
 
     port = &ports[scb->fd];
+
+    if (port->refcnt-- > 1)
+      return;
+
     if (!(intrupt = port->intrupt))
       return;
 
-- 
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