From 629028da1e01c0d745d45dd4e12c96fcb20c9169 Mon Sep 17 00:00:00 2001
From: rswindell <>
Date: Wed, 18 Jul 2001 20:04:19 +0000
Subject: [PATCH] Added yield function to reduce DOS program CPU hogging.
Eliminated unused code.
---
src/sbbs3/dosxtrn/dosxtrn.c | 44 ++-----------------------------------
1 file changed, 2 insertions(+), 42 deletions(-)
diff --git a/src/sbbs3/dosxtrn/dosxtrn.c b/src/sbbs3/dosxtrn/dosxtrn.c
index ef2f554208..d2cf8d362e 100644
--- a/src/sbbs3/dosxtrn/dosxtrn.c
+++ b/src/sbbs3/dosxtrn/dosxtrn.c
@@ -132,8 +132,6 @@ void vdd_getstatus(vdd_status_t* status)
memset(status,0,sizeof(vdd_status_t));
}
-#if 1
-
WORD PortStatus()
{
WORD status=0x0008; // AL bit 3 (change in DCD) always set
@@ -157,50 +155,12 @@ WORD PortStatus()
if(!vdd_status.outbuf_full) // output buffer is empty
status|=0x4000; // TSRE
- return(status);
-}
-
-#else
-
-WORD PortStatus()
-{
- WORD status=0x0008; // AL bit 3 (change in DCD) always set
- static poll;
- static online=1;
- static outbuf_full;
- static outbuf_size;
-
- if(!poll)
- outbuf_size=vdd_op(VDD_OUTBUF_SIZE);
-
- if(!(poll%500)) {
- online=vdd_op(VDD_ONLINE);
- outbuf_full=vdd_op(VDD_OUTBUF_FULL);
- }
-
- if(online) // carrier detect
- status|=0x0080; // DCD
-
- if(vdd_op(VDD_INBUF_FULL)) // receive data ready
- status|=0x0100; // RDA
-
-// if(vm->overrun) // overrun error detected
-// status|=0x0200; // OVRN
-
- if(outbuf_full
- <outbuf_size/2) // room available in output buffer
- status|=0x2000; // THRE
-
- if(!outbuf_full) // output buffer is empty
- status|=0x4000; // TSRE
-
- poll++;
+ if(!vdd_status.inbuf_full) // release time-slice if no input
+ vdd_op(VDD_YIELD);
return(status);
}
-#endif
-
void interrupt winNTint14(
unsigned _es, unsigned _ds,
unsigned _di, unsigned _si,
--
GitLab