[12315] Ensure files open for driver have stdio buffering turned off

livecodepanos · livecodepanos · commit 086d790aa525 · 2019-05-31T09:56:25.000+03:00
diff --git a/docs/notes/bugfix-12315.md b/docs/notes/bugfix-12315.md
@@ -0,0 +1 @@
+# Ensure write to serial port has an immediate result
diff --git a/engine/src/dsklnx.cpp b/engine/src/dsklnx.cpp
@@ -1260,6 +1260,7 @@ class MCLinuxDesktop: public MCSystemInterface
 
         if (t_fptr != NULL)
         {
+            setbuf(t_fptr, nullptr);
             configureSerialPort((short)fileno(t_fptr));
 
             t_handle = new (nothrow) MCStdioFileHandle(t_fptr);
diff --git a/engine/src/dskmac.cpp b/engine/src/dskmac.cpp
@@ -4087,6 +4087,7 @@ struct MCMacDesktop: public MCSystemInterface, public MCMacSystemService
         
 		if (fptr != NULL)
         {
+            setbuf(fptr, nullptr);
             int val;
             int t_serial_in;
             

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+# Ensure write to serial port has an immediate result`
Original file line number	Diff line number	Diff line change
`@@ -1260,6 +1260,7 @@ class MCLinuxDesktop: public MCSystemInterface`
`1260`	`1260`
`1261`	`1261`	`if (t_fptr != NULL)`
`1262`	`1262`	`{`
	`1263`	`+ setbuf(t_fptr, nullptr);`
`1263`	`1264`	`configureSerialPort((short)fileno(t_fptr));`
`1264`	`1265`
`1265`	`1266`	`t_handle = new (nothrow) MCStdioFileHandle(t_fptr);`
Original file line number	Diff line number	Diff line change
`@@ -4087,6 +4087,7 @@ struct MCMacDesktop: public MCSystemInterface, public MCMacSystemService`
`4087`	`4087`
`4088`	`4088`	`if (fptr != NULL)`
`4089`	`4089`	`{`
	`4090`	`+ setbuf(fptr, nullptr);`
`4090`	`4091`	`int val;`
`4091`	`4092`	`int t_serial_in;`
`4092`	`4093`