Wait for one tick in case no character is available after a call to
getchark(). Otherwise the system is constantly busy within an input
loop (for example in the RTEMS shell). The polled Termios driver uses
the same approach.
---
cpukit/libcsupport/src/consolesimpleread.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/cpukit/libcsupport/src/consolesimpleread.c
b/cpukit/libcsupport/src/consolesimpleread.c
index a796e4380f..737b441d99 100644
--- a/cpukit/libcsupport/src/consolesimpleread.c
+++ b/cpukit/libcsupport/src/consolesimpleread.c
@@ -33,9 +33,14 @@ ssize_t _Console_simple_Read(
for ( i = 0; i < n; ++i ) {
int c;
- do {
+ while ( true ) {
c = getchark();
- } while (c == -1);
+ if ( c != -1 ) {
+ break;
+ }
+
+ (void) rtems_task_wake_after( 1 );
+ }
buf[ i ] = (char) c;
}
--
2.16.4
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