Implement nice() for Windows

[fio.git] / os / windows / posix.c

diff --git a/os/windows/posix.c b/os/windows/posix.c
index 3388127821acadc5d4053689f1246efd3be96af3..bbd93e979522e098d9a438e0ccfdc10da0b89ec0 100755 (executable)
--- a/os/windows/posix.c
+++ b/os/windows/posix.c
@@ -647,10 +647,19 @@ int setgid(gid_t gid)
 
 int nice(int incr)
 {
-       if (incr != 0) {
-               errno = EINVAL;
-               return -1;
-       }
+       DWORD prioclass = NORMAL_PRIORITY_CLASS;
+       
+       if (incr < -15)
+               prioclass = HIGH_PRIORITY_CLASS;
+       else if (incr < 0)
+               prioclass = ABOVE_NORMAL_PRIORITY_CLASS;
+       else if (incr > 15)
+               prioclass = IDLE_PRIORITY_CLASS;
+       else if (incr > 0)
+               prioclass = BELOW_NORMAL_PRIORITY_CLASS;
+       
+       if (!SetPriorityClass(GetCurrentProcess(), prioclass))
+               log_err("fio: SetPriorityClass failed\n");
 
        return 0;
 }