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-rw-r--r--src/basic/missing_ioprio.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/basic/missing_ioprio.h b/src/basic/missing_ioprio.h
new file mode 100644
index 0000000..9cbd172
--- /dev/null
+++ b/src/basic/missing_ioprio.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <sched.h>
+
+/* Match values uses by the kernel internally, as no public header seems to exist. */
+
+#ifndef IOPRIO_N_CLASSES
+# define IOPRIO_N_CLASSES 8
+#endif
+
+#ifndef IOPRIO_BE_NR
+# define IOPRIO_BE_NR 8
+#endif
+
+#ifndef IOPRIO_CLASS_NONE
+# define IOPRIO_CLASS_NONE 0
+#endif
+#ifndef IOPRIO_CLASS_RT
+# define IOPRIO_CLASS_RT 1
+#endif
+#ifndef IOPRIO_CLASS_BE
+# define IOPRIO_CLASS_BE 2
+#endif
+#ifndef IOPRIO_CLASS_IDLE
+# define IOPRIO_CLASS_IDLE 3
+#endif
+
+#ifndef IOPRIO_WHO_PROCESS
+# define IOPRIO_WHO_PROCESS 1
+#endif
+#ifndef IOPRIO_WHO_PGRP
+# define IOPRIO_WHO_PGRP 2
+#endif
+#ifndef IOPRIO_WHO_USER
+# define IOPRIO_WHO_USER 3
+#endif
+
+#ifndef IOPRIO_BITS
+# define IOPRIO_BITS 16
+#endif
+#ifndef IOPRIO_N_CLASSES
+# define IOPRIO_N_CLASSES 8
+#endif
+#ifndef IOPRIO_CLASS_SHIFT
+# define IOPRIO_CLASS_SHIFT 13
+#endif
+
+static inline int ioprio_prio_class(int value) {
+ return value >> IOPRIO_CLASS_SHIFT;
+}
+
+static inline int ioprio_prio_data(int value) {
+ return value & ((1 << IOPRIO_CLASS_SHIFT) - 1);
+}
+
+static inline int ioprio_prio_value(int class, int data) {
+ return (class << IOPRIO_CLASS_SHIFT) | data;
+}