1 files changed, 60 insertions, 0 deletions
diff --git a/Userland/Libraries/LibC/sched.cpp b/Userland/Libraries/LibC/sched.cpp
new file mode 100644
index 0000000000..4e3643bd01
--- /dev/null
+++ b/Userland/Libraries/LibC/sched.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <Kernel/API/Syscall.h>
+#include <errno.h>
+#include <sched.h>
+
+extern "C" {
+
+int sched_yield()
+{
+    int rc = syscall(SC_yield);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int sched_get_priority_min([[maybe_unused]] int policy)
+{
+    return 0; // Idle
+}
+
+int sched_get_priority_max([[maybe_unused]] int policy)
+{
+    return 3; // High
+}
+
+int sched_setparam(pid_t pid, const struct sched_param* param)
+{
+    int rc = syscall(SC_sched_setparam, pid, param);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int sched_getparam(pid_t pid, struct sched_param* param)
+{
+    int rc = syscall(SC_sched_getparam, pid, param);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+}