feature [posix]: Add bindings to scheduler policy (#3831)

posixlib/src/main/resources/scala-native/sched.c

@@ -0,0 +1,44 @@
+#if defined(__unix__) || defined(__unix) || defined(unix) ||                   \
+    (defined(__APPLE__) && defined(__MACH__))
+
+#include <sched.h>
+
+int scalanative_sched_other() { return SCHED_OTHER; }
+
+int scalanative_sched_fifo() { return SCHED_FIFO; }
+
+int scalanative_sched_rr() { return SCHED_RR; }
+
+int scalanative_sched_sporadic() {
+#ifdef SCHED_SPORADIC
+    return SCHED_SPORADIC;
+#else
+    return SCHED_OTHER;
+#endif
+}
+
+int scalanative_sched_batch() {
+#ifdef SCHED_BATCH
+    return SCHED_BATCH;
+#else
+    return SCHED_OTHER;
+#endif
+}
+
+int scalanative_sched_idle() {
+#ifdef SCHED_IDLE
+    return SCHED_IDLE;
+#else
+    return SCHED_OTHER;
+#endif
+}
+
+int scalanative_sched_deadline() {
+#ifdef SCHED_DEADLINE
+    return SCHED_DEADLINE;
+#else
+    return SCHED_OTHER;
+#endif
+}
+
+#endif // Unix or Mac OS

posixlib/src/main/scala/scala/scalanative/posix/sched.scala

@@ -41,6 +41,30 @@ object sched {
       cpuset: Ptr[cpu_set_t]
   ): CInt = extern
 
+  @name("scalanative_sched_other")
+  def SCHED_OTHER: CInt = extern
+
+  @name("scalanative_sched_fifo")
+  def SCHED_FIFO: CInt = extern
+
+  @name("scalanative_sched_rr")
+  def SCHED_RR: CInt = extern
+
+  @name("scalanative_sched_sporadic")
+  def SCHED_SPORADIC: CInt = extern
+
+  /** Not defined in POSIX standard, might lead to runtime errors */
+  @name("scalanative_sched_batch")
+  def SCHED_BATCH: CInt = extern
+
+  /** Not defined in POSIX standard, might lead to runtime errors */
+  @name("scalanative_sched_idle")
+  def SCHED_IDLE: CInt = extern
+
+  /** Not defined in POSIX standard, might lead to runtime errors */
+  @name("scalanative_sched_deadline")
+  def SCHED_DEADLINE: CInt = extern
+
   // Types
   type cpu_set_t = CInt