Add time constant

Src/Platform.rux

@@ -11,13 +11,16 @@ module Platform {
         Munmap,
         Read,
         Syscall1,
+        Syscall2,
         Stdin,
         Stdout,
         Write,
         MAP_ANONYMOUS,
         MAP_PRIVATE,
         PROT_READ,
         PROT_WRITE,
+        SYS_NANOSLEEP,
+        SYS_CLOCK_GETTIME,
         SYS_EXIT
     };
 

Src/Syscall.rux

@@ -19,6 +19,11 @@ module Linux {
     const SYS_BRK: uint64 = 12u64;
     const SYS_GETPID: uint64 = 39u64;
     const SYS_EXIT: uint64 = 60u64;
+    const SYS_NANOSLEEP: uint64 = 35u64;
+    const SYS_CLOCK_GETTIME: uint64 = 228u64;
+
+    const CLOCK_REALTIME: int32 = 0i32;
+    const CLOCK_MONOTONIC: int32 = 1i32;
 
     // mmap protection and mapping flags used by Mmap.
     const PROT_READ: int32 = 1i32;
@@ -28,6 +33,12 @@ module Linux {
     const MAP_PRIVATE: int32 = 2i32;
     const MAP_ANONYMOUS: int32 = 32i32;
 
+    // Kernel-level time structures for low-level interaction.
+    struct Timespec {
+        tv_sec: int64;
+        tv_nsec: int64;
+    }
+
     @[Import(lib: "rux-linux")]
     extern {
         // Provided by the Rux Linux ELF linker. These wrappers return raw
@@ -103,6 +114,18 @@ module Linux {
         return Syscall1(SYS_BRK, addr as uint64);
     }
 
+    /*
+        Linux Time Functions (Passthrough to the Linux API)
+    */
+
+    func Nanosleep(req: *const Timespec, rem: *Timespec) -> int64 {
+        return Syscall2(SYS_NANOSLEEP, req as uint64, rem as uint64);
+    }
+
+    func ClockGetTime(clockId: int32, tp: *Timespec) -> int64 {
+        return Syscall2(SYS_CLOCK_GETTIME, clockId as uint64, tp as uint64);
+    }
+
     // Linux reports syscall errors as -errno in the range -4095..-1.
     func IsError(result: int64) -> bool {
         return result < 0i64 && result >= -4095i64;