Added time.sleep function

examples/thread/thread.q

@@ -1,5 +1,6 @@
 import sys
 import thread
+import time
 
 main() {
 	thread.create(work)
@@ -10,6 +11,7 @@ main() {
 
 work() {
 	sys.write(1, "[ ] start\n", 10)
+	time.sleep(10 * 1000 * 1000)
 	sys.write(1, "[x] end\n", 8)
 	sys.exit(0)
 }

lib/sys/sys_linux.q

@@ -22,8 +22,8 @@ munmap(address Pointer, length Int) -> Int {
 	return syscall(11, address, length)
 }
 
-nanosleep(requested Pointer, remaining Pointer) -> Int {
+nanosleep(timespec Pointer) -> Int {
-	return syscall(35, requested, remaining)
+	return syscall(35, timespec, 0)
 }
 
 clone(flags Int, stack Pointer) -> Int {

lib/time/time.q

@@ -0,0 +1,21 @@
+import mem
+import sys
+
+sleep(nanoseconds Int) {
+	seconds := 0
+
+	loop {
+		if nanoseconds >= 1000000000 {
+			nanoseconds = nanoseconds - 1000000000
+			seconds += 1
+		} else {
+			timespec := mem.alloc(16)
+			store(timespec, 8, seconds)
+			offset := timespec + 8
+			store(offset, 8, nanoseconds)
+			sys.nanosleep(timespec)
+			mem.free(timespec, 16)
+			return
+		}
+	}
+}