pop and push to queue

src/util.zig

@@ -21,6 +21,7 @@ pub const JobQueue = struct {
     job_pool: JobPool,
 
     const Self = @This();
+    const Node = Self.Node;
 
     pub fn init(pool: JobPool) Self {
         return Self {
@@ -29,6 +30,23 @@ pub const JobQueue = struct {
             .job_pool = pool,
         };
     }
+
+    pub fn prepend(self: *Self, job: Job) void {
+        self.mutex.lock();
+        defer self.mutex.unlock();
+        var n = try self.job_pool.create(Node);
+        n.data = job;
+        return self.queue.prepend(n);
+    }
+
+    pub fn pop(self: *Self) ?Job {
+        self.mutex.lock();
+        defer self.mutex.unlock();
+        const n = self.queue.pop() orelse return null;
+        const job = n.data;
+        self.job_pool.destroy(n);
+        return job;
+    }
 };
 pub const JobPool = std.heap.MemoryPool(Job);