1 files changed, 102 insertions, 0 deletions
diff --git a/include/sitecing/scoreboard.h b/include/sitecing/scoreboard.h
new file mode 100644
index 0000000..788f881
--- a/dev/null
+++ b/include/sitecing/scoreboard.h
@@ -0,0 +1,102 @@
+#ifndef __SITECING_SCOREBOARD_H
+#define __SITECING_SCOREBOARD_H
+
+#include <sys/types.h>
+
+/**
+ * @file
+ * @brief the scoreboard manager.
+ */
+
+/**
+ * @def MAX_SITECING_SCOREBOARD_SLOTS
+ * The maximum number of slots scoreboard can hold.
+ */
+#define	MAX_SITECING_SCOREBOARD_SLOTS	512
+
+namespace sitecing {
+  
+    /**
+     * The scoreboard slot.
+     */
+    struct scoreboard_slot {
+	/**
+	 * The state enumeration.
+	 */
+	enum _state {
+	    /**
+	     * The slot is free.
+	     */
+	    state_free = 0,
+	    /**
+	     * The slot is allocated.
+	     */
+	    state_allocated,
+	    /**
+	     * The process is idle.
+	     */
+	    state_idle,
+	    /**
+	     * The process is accepting connection.
+	     */
+	    state_accept,
+	    /**
+	     * The process is processing request.
+	     */
+	    state_processing
+	}   state;
+	pid_t pid;
+    };
+
+    /**
+     * The scoreboard manager.
+     */
+    class scoreboard {
+	/**
+	 * shared memory id.
+	 */
+	int shmid;
+	public:
+	    /**
+	     * Pointer to the scoreboard slots.
+	     */
+	    scoreboard_slot *slots;
+
+	    scoreboard();
+	    ~scoreboard();
+
+	    /**
+	     * Allocate a scoreboard slot.
+	     * @return the slot number.
+	     */
+	    int allocate_slot();
+	    /**
+	     * Free the slot allocated.
+	     * @param slot the slot number.
+	     */
+	    void free_slot(int slot);
+
+	    /**
+	     * Get the pointer to the slot.
+	     * @param slot the slot number.
+	     * @return the pointer.
+	     */
+	    scoreboard_slot *get_slot(int slot);
+	    /**
+	     * Find the slot corresponding to the process ID.
+	     * @param pid the process id.
+	     * @return the slot number.
+	     */
+	    int get_slot_by_pid(pid_t pid);
+
+	    /**
+	     * Count the slots in the particular state.
+	     * @param state the state.
+	     * @return the number of slots found.
+	     */
+	    int count_slots(enum scoreboard_slot::_state state=scoreboard_slot::state_free);
+    };
+
+}
+
+#endif /* __SITECING_SCOREBOARD_H */