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_SLOTS512
+
+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 */