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#ifndef AVBTS_OSLOCK_HPP
#define AVBTS_OSLOCK_HPP

/**@file*/

/**
 * @brief Lock type enumeration. The possible values are:
 * 	- oslock_recursive;
 * 	- oslock_nonrecursive;
 */
typedef enum { oslock_recursive, oslock_nonrecursive } OSLockType;
/**
 * @brief Lock result enumeration. The possible values are:
 * 	- oslock_ok;
 * 	- oslock_self;
 * 	- oslock_held;
 * 	- oslock_fail;
 */
typedef enum { oslock_ok, oslock_self, oslock_held, oslock_fail } OSLockResult;

/**
 * @brief Provides a generic mechanism for locking critical sections.
 */
class OSLock {
	public:
		/**
		 * @brief  Locks a critical section
		 * @return OSLockResult enumeration
		 */
		virtual OSLockResult lock() = 0;

		/**
		 * @brief  Unlocks a critical section
		 * @return OSLockResult enumeration
		 */
		virtual OSLockResult unlock() = 0;

		/**
		 * @brief  Tries locking a critical section
		 * @return OSLockResult enumeration
		 */
		virtual OSLockResult trylock() = 0;
	protected:
		/**
		 * @brief Default constructor
		 */
		OSLock() { }

		/**
		 * @brief  Initializes locking mechanism
		 * @param  type Enumeration OSLockType
		 * @return FALSE
		 */
		bool initialize(OSLockType type) {
			return false;
		}
		virtual ~OSLock() = 0;
};

inline OSLock::~OSLock() {}

/**
 * @brief Provides a factory pattern for OSLock
 */
class OSLockFactory {
	public:

		/**
		 * @brief  Creates locking mechanism
		 * @param  type Enumeration OSLockType
		 * @return Pointer to an enumeration of type OSLock
		 */
		virtual OSLock *createLock(OSLockType type) const = 0;
		virtual ~OSLockFactory() = 0;
};

inline OSLockFactory::~OSLockFactory () {}

#endif
