1 files changed, 61 insertions, 0 deletions

diff --git a/src/itomutex.h b/src/itomutex.h
new file mode 100644
index 0000000..80956b8
--- /dev/null
+++ b/src/itomutex.h
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+#ifndef ITO_MUTEX_H
+#define ITO_MUTEX_H
+
+#include <pthread.h>
+
+namespace Bu
+{
+        /**
+         * Simple mutex wrapper.  Currently this doesn't do anything extra for you
+         * except keep all of the functionality together in an OO sorta' way and keep
+         * you from having to worry about cleaning up your mutexes properly, or initing
+         * them.
+         *@author Mike Buland
+         */
+        class ItoMutex
+        {
+        public:
+                /**
+                 * Create an unlocked mutex.
+                 */
+                ItoMutex();
+                
+                /**
+                 * Destroy a mutex.  This can only be done when a mutex is unlocked.
+                 * Failure to unlock before destroying a mutex object could cause it to
+                 * wait for the mutex to unlock, the odds of which are usually farily low
+                 * at deconstruction time.
+                 */
+                ~ItoMutex();
+
+                /**
+                 * Lock the mutex.  This causes all future calls to lock on this instance
+                 * of mutex to block until the first thread that called mutex unlocks it.
+                 * At that point the next thread that called lock will get a chance to go
+                 * to work.  Because of the nature of a mutex lock it is a very bad idea to
+                 * do any kind of serious or rather time consuming computation within a
+                 * locked section.  This can cause thread-deadlock and your program may
+                 * hang.
+                 */
+                int lock();
+
+                /**
+                 * Unlock the mutex.  This allows the next thread that asked for a lock to
+                 * lock the mutex and continue with execution.
+                 */
+                int unlock();
+
+                /**
+                 * Try to lock the mutex.  This is the option to go with if you cannot avoid
+                 * putting lengthy operations within a locked section.  trylock will attempt
+                 * to lock the mutex, if the mutex is already locked this function returns
+                 * immediately with an error code.
+                 */
+                int trylock();
+
+        protected:
+                pthread_mutex_t mutex;  /**< The internal mutex reference. */
+        };
+}
+
+#endif