named_mutex(create_only_t create_only, const char * name, 
            const permissions & perm = permissions());

Creates a global mutex with a name. Throws interprocess_exception on error.

named_mutex(open_or_create_t open_or_create, const char * name, 
            const permissions & perm = permissions());

Opens or creates a global mutex with a name. If the mutex is created, this call is equivalent to named_mutex(create_only_t, ... ) If the mutex is already created, this call is equivalent named_mutex(open_only_t, ... ) Does not throw

named_mutex(open_only_t open_only, const char * name);

Opens a global mutex with a name if that mutex is previously created. If it is not previously created this function throws interprocess_exception.

~named_mutex();

Destroys *this and indicates that the calling process is finished using the resource. The destructor function will deallocate any system resources allocated by the system for use by this process for this resource. The resource can still be opened again calling the open constructor overload. To erase the resource from the system use remove().

void unlock();

Unlocks a previously locked mutex.

void lock();

Locks the mutex, sleeps when the mutex is already locked. Throws interprocess_exception if a severe error is found

bool try_lock();

Tries to lock the mutex, returns false when the mutex is already locked, returns true when success. Throws interprocess_exception if a severe error is found

bool timed_lock(const boost::posix_time::ptime & abs_time);

Tries to lock the the mutex until time abs_time, Returns false when timeout expires, returns true when locks. Throws interprocess_exception if a severe error is found

static bool remove(const char * name);

Erases a named mutex from the system. Returns false on error. Never throws.