Question

Using C++, in one of my destructors, i say

mutex = NULL;

This however results in an error “No viable overloaded '='” in my Xcode.

Same mutex was previously initialized in a constructor as

mutex = PTHREAD_MUTEX_INITIALIZER;

Please advise, how can i properly handle this as part of C++ destructor

Answer 1

You may use pthread_mutex_destroy() to destroy the mutex object.

According to the POSIX specification:

The pthread_mutex_destroy() function
shall destroy the mutex object
referenced by mutex; the mutex object
becomes, in effect, uninitialized. An
implementation may cause
pthread_mutex_destroy() to set the
object referenced by mutex to an
invalid value. A destroyed mutex
object can be reinitialized using
pthread_mutex_init(); the results of
otherwise referencing the object after
it has been destroyed are undefined.