Function to be called when starting a critical initialization
section. The argument @location must point to a static
0-initialized variable that will be set to a value other than 0 at
the end of the initialization section. In combination with
g_once_init_leave() and the unique address @value_location, it can
be ensured that an initialization section will be executed only once
during a program's life time, and that concurrent threads are
blocked until initialization completed. To be used in constructs
like this:
Function to be called when starting a critical initialization section. The argument @location must point to a static 0-initialized variable that will be set to a value other than 0 at the end of the initialization section. In combination with g_once_init_leave() and the unique address @value_location, it can be ensured that an initialization section will be executed only once during a program's life time, and that concurrent threads are blocked until initialization completed. To be used in constructs like this:
|[<!-- language="C" --> static gsize initialization_value = 0;
if (g_once_init_enter (&initialization_value)) { gsize setup_value = 42; // initialization code here
g_once_init_leave (&initialization_value, setup_value); }
// use initialization_value here ]|
While @location has a volatile qualifier, this is a historical artifact and the pointer passed to it should not be volatile.