Struct

GLibOnce

since: 2.4

Description [src]

struct GOnce {
  volatile GOnceStatus status;
  volatile gpointer retval;
}

A GOnce struct controls a one-time initialization function. Any one-time initialization function must have its own unique GOnce struct.

Structure members
status: GOnceStatus

The status of the GOnce.

retval: volatile gpointer

The value returned by the call to the function, if status is G_ONCE_STATUS_READY.

Available since: 2.4

Functions

g_once_init_enter

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:.

since: 2.14

g_once_init_enter_impl
No description available.

g_once_init_enter_pointer

This functions behaves in the same way as g_once_init_enter(), but can can be used to initialize pointers (or #guintptr) instead of #gsize.

since: 2.80

g_once_init_leave

Counterpart to g_once_init_enter(). Expects a location of a static 0-initialized initialization variable, and an initialization value other than 0. Sets the variable to the initialization value, and releases concurrent threads blocking in g_once_init_enter() on this initialization variable.

since: 2.14

g_once_init_leave_pointer

Counterpart to g_once_init_enter_pointer(). Expects a location of a static NULL-initialized initialization variable, and an initialization value other than NULL. Sets the variable to the initialization value, and releases concurrent threads blocking in g_once_init_enter_pointer() on this initialization variable.

since: 2.80

Instance methods

g_once_impl
No description available.