Used to define pointers to functions that will be implemented by the client but called from a (different) shared library.


#include <prtypes.h>type PR_CALLBACKimplementation


Functions that are implemented in an application (or shared library) that are intended to be called from another shared library (such as NSPR) must be declared with the PR_CALLBACK attribute. Normally such functions are passed by reference (pointer to function). The PR_CALLBACK attribute is included as part of the function's definition between its return value type and the function's name.

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