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- The purpose of callbacks is for the quick and efficient use of functions within other function. Because you have a direct pointer to the callback function's address, you have immediate access to it. This makes callbacks versatile and re-usable. Lets take a look at some examples of the use of callbacks in our projects:
Ex 1) Status code:
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#include "status.h"
#include <stdlib.h>
static Status s_global_status = {
.source = "", //
.caller = "", //
.message = "", //
};
static status_callback s_callback;
StatusCode status_impl_update(const StatusCode code, const char* source, const char* caller,
const char* message) {
s_global_status.code = code;
s_global_status.source = source;
s_global_status.caller = caller;
s_global_status.message = message;
if (s_callback != NULL) {
s_callback(&s_global_status);
}
return code;
}
Status status_get(void) {
return s_global_status;
}
void status_register_callback(status_callback callback) {
s_callback = callback;
}
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