Function RM_SendChildHeartbeat

app/redis-6.2.6/src/module.c:7882–7884

The module is advised to call this function from the fork child once in a while, * so that it can report progress and COW memory to the parent which will be * reported in INFO. * The `progress` argument should between 0 and 1, or -1 when not available. */

 * reported in INFO.
 * The `progress` argument should between 0 and 1, or -1 when not available. */
void RM_SendChildHeartbeat(double progress) {
    sendChildInfoGeneric(CHILD_INFO_TYPE_CURRENT_INFO, 0, progress, "Module fork");
}

/* Call from the child process when you want to terminate it.
 * retcode will be provided to the done handler executed on the parent process.