QUIC: automatically add and never delete stream events. Previously, stream events were added and deleted by ngx_handle_read_event() and ngx_handle_write_event() in a way similar to level-triggered events. However, QUIC stream events are effectively edge-triggered and can stay active all time. Moreover, the events are now active since the moment a stream is created.

/*
 * Copyright (C) Maxim Dounin
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>


#if (NGX_HAVE_DLOPEN)

char *
ngx_dlerror(void)
{
    char  *err;

    err = (char *) dlerror();

    if (err == NULL) {
        return "";
    }

    return err;
}

#endif