Copy filter: wake up subrequests after aio operations. Previously, connection write handler was called, resulting in wake up of the active subrequest. This change makes it possible to read data in non-active subrequests as well. For example, this allows SSI to process instructions in non-active subrequests earlier and start additional subrequests if needed, reducing overall response time.

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


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


char *
ngx_dlerror(void)
{
    u_char         *p;
    static u_char   errstr[NGX_MAX_ERROR_STR];

    p = ngx_strerror(ngx_errno, errstr, NGX_MAX_ERROR_STR);
    *p = '\0';

    return (char *) errstr;
}