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


char *ngx_http_set_busy_lock_slot(ngx_conf_t *cf, ngx_command_t *cmd,
                                  void *conf)
{
    char  *p = conf;

    int                    i;
    ngx_str_t             *value;
    ngx_http_busy_lock_t  *bl, **blp;

    blp = (ngx_http_busy_lock_t **) (p + cmd->offset);
    if (*blp) {
        return "is duplicate";
    }

    /* ngx_calloc_shared() */
    if (!(bl = ngx_pcalloc(cf->pool, sizeof(ngx_http_busy_lock_t)))) {
        return NGX_CONF_ERROR;
    }
    *blp = bl;

    value = (ngx_str_t *) cf->args->elts;

    for (i = 1; i < 3; i++) {

        if (value[i].len > 2 && ngx_strncasecmp(value[i].data, "c:", 2) == 0) {
            if (bl->max_conn) {
                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "duplicate \"%s\"", value[i].data);
                return NGX_CONF_ERROR;
            }

            bl->max_conn = ngx_atoi(value[i].data + 2, value[i].len - 2);
            if (bl->max_conn == NGX_ERROR) {
                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid value \"%s\"", value[i].data);
                return NGX_CONF_ERROR;
            }

            continue;
        }

        if (value[i].len > 2 && ngx_strncasecmp(value[i].data, "w:", 2) == 0) {
            if (bl->max_waiting) {
                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "duplicate \"%s\"", value[i].data);
                return NGX_CONF_ERROR;
            }

            bl->max_waiting = ngx_atoi(value[i].data + 2, value[i].len - 2);
            if (bl->max_waiting == NGX_ERROR) {
                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid value \"%s\"", value[i].data);
                return NGX_CONF_ERROR;
            }

            continue;
        }

        if (bl->timeout) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "duplicate timeout \"%s\"", value[i].data);
            return NGX_CONF_ERROR;
        }

        bl->timeout = ngx_parse_time(&value[1], 0);
        if (bl->timeout == NGX_ERROR) {
            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                               "invalid timeout \"%s\"", value[i].data);
            return NGX_CONF_ERROR;
        }
    }

    return NGX_CONF_OK;
}