nginx 0.8.7 *) Change: minimum supported OpenSSL version is 0.9.7. *) Change: the "ask" parameter of the "ssl_verify_client" directive was changed to the "optional" parameter and now it checks a client certificate if it was offered. Thanks to Brice Figureau. *) Feature: the $ssl_client_verify variable. Thanks to Brice Figureau. *) Feature: the "ssl_crl" directive. Thanks to Brice Figureau. *) Feature: the "proxy" parameter of the "geo" directive. *) Feature: the "image_filter" directive supports variables for setting size. *) Bugfix: the $ssl_client_cert variable usage corrupted memory; the bug had appeared in 0.7.7. Thanks to Sergey Zhuravlev. *) Bugfix: "proxy_pass_header" and "fastcgi_pass_header" directives did not pass to a client the "X-Accel-Redirect", "X-Accel-Limit-Rate", "X-Accel-Buffering", and "X-Accel-Charset" lines from backend response header. Thanks to Maxim Dounin. *) Bugfix: in handling "Last-Modified" and "Accept-Ranges" backend response header lines; the bug had appeared in 0.7.44. Thanks to Maxim Dounin. *) Bugfix: the "[alert] zero size buf" error if subrequest returns an empty response; the bug had appeared in 0.8.5.

/*
 * Copyright (C) Igor Sysoev
 */


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


#if (NGX_HAVE_ATOMIC_OPS)


ngx_int_t
ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
{
    mtx->lock = addr;

    return NGX_OK;
}

#else


ngx_int_t
ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
{
    if (mtx->name) {

        if (ngx_strcmp(name, mtx->name) == 0) {
            mtx->name = name;
            return NGX_OK;
        }

        ngx_shmtx_destory(mtx);
    }

    mtx->fd = ngx_open_file(name, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN,
                            NGX_FILE_DEFAULT_ACCESS);

    if (mtx->fd == NGX_INVALID_FILE) {
        ngx_log_error(NGX_LOG_EMERG, ngx_cycle->log, ngx_errno,
                      ngx_open_file_n " \"%s\" failed", name);
        return NGX_ERROR;
    }

    if (ngx_delete_file(name) == NGX_FILE_ERROR) {
        ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
                      ngx_delete_file_n " \"%s\" failed", name);
    }

    mtx->name = name;

    return NGX_OK;
}


void
ngx_shmtx_destory(ngx_shmtx_t *mtx)
{
    if (ngx_close_file(mtx->fd) == NGX_FILE_ERROR) {
        ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
                      ngx_close_file_n " \"%s\" failed", mtx->name);
    }
}


#endif