Range filter: changed type for total length to off_t. Total length of a response with multiple ranges can be larger than a size_t variable can hold, so type changed to off_t. Previously, an incorrect Content-Length was returned when requesting more than 4G of ranges from a large enough file on a 32-bit system. An additional size_t variable introduced to calculate size of the boundary header buffer, as off_t is not needed here and will require type casts on win32. Reported by Shuxin Yang, http://mailman.nginx.org/pipermail/nginx/2017-July/054384.html.

/*
 * Copyright (C) Ruslan Ermilov
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_RWLOCK_H_INCLUDED_
#define _NGX_RWLOCK_H_INCLUDED_


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


void ngx_rwlock_wlock(ngx_atomic_t *lock);
void ngx_rwlock_rlock(ngx_atomic_t *lock);
void ngx_rwlock_unlock(ngx_atomic_t *lock);
void ngx_rwlock_downgrade(ngx_atomic_t *lock);


#endif /* _NGX_RWLOCK_H_INCLUDED_ */