Fixed portability issues with union sigval. AIO support in nginx was originally developed against FreeBSD versions 4-6, where the sival_ptr field was named as sigval_ptr (seemingly by mistake[1]), which made nginx use the only name available then. The standard-complaint name was restored in 2005 (first appeared in FreeBSD 7.0, 2008), retaining compatibility with previous versions[2][3]. In DragonFly, similar changes were committed in 2009[4], with backward compatibility recently removed[5]. The change switches to the standard name, retaining compatibility with old FreeBSD versions. [1] https://svnweb.freebsd.org/changeset/base/48621 [2] https://svnweb.freebsd.org/changeset/base/152029 [3] https://svnweb.freebsd.org/changeset/base/174003 [4] https://gitweb.dragonflybsd.org/dragonfly.git/commit/3693401 [5] https://gitweb.dragonflybsd.org/dragonfly.git/commit/7875042

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_ALLOC_H_INCLUDED_
#define _NGX_ALLOC_H_INCLUDED_


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


void *ngx_alloc(size_t size, ngx_log_t *log);
void *ngx_calloc(size_t size, ngx_log_t *log);

#define ngx_free          free


/*
 * Linux has memalign() or posix_memalign()
 * Solaris has memalign()
 * FreeBSD 7.0 has posix_memalign(), besides, early version's malloc()
 * aligns allocations bigger than page size at the page boundary
 */

#if (NGX_HAVE_POSIX_MEMALIGN || NGX_HAVE_MEMALIGN)

void *ngx_memalign(size_t alignment, size_t size, ngx_log_t *log);

#else

#define ngx_memalign(alignment, size, log)  ngx_alloc(size, log)

#endif


extern ngx_uint_t  ngx_pagesize;
extern ngx_uint_t  ngx_pagesize_shift;
extern ngx_uint_t  ngx_cacheline_size;


#endif /* _NGX_ALLOC_H_INCLUDED_ */