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view src/os/unix/ngx_darwin_config.h @ 7583:efd71d49bde0

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Events: available bytes calculation via ioctl(FIONREAD). This makes it possible to avoid looping for a long time while working with a fast enough peer when data are added to the socket buffer faster than we are able to read and process them (ticket #1431). This is basically what we already do on FreeBSD with kqueue, where information about the number of bytes in the socket buffer is returned by the kevent() call. With other event methods rev->available is now set to -1 when the socket is ready for reading. Later in ngx_recv() and ngx_recv_chain(), if full buffer is received, real number of bytes in the socket buffer is retrieved using ioctl(FIONREAD). Reading more than this number of bytes ensures that even with edge-triggered event methods the event will be triggered again, so it is safe to stop processing of the socket and switch to other connections. Using ioctl(FIONREAD) only after reading a full buffer is an optimization. With this approach we only call ioctl(FIONREAD) when there are at least two recv()/readv() calls.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 17 Oct 2019 16:02:19 +0300
parents 9fb994513776
children 93bbb9fbf30d
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_DARWIN_CONFIG_H_INCLUDED_
#define _NGX_DARWIN_CONFIG_H_INCLUDED_


#define __APPLE_USE_RFC_3542    /* IPV6_PKTINFO */


#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stddef.h>             /* offsetof() */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <pwd.h>
#include <grp.h>
#include <dirent.h>
#include <glob.h>
#include <sys/mount.h>          /* statfs() */

#include <sys/filio.h>          /* FIONBIO */
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sched.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>        /* TCP_NODELAY */
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/un.h>

#include <sys/sysctl.h>
#include <xlocale.h>

#include <dlfcn.h>


#ifndef IOV_MAX
#define IOV_MAX   64
#endif


#include <ngx_auto_config.h>


#if (NGX_HAVE_POSIX_SEM)
#include <semaphore.h>
#endif


#if (NGX_HAVE_POLL)
#include <poll.h>
#endif


#if (NGX_HAVE_KQUEUE)
#include <sys/event.h>
#endif


#define NGX_LISTEN_BACKLOG  -1


#ifndef NGX_HAVE_INHERITED_NONBLOCK
#define NGX_HAVE_INHERITED_NONBLOCK  1
#endif


#ifndef NGX_HAVE_CASELESS_FILESYSTEM
#define NGX_HAVE_CASELESS_FILESYSTEM  1
#endif


#define NGX_HAVE_OS_SPECIFIC_INIT    1
#define NGX_HAVE_DEBUG_MALLOC        1


extern char **environ;


#endif /* _NGX_DARWIN_CONFIG_H_INCLUDED_ */