view src/os/win32/ngx_errno.h @ 6536:f7849bfb6d21

Improved EPOLLRDHUP handling. When it's known that the kernel supports EPOLLRDHUP, there is no need in additional recv() call to get EOF or error when the flag is absent in the event generated by the kernel. A special runtime test is done at startup to detect if EPOLLRDHUP is actually supported by the kernel because epoll_ctl() silently ignores unknown flags. With this knowledge it's now possible to drop the "ready" flag for partial read. Previously, the "ready" flag was kept until the recv() returned EOF or error. In particular, this change allows the lingering close heuristics (which relies on the "ready" flag state) to actually work on Linux, and not wait for more data in most cases. The "available" flag is now used in the read event with the semantics similar to the corresponding counter in kqueue.
author Valentin Bartenev <vbart@nginx.com>
date Fri, 13 May 2016 17:19:23 +0300
parents 7cdf612fd58c
children
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_ERRNO_H_INCLUDED_
#define _NGX_ERRNO_H_INCLUDED_


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


typedef DWORD                      ngx_err_t;

#define ngx_errno                  GetLastError()
#define ngx_set_errno(err)         SetLastError(err)
#define ngx_socket_errno           WSAGetLastError()
#define ngx_set_socket_errno(err)  WSASetLastError(err)

#define NGX_EPERM                  ERROR_ACCESS_DENIED
#define NGX_ENOENT                 ERROR_FILE_NOT_FOUND
#define NGX_ENOPATH                ERROR_PATH_NOT_FOUND
#define NGX_ENOMEM                 ERROR_NOT_ENOUGH_MEMORY
#define NGX_EACCES                 ERROR_ACCESS_DENIED
/*
 * there are two EEXIST error codes:
 * ERROR_FILE_EXISTS used by CreateFile(CREATE_NEW),
 * and ERROR_ALREADY_EXISTS used by CreateDirectory();
 * MoveFile() uses both
 */
#define NGX_EEXIST                 ERROR_ALREADY_EXISTS
#define NGX_EEXIST_FILE            ERROR_FILE_EXISTS
#define NGX_EXDEV                  ERROR_NOT_SAME_DEVICE
#define NGX_ENOTDIR                ERROR_PATH_NOT_FOUND
#define NGX_EISDIR                 ERROR_CANNOT_MAKE
#define NGX_ENOSPC                 ERROR_DISK_FULL
#define NGX_EPIPE                  EPIPE
#define NGX_EAGAIN                 WSAEWOULDBLOCK
#define NGX_EINPROGRESS            WSAEINPROGRESS
#define NGX_ENOPROTOOPT            WSAENOPROTOOPT
#define NGX_EOPNOTSUPP             WSAEOPNOTSUPP
#define NGX_EADDRINUSE             WSAEADDRINUSE
#define NGX_ECONNABORTED           WSAECONNABORTED
#define NGX_ECONNRESET             WSAECONNRESET
#define NGX_ENOTCONN               WSAENOTCONN
#define NGX_ETIMEDOUT              WSAETIMEDOUT
#define NGX_ECONNREFUSED           WSAECONNREFUSED
#define NGX_ENAMETOOLONG           ERROR_BAD_PATHNAME
#define NGX_ENETDOWN               WSAENETDOWN
#define NGX_ENETUNREACH            WSAENETUNREACH
#define NGX_EHOSTDOWN              WSAEHOSTDOWN
#define NGX_EHOSTUNREACH           WSAEHOSTUNREACH
#define NGX_ENOMOREFILES           ERROR_NO_MORE_FILES
#define NGX_EILSEQ                 ERROR_NO_UNICODE_TRANSLATION
#define NGX_ELOOP                  0
#define NGX_EBADF                  WSAEBADF

#define NGX_EALREADY               WSAEALREADY
#define NGX_EINVAL                 WSAEINVAL
#define NGX_EMFILE                 WSAEMFILE
#define NGX_ENFILE                 WSAEMFILE


u_char *ngx_strerror(ngx_err_t err, u_char *errstr, size_t size);
ngx_int_t ngx_strerror_init(void);


#endif /* _NGX_ERRNO_H_INCLUDED_ */