1
2/*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8#ifndef _NGX_OS_H_INCLUDED_
9#define _NGX_OS_H_INCLUDED_
10
11
12#include <ngx_config.h>
13#include <ngx_core.h>
14
15
16#define NGX_IO_SENDFILE    1
17
18
19typedef ssize_t (*ngx_recv_pt)(ngx_connection_t *c, u_char *buf, size_t size);
20typedef ssize_t (*ngx_recv_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
21    off_t limit);
22typedef ssize_t (*ngx_send_pt)(ngx_connection_t *c, u_char *buf, size_t size);
23typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
24    off_t limit);
25
26typedef struct {
27    ngx_recv_pt        recv;
28    ngx_recv_chain_pt  recv_chain;
29    ngx_recv_pt        udp_recv;
30    ngx_send_pt        send;
31    ngx_send_pt        udp_send;
32    ngx_send_chain_pt  udp_send_chain;
33    ngx_send_chain_pt  send_chain;
34    ngx_uint_t         flags;
35} ngx_os_io_t;
36
37
38ngx_int_t ngx_os_init(ngx_log_t *log);
39void ngx_os_status(ngx_log_t *log);
40ngx_int_t ngx_os_specific_init(ngx_log_t *log);
41void ngx_os_specific_status(ngx_log_t *log);
42ngx_int_t ngx_daemon(ngx_log_t *log);
43ngx_int_t ngx_os_signal_process(ngx_cycle_t *cycle, char *sig, ngx_pid_t pid);
44
45
46ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
47ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *entry, off_t limit);
48ssize_t ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
49ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
50ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in,
51    off_t limit);
52ssize_t ngx_udp_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
53ngx_chain_t *ngx_udp_unix_sendmsg_chain(ngx_connection_t *c, ngx_chain_t *in,
54    off_t limit);
55
56
57#if (IOV_MAX > 64)
58#define NGX_IOVS_PREALLOCATE  64
59#else
60#define NGX_IOVS_PREALLOCATE  IOV_MAX
61#endif
62
63
64typedef struct {
65    struct iovec  *iovs;
66    ngx_uint_t     count;
67    size_t         size;
68    ngx_uint_t     nalloc;
69} ngx_iovec_t;
70
71ngx_chain_t *ngx_output_chain_to_iovec(ngx_iovec_t *vec, ngx_chain_t *in,
72    size_t limit, ngx_log_t *log);
73
74
75ssize_t ngx_writev(ngx_connection_t *c, ngx_iovec_t *vec);
76
77
78extern ngx_os_io_t  ngx_os_io;
79extern ngx_int_t    ngx_ncpu;
80extern ngx_int_t    ngx_max_sockets;
81extern ngx_uint_t   ngx_inherited_nonblocking;
82extern ngx_uint_t   ngx_tcp_nodelay_and_tcp_nopush;
83
84
85#if (NGX_FREEBSD)
86#include <ngx_freebsd.h>
87
88
89#elif (NGX_LINUX)
90#include <ngx_linux.h>
91
92
93#elif (NGX_SOLARIS)
94#include <ngx_solaris.h>
95
96
97#elif (NGX_DARWIN)
98#include <ngx_darwin.h>
99#endif
100
101
102#endif /* _NGX_OS_H_INCLUDED_ */
103