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annotate src/os/unix/ngx_os.h @ 5913:8e903522c17a

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Introduced the ngx_output_chain_to_iovec() function. It deduplicates code of the send chain functions and uses only preallocated memory, which completely solves the problem mentioned in d1bde5c3c5d2.
author Valentin Bartenev <vbart@nginx.com>
date Tue, 07 Oct 2014 11:38:57 +0400
parents ec81934727a1
children 2c64b69daec5
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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5 */
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4c698194c56d nginx-0.0.1-2003-11-13-19:16:33 import
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8 #ifndef _NGX_OS_H_INCLUDED_
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9 #define _NGX_OS_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 #define NGX_IO_SENDFILE 1
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4c698194c56d nginx-0.0.1-2003-11-13-19:16:33 import
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5659d773cfa8 nginx-0.0.7-2004-07-15-20:35:51 import
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19 typedef ssize_t (*ngx_recv_pt)(ngx_connection_t *c, u_char *buf, size_t size);
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20 typedef ssize_t (*ngx_recv_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
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21 off_t limit);
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22 typedef ssize_t (*ngx_send_pt)(ngx_connection_t *c, u_char *buf, size_t size);
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23 typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
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24 off_t limit);
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26 typedef struct {
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27 ngx_recv_pt recv;
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28 ngx_recv_chain_pt recv_chain;
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0b592a68aade ngx_udp_recv()
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29 ngx_recv_pt udp_recv;
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30 ngx_send_pt send;
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31 ngx_send_chain_pt send_chain;
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32 ngx_uint_t flags;
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33 } ngx_os_io_t;
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35
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36 ngx_int_t ngx_os_init(ngx_log_t *log);
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37 void ngx_os_status(ngx_log_t *log);
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38 ngx_int_t ngx_os_specific_init(ngx_log_t *log);
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39 void ngx_os_specific_status(ngx_log_t *log);
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40 ngx_int_t ngx_daemon(ngx_log_t *log);
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41 ngx_int_t ngx_os_signal_process(ngx_cycle_t *cycle, char *sig, ngx_int_t pid);
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44 ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
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45 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *entry, off_t limit);
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46 ssize_t ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
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47 ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
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48 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in,
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49 off_t limit);
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50
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51 #if (NGX_HAVE_AIO)
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52 ssize_t ngx_aio_read(ngx_connection_t *c, u_char *buf, size_t size);
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53 ssize_t ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl, off_t limit);
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54 ssize_t ngx_aio_write(ngx_connection_t *c, u_char *buf, size_t size);
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55 ngx_chain_t *ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in,
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56 off_t limit);
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57 #endif
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58
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59
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60 #if (IOV_MAX > 64)
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61 #define NGX_IOVS_PREALLOCATE 64
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62 #else
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63 #define NGX_IOVS_PREALLOCATE IOV_MAX
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64 #endif
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65
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66
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67 typedef struct {
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68 struct iovec *iovs;
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69 ngx_uint_t count;
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70 size_t size;
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71 ngx_uint_t nalloc;
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72 } ngx_iovec_t;
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73
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74 ngx_chain_t *ngx_output_chain_to_iovec(ngx_iovec_t *vec, ngx_chain_t *in,
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75 size_t limit, ngx_log_t *log);
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78 extern ngx_os_io_t ngx_os_io;
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79 extern ngx_int_t ngx_ncpu;
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80 extern ngx_int_t ngx_max_sockets;
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81 extern ngx_uint_t ngx_inherited_nonblocking;
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82 extern ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush;
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84
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85 #if (NGX_FREEBSD)
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86 #include <ngx_freebsd.h>
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88
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89 #elif (NGX_LINUX)
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90 #include <ngx_linux.h>
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92
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93 #elif (NGX_SOLARIS)
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94 #include <ngx_solaris.h>
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96
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97 #elif (NGX_DARWIN)
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98 #include <ngx_darwin.h>
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99 #endif
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101
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102 #endif /* _NGX_OS_H_INCLUDED_ */