Mercurial > hg > nginx
annotate src/os/unix/ngx_freebsd_sendfile_chain.c @ 9314:32a5186a2705
Win32: improved MinGW/MinGW-w64 GCC checks.
Previously, __GNUC__ was checked, which is now replaced with __MINGW32__
checks. The difference is that __MINGW32__ is defined when using MinGW
(or MinGW-w64) header files regardless of the compiler being used. And,
more importantly, it is not defined when Clang is being used (which
pretends to be GCC by default) with Windows SDK header files.
With this change, it is now possible to compile nginx with native Clang
on Windows. This current requires --with-ld-opt="-lkernel32 -luser32"
though, since native Clang on Windows uses MSVC linker, which does
not link kernel32.lib and user32.lib automatically.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 07 Aug 2024 03:56:59 +0300 |
parents | b002ad258f1d |
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rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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13 /* |
479 | 14 * Although FreeBSD sendfile() allows to pass a header and a trailer, |
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15 * it cannot send a header with a part of the file in one packet until |
479 | 16 * FreeBSD 5.3. Besides, over the fast ethernet connection sendfile() |
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17 * may send the partially filled packets, i.e. the 8 file pages may be sent |
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18 * as the 11 full 1460-bytes packets, then one incomplete 324-bytes packet, |
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19 * and then again the 11 full 1460-bytes packets. |
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20 * |
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21 * Therefore we use the TCP_NOPUSH option (similar to Linux's TCP_CORK) |
479 | 22 * to postpone the sending - it not only sends a header and the first part of |
23 * the file in one packet, but also sends the file pages in the full packets. | |
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24 * |
501 | 25 * But until FreeBSD 4.5 turning TCP_NOPUSH off does not flush a pending |
26 * data that less than MSS, so that data may be sent with 5 second delay. | |
27 * So we do not use TCP_NOPUSH on FreeBSD prior to 4.5, although it can be used | |
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28 * for non-keepalive HTTP connections. |
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29 */ |
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30 |
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31 |
501 | 32 ngx_chain_t * |
33 ngx_freebsd_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) | |
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34 { |
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35 int rc, flags; |
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36 off_t send, prev_send, sent; |
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37 size_t file_size; |
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38 ssize_t n; |
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39 ngx_err_t err; |
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40 ngx_buf_t *file; |
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41 ngx_uint_t eintr, eagain; |
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42 #if (NGX_HAVE_SENDFILE_NODISKIO) |
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43 ngx_uint_t ebusy; |
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44 #endif |
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45 ngx_event_t *wev; |
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46 ngx_chain_t *cl; |
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47 ngx_iovec_t header, trailer; |
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48 struct sf_hdtr hdtr; |
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49 struct iovec headers[NGX_IOVS_PREALLOCATE]; |
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50 struct iovec trailers[NGX_IOVS_PREALLOCATE]; |
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51 |
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52 wev = c->write; |
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53 |
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54 if (!wev->ready) { |
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55 return in; |
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56 } |
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57 |
469 | 58 #if (NGX_HAVE_KQUEUE) |
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59 |
587 | 60 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) && wev->pending_eof) { |
537 | 61 (void) ngx_connection_error(c, wev->kq_errno, |
62 "kevent() reported about an closed connection"); | |
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63 wev->error = 1; |
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64 return NGX_CHAIN_ERROR; |
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65 } |
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66 |
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67 #endif |
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68 |
473 | 69 /* the maximum limit size is the maximum size_t value - the page size */ |
70 | |
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71 if (limit == 0 || limit > (off_t) (NGX_MAX_SIZE_T_VALUE - ngx_pagesize)) { |
477 | 72 limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; |
473 | 73 } |
74 | |
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75 send = 0; |
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76 eagain = 0; |
3065 | 77 flags = 0; |
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78 |
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79 header.iovs = headers; |
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80 header.nalloc = NGX_IOVS_PREALLOCATE; |
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81 |
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82 trailer.iovs = trailers; |
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83 trailer.nalloc = NGX_IOVS_PREALLOCATE; |
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84 |
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85 for ( ;; ) { |
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86 eintr = 0; |
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87 #if (NGX_HAVE_SENDFILE_NODISKIO) |
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88 ebusy = 0; |
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89 #endif |
473 | 90 prev_send = send; |
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91 |
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92 /* create the header iovec and coalesce the neighbouring bufs */ |
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93 |
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94 cl = ngx_output_chain_to_iovec(&header, in, limit - send, c->log); |
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95 |
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96 if (cl == NGX_CHAIN_ERROR) { |
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97 return NGX_CHAIN_ERROR; |
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98 } |
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99 |
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100 send += header.size; |
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101 |
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102 if (cl && cl->buf->in_file && send < limit) { |
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103 file = cl->buf; |
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104 |
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105 /* coalesce the neighbouring file bufs */ |
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106 |
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107 file_size = (size_t) ngx_chain_coalesce_file(&cl, limit - send); |
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108 |
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109 send += file_size; |
455 | 110 |
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111 if (send < limit) { |
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112 |
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113 /* |
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114 * create the trailer iovec and coalesce the neighbouring bufs |
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115 */ |
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116 |
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117 cl = ngx_output_chain_to_iovec(&trailer, cl, limit - send, |
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118 c->log); |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
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parents:
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diff
changeset
|
119 if (cl == NGX_CHAIN_ERROR) { |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
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parents:
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diff
changeset
|
120 return NGX_CHAIN_ERROR; |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
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parents:
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diff
changeset
|
121 } |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
122 |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
123 send += trailer.size; |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
124 |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
125 } else { |
7cc2d3a96ea3
Fixed trailer construction with limit on FreeBSD and macOS.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
126 trailer.count = 0; |
5913
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5912
diff
changeset
|
127 } |
4596
089cc5154c1e
IOV_MAX handling microoptimization.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4572
diff
changeset
|
128 |
344
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
129 if (ngx_freebsd_use_tcp_nopush |
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
130 && c->tcp_nopush == NGX_TCP_NOPUSH_UNSET) |
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
131 { |
7239
400a3412b1e3
Fixed checking ngx_tcp_push() and ngx_tcp_nopush() return values.
Ruslan Ermilov <ru@nginx.com>
parents:
6874
diff
changeset
|
132 if (ngx_tcp_nopush(c->fd) == -1) { |
5557
188481078faf
Use ngx_socket_errno where appropriate.
Piotr Sikora <piotr@cloudflare.com>
parents:
5320
diff
changeset
|
133 err = ngx_socket_errno; |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
134 |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
135 /* |
479 | 136 * there is a tiny chance to be interrupted, however, |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
137 * we continue a processing without the TCP_NOPUSH |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
138 */ |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
139 |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
140 if (err != NGX_EINTR) { |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
141 wev->error = 1; |
537 | 142 (void) ngx_connection_error(c, err, |
143 ngx_tcp_nopush_n " failed"); | |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
144 return NGX_CHAIN_ERROR; |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
145 } |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
146 |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
147 } else { |
344
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
148 c->tcp_nopush = NGX_TCP_NOPUSH_SET; |
e366ba5db8f8
nginx-0.0.3-2004-06-01-10:04:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
343
diff
changeset
|
149 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
150 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, |
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
151 "tcp_nopush"); |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
152 } |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
153 } |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
154 |
4335
1003326eccc5
Microoptimization of sendfile(2) usage under FreeBSD.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4133
diff
changeset
|
155 /* |
1003326eccc5
Microoptimization of sendfile(2) usage under FreeBSD.
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parents:
4133
diff
changeset
|
156 * sendfile() does unneeded work if sf_hdtr's count is 0, |
1003326eccc5
Microoptimization of sendfile(2) usage under FreeBSD.
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parents:
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diff
changeset
|
157 * but corresponding pointer is not NULL |
1003326eccc5
Microoptimization of sendfile(2) usage under FreeBSD.
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parents:
4133
diff
changeset
|
158 */ |
1003326eccc5
Microoptimization of sendfile(2) usage under FreeBSD.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4133
diff
changeset
|
159 |
5913
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5912
diff
changeset
|
160 hdtr.headers = header.count ? header.iovs : NULL; |
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
161 hdtr.hdr_cnt = header.count; |
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
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parents:
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diff
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|
162 hdtr.trailers = trailer.count ? trailer.iovs : NULL; |
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
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parents:
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diff
changeset
|
163 hdtr.trl_cnt = trailer.count; |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
164 |
153
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
152
diff
changeset
|
165 /* |
155
46eb23d9471d
nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents:
154
diff
changeset
|
166 * the "nbytes bug" of the old sendfile() syscall: |
5727
675bda8dcfdb
FreeBSD has migrated to Bugzilla.
Sergey Kandaurov <pluknet@nginx.com>
parents:
5557
diff
changeset
|
167 * http://bugs.freebsd.org/33771 |
153
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
152
diff
changeset
|
168 */ |
c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
152
diff
changeset
|
169 |
479 | 170 if (!ngx_freebsd_sendfile_nbytes_bug) { |
5913
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5912
diff
changeset
|
171 header.size = 0; |
63
36d2c25cc9bb
nginx-0.0.1-2003-02-26-23:21:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
172 } |
36d2c25cc9bb
nginx-0.0.1-2003-02-26-23:21:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
173 |
203
c9da5900c79e
nginx-0.0.1-2003-12-02-08:47:29 import
Igor Sysoev <igor@sysoev.ru>
parents:
201
diff
changeset
|
174 sent = 0; |
c9da5900c79e
nginx-0.0.1-2003-12-02-08:47:29 import
Igor Sysoev <igor@sysoev.ru>
parents:
201
diff
changeset
|
175 |
7985
ec2e6893caaa
Simplified sendfile(SF_NODISKIO) usage.
Maxim Dounin <mdounin@mdounin.ru>
parents:
7974
diff
changeset
|
176 #if (NGX_HAVE_SENDFILE_NODISKIO) |
7987
b002ad258f1d
Support for sendfile(SF_NOCACHE).
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parents:
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diff
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|
177 |
7985
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Simplified sendfile(SF_NODISKIO) usage.
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diff
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|
178 flags = (c->busy_count <= 2) ? SF_NODISKIO : 0; |
7987
b002ad258f1d
Support for sendfile(SF_NOCACHE).
Maxim Dounin <mdounin@mdounin.ru>
parents:
7985
diff
changeset
|
179 |
b002ad258f1d
Support for sendfile(SF_NOCACHE).
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parents:
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diff
changeset
|
180 if (file->file->directio) { |
b002ad258f1d
Support for sendfile(SF_NOCACHE).
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diff
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|
181 flags |= SF_NOCACHE; |
b002ad258f1d
Support for sendfile(SF_NOCACHE).
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
182 } |
b002ad258f1d
Support for sendfile(SF_NOCACHE).
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
183 |
3065 | 184 #endif |
185 | |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
186 rc = sendfile(file->file->fd, c->fd, file->file_pos, |
5913
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5912
diff
changeset
|
187 file_size + header.size, &hdtr, &sent, flags); |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
188 |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
189 if (rc == -1) { |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
190 err = ngx_errno; |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
191 |
3063
6f6d7ea70805
refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
diff
changeset
|
192 switch (err) { |
6f6d7ea70805
refactor EAGAIN/EINTR processing
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parents:
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diff
changeset
|
193 case NGX_EAGAIN: |
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refactor EAGAIN/EINTR processing
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parents:
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diff
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|
194 eagain = 1; |
6f6d7ea70805
refactor EAGAIN/EINTR processing
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parents:
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diff
changeset
|
195 break; |
216
f1d0e5f09c1e
nginx-0.0.1-2003-12-25-23:26:58 import
Igor Sysoev <igor@sysoev.ru>
parents:
214
diff
changeset
|
196 |
3063
6f6d7ea70805
refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
diff
changeset
|
197 case NGX_EINTR: |
6f6d7ea70805
refactor EAGAIN/EINTR processing
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parents:
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diff
changeset
|
198 eintr = 1; |
6f6d7ea70805
refactor EAGAIN/EINTR processing
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parents:
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diff
changeset
|
199 break; |
152
fb48bf4fea1c
nginx-0.0.1-2003-10-21-11:47:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
200 |
7985
ec2e6893caaa
Simplified sendfile(SF_NODISKIO) usage.
Maxim Dounin <mdounin@mdounin.ru>
parents:
7974
diff
changeset
|
201 #if (NGX_HAVE_SENDFILE_NODISKIO) |
3065 | 202 case NGX_EBUSY: |
5980
ccad84a174e0
Refactored sendfile() AIO preload.
Valentin Bartenev <vbart@nginx.com>
parents:
5917
diff
changeset
|
203 ebusy = 1; |
3065 | 204 break; |
205 #endif | |
206 | |
3063
6f6d7ea70805
refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
diff
changeset
|
207 default: |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
163
diff
changeset
|
208 wev->error = 1; |
537 | 209 (void) ngx_connection_error(c, err, "sendfile() failed"); |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
210 return NGX_CHAIN_ERROR; |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
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parents:
94
diff
changeset
|
211 } |
3063
6f6d7ea70805
refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
diff
changeset
|
212 |
6f6d7ea70805
refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
diff
changeset
|
213 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, err, |
6f6d7ea70805
refactor EAGAIN/EINTR processing
Igor Sysoev <igor@sysoev.ru>
parents:
1354
diff
changeset
|
214 "sendfile() sent only %O bytes", sent); |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
215 |
483 | 216 /* |
217 * sendfile() in FreeBSD 3.x-4.x may return value >= 0 | |
218 * on success, although only 0 is documented | |
219 */ | |
220 | |
3080 | 221 } else if (rc >= 0 && sent == 0) { |
455 | 222 |
223 /* | |
483 | 224 * if rc is OK and sent equal to zero, then someone |
225 * has truncated the file, so the offset became beyond | |
226 * the end of the file | |
455 | 227 */ |
228 | |
229 ngx_log_error(NGX_LOG_ALERT, c->log, 0, | |
3081
10bfdd8d5eb9
log offset passed to sendfile()
Igor Sysoev <igor@sysoev.ru>
parents:
3080
diff
changeset
|
230 "sendfile() reported that \"%s\" was truncated at %O", |
10bfdd8d5eb9
log offset passed to sendfile()
Igor Sysoev <igor@sysoev.ru>
parents:
3080
diff
changeset
|
231 file->file->name.data, file->file_pos); |
455 | 232 |
233 return NGX_CHAIN_ERROR; | |
234 } | |
235 | |
214
e0c502f15852
nginx-0.0.1-2003-12-22-12:40:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
203
diff
changeset
|
236 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 237 "sendfile: %d, @%O %O:%uz", |
5913
8e903522c17a
Introduced the ngx_output_chain_to_iovec() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5912
diff
changeset
|
238 rc, file->file_pos, sent, file_size + header.size); |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
239 |
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
240 } else { |
5917
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
241 n = ngx_writev(c, &header); |
216
f1d0e5f09c1e
nginx-0.0.1-2003-12-25-23:26:58 import
Igor Sysoev <igor@sysoev.ru>
parents:
214
diff
changeset
|
242 |
5917
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
243 if (n == NGX_ERROR) { |
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
244 return NGX_CHAIN_ERROR; |
143
5526213be452
nginx-0.0.1-2003-10-10-19:10:50 import
Igor Sysoev <igor@sysoev.ru>
parents:
142
diff
changeset
|
245 } |
89
29bf798b583f
nginx-0.0.1-2003-05-15-19:42:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
88
diff
changeset
|
246 |
5917
2c64b69daec5
Moved writev() handling code to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents:
5916
diff
changeset
|
247 sent = (n == NGX_AGAIN) ? 0 : n; |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
248 } |
63
36d2c25cc9bb
nginx-0.0.1-2003-02-26-23:21:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
249 |
96
a23d010f356d
nginx-0.0.1-2003-05-27-16:18:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
94
diff
changeset
|
250 c->sent += sent; |
63
36d2c25cc9bb
nginx-0.0.1-2003-02-26-23:21:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
251 |
5912
de68ed551bfb
Renamed ngx_handle_sent_chain() to ngx_chain_update_sent().
Valentin Bartenev <vbart@nginx.com>
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252 in = ngx_chain_update_sent(in, sent); |
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253 |
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254 #if (NGX_HAVE_SENDFILE_NODISKIO) |
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255 |
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256 if (ebusy) { |
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257 if (sent == 0) { |
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258 c->busy_count++; |
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259 |
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260 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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261 "sendfile() busy, count:%d", c->busy_count); |
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262 |
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263 } else { |
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264 c->busy_count = 0; |
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265 } |
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266 |
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267 if (wev->posted) { |
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268 ngx_delete_posted_event(wev); |
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269 } |
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270 |
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271 ngx_post_event(wev, &ngx_posted_next_events); |
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272 |
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273 wev->ready = 0; |
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274 return in; |
3065 | 275 } |
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276 |
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277 c->busy_count = 0; |
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278 |
3065 | 279 #endif |
280 | |
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281 if (eagain) { |
155
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282 |
153
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283 /* |
479 | 284 * sendfile() may return EAGAIN, even if it has sent a whole file |
285 * part, it indicates that the successive sendfile() call would | |
253
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286 * return EAGAIN right away and would not send anything. |
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287 * We use it as a hint. |
153
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288 */ |
155
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289 |
170
c42be4185301
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290 wev->ready = 0; |
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291 return in; |
362
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292 } |
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293 |
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294 if (eintr) { |
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295 send = prev_send + sent; |
362
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296 continue; |
152
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297 } |
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298 |
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299 if (send - prev_send != sent) { |
362
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300 wev->ready = 0; |
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301 return in; |
362
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302 } |
152
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303 |
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304 if (send >= limit || in == NULL) { |
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305 return in; |
362
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306 } |
142
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307 } |
63
36d2c25cc9bb
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308 } |