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comparison src/os/unix/ngx_files.h @ 3178:975f0558aab3

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read_ahead
author Igor Sysoev <igor@sysoev.ru>
date Wed, 30 Sep 2009 13:21:52 +0000
parents 6060225e9261
children 26784c34e8be
comparison
equal deleted inserted replaced
3177:adc4fc0c3cc3 3178:975f0558aab3
252 #define ngx_trylock_fd_n "fcntl(F_SETLK, F_WRLCK)" 252 #define ngx_trylock_fd_n "fcntl(F_SETLK, F_WRLCK)"
253 #define ngx_lock_fd_n "fcntl(F_SETLKW, F_WRLCK)" 253 #define ngx_lock_fd_n "fcntl(F_SETLKW, F_WRLCK)"
254 #define ngx_unlock_fd_n "fcntl(F_SETLK, F_UNLCK)" 254 #define ngx_unlock_fd_n "fcntl(F_SETLK, F_UNLCK)"
255 255
256 256
257 #if (NGX_HAVE_F_READAHEAD)
258
259 #define NGX_HAVE_READ_AHEAD 1
260
261 #define ngx_read_ahead(fd, n) fcntl(fd, F_READAHEAD, (int) n)
262 #define ngx_read_ahead_n "fcntl(fd, F_READAHEAD)"
263
264 #elif (NGX_HAVE_POSIX_FADVISE)
265
266 #define NGX_HAVE_READ_AHEAD 1
267
268 #define ngx_read_ahead(fd, n) posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL)
269 #define ngx_read_ahead_n "posix_fadvise(POSIX_FADV_SEQUENTIAL)"
270
271 #else
272
273 #define ngx_read_ahead(fd, n) 0
274 #define ngx_read_ahead_n "ngx_read_ahead_n"
275
276 #endif
277
278
257 #if (NGX_HAVE_O_DIRECT) 279 #if (NGX_HAVE_O_DIRECT)
258 280
259 ngx_int_t ngx_directio_on(ngx_fd_t fd); 281 ngx_int_t ngx_directio_on(ngx_fd_t fd);
260 #define ngx_directio_on_n "fcntl(O_DIRECT)" 282 #define ngx_directio_on_n "fcntl(O_DIRECT)"
261 283