2f86930e3690f482c34a2fd7c523ba4d2c316677
2 Basic socket buffered IO
6 #include "memcached_io.h"
7 #include <sys/select.h>
9 ssize_t
memcached_io_read(memcached_st
*ptr
, unsigned int server_key
,
10 char *buffer
, size_t length
)
17 for (x
= 0, buffer_ptr
= buffer
;
20 if (!ptr
->read_buffer_length
)
26 data_read
= recv(ptr
->hosts
[server_key
].fd
,
45 if (ptr
->flags
& MEM_NO_BLOCK
)
47 struct timeval local_tv
;
50 memset(&local_tv
, 0, sizeof(struct timeval
));
53 local_tv
.tv_usec
= 300;
56 FD_SET(ptr
->hosts
[server_key
].fd
, &set
);
58 select(1, &set
, NULL
, NULL
, &local_tv
);
61 data_read
= recv(ptr
->hosts
[server_key
].fd
,
63 MEMCACHED_MAX_BUFFER
, 0);
70 ptr
->read_buffer_length
= data_read
;
71 ptr
->read_ptr
= ptr
->read_buffer
;
74 if (ptr
->read_buffer_length
== -1)
76 if (ptr
->read_buffer_length
== 0)
79 *buffer_ptr
= *ptr
->read_ptr
;
82 ptr
->read_buffer_length
--;
88 ssize_t
memcached_io_write(memcached_st
*ptr
, unsigned int server_key
,
89 char *buffer
, size_t length
, char with_flush
)
93 for (x
= 0; x
< length
; x
++)
95 ptr
->write_buffer
[ptr
->write_buffer_offset
]= buffer
[x
];
96 ptr
->write_buffer_offset
++;
98 if (ptr
->write_buffer_offset
== MEMCACHED_MAX_BUFFER
)
102 sent_length
= memcached_io_flush(ptr
, server_key
);
104 assert(sent_length
== MEMCACHED_MAX_BUFFER
);
105 ptr
->write_buffer_offset
= 0;
111 if (memcached_io_flush(ptr
, server_key
) == -1)
118 ssize_t
memcached_io_flush(memcached_st
*ptr
, unsigned int server_key
)
121 char *write_ptr
= ptr
->write_buffer
;
122 size_t write_length
= ptr
->write_buffer_offset
;
123 unsigned int loop
= 1;
125 if (ptr
->write_buffer_offset
== 0)
130 if (ptr
->flags
& MEM_NO_BLOCK
)
135 struct timeval local_tv
;
140 local_tv
.tv_usec
= 300 * loop
;
143 FD_SET(ptr
->hosts
[server_key
].fd
, &set
);
145 select_return
= select(1, NULL
, &set
, NULL
, &local_tv
);
147 if (select_return
== -1)
149 ptr
->my_errno
= errno
;
152 else if (!select_return
)
158 if ((sent_length
= send(ptr
->hosts
[server_key
].fd
, write_ptr
,
159 write_length
, 0)) == -1)
170 /* Yes, we want to fall through */
172 ptr
->my_errno
= errno
;
178 write_ptr
+= sent_length
;
179 write_length
-= sent_length
;
183 ptr
->write_buffer_offset
= 0;
189 Eventually we will just kill off the server with the problem.
191 void memcached_io_reset(memcached_st
*ptr
, unsigned int server_key
)
193 ptr
->write_buffer_offset
= 0;