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ruanhaishen
redis
Commits
d08fac3e
Commit
d08fac3e
authored
Oct 25, 2010
by
antirez
Browse files
more generally usable i/o functions moved to syncio.c
parent
19e61097
Changes
3
Hide whitespace changes
Inline
Side-by-side
src/aof.c
View file @
d08fac3e
...
@@ -314,55 +314,6 @@ fmterr:
...
@@ -314,55 +314,6 @@ fmterr:
exit
(
1
);
exit
(
1
);
}
}
/* Write binary-safe string into a file in the bulkformat
* $<count>\r\n<payload>\r\n */
int
fwriteBulkString
(
FILE
*
fp
,
char
*
s
,
unsigned
long
len
)
{
char
cbuf
[
128
];
int
clen
;
cbuf
[
0
]
=
'$'
;
clen
=
1
+
ll2string
(
cbuf
+
1
,
sizeof
(
cbuf
)
-
1
,
len
);
cbuf
[
clen
++
]
=
'\r'
;
cbuf
[
clen
++
]
=
'\n'
;
if
(
fwrite
(
cbuf
,
clen
,
1
,
fp
)
==
0
)
return
0
;
if
(
len
>
0
&&
fwrite
(
s
,
len
,
1
,
fp
)
==
0
)
return
0
;
if
(
fwrite
(
"
\r\n
"
,
2
,
1
,
fp
)
==
0
)
return
0
;
return
1
;
}
/* Write a double value in bulk format $<count>\r\n<payload>\r\n */
int
fwriteBulkDouble
(
FILE
*
fp
,
double
d
)
{
char
buf
[
128
],
dbuf
[
128
];
snprintf
(
dbuf
,
sizeof
(
dbuf
),
"%.17g
\r\n
"
,
d
);
snprintf
(
buf
,
sizeof
(
buf
),
"$%lu
\r\n
"
,(
unsigned
long
)
strlen
(
dbuf
)
-
2
);
if
(
fwrite
(
buf
,
strlen
(
buf
),
1
,
fp
)
==
0
)
return
0
;
if
(
fwrite
(
dbuf
,
strlen
(
dbuf
),
1
,
fp
)
==
0
)
return
0
;
return
1
;
}
/* Write a long value in bulk format $<count>\r\n<payload>\r\n */
int
fwriteBulkLongLong
(
FILE
*
fp
,
long
long
l
)
{
char
bbuf
[
128
],
lbuf
[
128
];
unsigned
int
blen
,
llen
;
llen
=
ll2string
(
lbuf
,
32
,
l
);
blen
=
snprintf
(
bbuf
,
sizeof
(
bbuf
),
"$%u
\r\n
%s
\r\n
"
,
llen
,
lbuf
);
if
(
fwrite
(
bbuf
,
blen
,
1
,
fp
)
==
0
)
return
0
;
return
1
;
}
/* Delegate writing an object to writing a bulk string or bulk long long. */
int
fwriteBulkObject
(
FILE
*
fp
,
robj
*
obj
)
{
/* Avoid using getDecodedObject to help copy-on-write (we are often
* in a child process when this function is called). */
if
(
obj
->
encoding
==
REDIS_ENCODING_INT
)
{
return
fwriteBulkLongLong
(
fp
,(
long
)
obj
->
ptr
);
}
else
if
(
obj
->
encoding
==
REDIS_ENCODING_RAW
)
{
return
fwriteBulkString
(
fp
,
obj
->
ptr
,
sdslen
(
obj
->
ptr
));
}
else
{
redisPanic
(
"Unknown string encoding"
);
}
}
/* Write a sequence of commands able to fully rebuild the dataset into
/* Write a sequence of commands able to fully rebuild the dataset into
* "filename". Used both by REWRITEAOF and BGREWRITEAOF. */
* "filename". Used both by REWRITEAOF and BGREWRITEAOF. */
int
rewriteAppendOnlyFile
(
char
*
filename
)
{
int
rewriteAppendOnlyFile
(
char
*
filename
)
{
...
...
src/redis.h
View file @
d08fac3e
...
@@ -697,6 +697,9 @@ unsigned long estimateObjectIdleTime(robj *o);
...
@@ -697,6 +697,9 @@ unsigned long estimateObjectIdleTime(robj *o);
int
syncWrite
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
);
int
syncWrite
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
);
int
syncRead
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
);
int
syncRead
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
);
int
syncReadLine
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
);
int
syncReadLine
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
);
int
fwriteBulkString
(
FILE
*
fp
,
char
*
s
,
unsigned
long
len
);
int
fwriteBulkDouble
(
FILE
*
fp
,
double
d
);
int
fwriteBulkLongLong
(
FILE
*
fp
,
long
long
l
);
/* Replication */
/* Replication */
void
replicationFeedSlaves
(
list
*
slaves
,
int
dictid
,
robj
**
argv
,
int
argc
);
void
replicationFeedSlaves
(
list
*
slaves
,
int
dictid
,
robj
**
argv
,
int
argc
);
...
...
src/syncio.c
View file @
d08fac3e
/* Synchronous socket I/O operations, with timeouts.
/* Synchronous socket and file I/O operations useful across the core.
* Redis performs most of the I/O in a nonblocking way, with the exception
* of the SYNC command where the slave does it in a blocking way, and
* the MIGRATE command that must be blocking in order to be atomic from the
* point of view of the two instances (one migrating the key and one receiving
* the key). This is why need the following blocking I/O functions.
*
*
* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
* All rights reserved.
* All rights reserved.
...
@@ -35,6 +30,14 @@
...
@@ -35,6 +30,14 @@
#include "redis.h"
#include "redis.h"
/* ----------------- Blocking sockets I/O with timeouts --------------------- */
/* Redis performs most of the I/O in a nonblocking way, with the exception
* of the SYNC command where the slave does it in a blocking way, and
* the MIGRATE command that must be blocking in order to be atomic from the
* point of view of the two instances (one migrating the key and one receiving
* the key). This is why need the following blocking I/O functions. */
int
syncWrite
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
)
{
int
syncWrite
(
int
fd
,
char
*
ptr
,
ssize_t
size
,
int
timeout
)
{
ssize_t
nwritten
,
ret
=
size
;
ssize_t
nwritten
,
ret
=
size
;
time_t
start
=
time
(
NULL
);
time_t
start
=
time
(
NULL
);
...
@@ -96,3 +99,56 @@ int syncReadLine(int fd, char *ptr, ssize_t size, int timeout) {
...
@@ -96,3 +99,56 @@ int syncReadLine(int fd, char *ptr, ssize_t size, int timeout) {
}
}
return
nread
;
return
nread
;
}
}
/* ----------------- Blocking sockets I/O with timeouts --------------------- */
/* Write binary-safe string into a file in the bulkformat
* $<count>\r\n<payload>\r\n */
int
fwriteBulkString
(
FILE
*
fp
,
char
*
s
,
unsigned
long
len
)
{
char
cbuf
[
128
];
int
clen
;
cbuf
[
0
]
=
'$'
;
clen
=
1
+
ll2string
(
cbuf
+
1
,
sizeof
(
cbuf
)
-
1
,
len
);
cbuf
[
clen
++
]
=
'\r'
;
cbuf
[
clen
++
]
=
'\n'
;
if
(
fwrite
(
cbuf
,
clen
,
1
,
fp
)
==
0
)
return
0
;
if
(
len
>
0
&&
fwrite
(
s
,
len
,
1
,
fp
)
==
0
)
return
0
;
if
(
fwrite
(
"
\r\n
"
,
2
,
1
,
fp
)
==
0
)
return
0
;
return
1
;
}
/* Write a double value in bulk format $<count>\r\n<payload>\r\n */
int
fwriteBulkDouble
(
FILE
*
fp
,
double
d
)
{
char
buf
[
128
],
dbuf
[
128
];
snprintf
(
dbuf
,
sizeof
(
dbuf
),
"%.17g
\r\n
"
,
d
);
snprintf
(
buf
,
sizeof
(
buf
),
"$%lu
\r\n
"
,(
unsigned
long
)
strlen
(
dbuf
)
-
2
);
if
(
fwrite
(
buf
,
strlen
(
buf
),
1
,
fp
)
==
0
)
return
0
;
if
(
fwrite
(
dbuf
,
strlen
(
dbuf
),
1
,
fp
)
==
0
)
return
0
;
return
1
;
}
/* Write a long value in bulk format $<count>\r\n<payload>\r\n */
int
fwriteBulkLongLong
(
FILE
*
fp
,
long
long
l
)
{
char
bbuf
[
128
],
lbuf
[
128
];
unsigned
int
blen
,
llen
;
llen
=
ll2string
(
lbuf
,
32
,
l
);
blen
=
snprintf
(
bbuf
,
sizeof
(
bbuf
),
"$%u
\r\n
%s
\r\n
"
,
llen
,
lbuf
);
if
(
fwrite
(
bbuf
,
blen
,
1
,
fp
)
==
0
)
return
0
;
return
1
;
}
/* Delegate writing an object to writing a bulk string or bulk long long. */
int
fwriteBulkObject
(
FILE
*
fp
,
robj
*
obj
)
{
/* Avoid using getDecodedObject to help copy-on-write (we are often
* in a child process when this function is called). */
if
(
obj
->
encoding
==
REDIS_ENCODING_INT
)
{
return
fwriteBulkLongLong
(
fp
,(
long
)
obj
->
ptr
);
}
else
if
(
obj
->
encoding
==
REDIS_ENCODING_RAW
)
{
return
fwriteBulkString
(
fp
,
obj
->
ptr
,
sdslen
(
obj
->
ptr
));
}
else
{
redisPanic
(
"Unknown string encoding"
);
}
}
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