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https://github.com/fluencelabs/redis
synced 2025-03-17 16:10:50 +00:00
synchronous I/O networking functions originally used just for replication refactored in a file as generally useful, they are used in the cluster branch for MIGRATE.
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d94ac406ba
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@ -24,7 +24,7 @@ PREFIX= /usr/local
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INSTALL_BIN= $(PREFIX)/bin
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INSTALL= cp -p
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OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o lzf_c.o lzf_d.o pqsort.o zipmap.o sha1.o ziplist.o release.o networking.o util.o object.o db.o replication.o rdb.o t_string.o t_list.o t_set.o t_zset.o t_hash.o config.o aof.o vm.o pubsub.o multi.o debug.o sort.o intset.o
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OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o lzf_c.o lzf_d.o pqsort.o zipmap.o sha1.o ziplist.o release.o networking.o util.o object.o db.o replication.o rdb.o t_string.o t_list.o t_set.o t_zset.o t_hash.o config.o aof.o vm.o pubsub.o multi.o debug.o sort.o intset.o syncio.o
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BENCHOBJ = ae.o anet.o redis-benchmark.o sds.o adlist.o zmalloc.o
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CLIOBJ = anet.o sds.o adlist.o redis-cli.o zmalloc.o linenoise.o
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CHECKDUMPOBJ = redis-check-dump.o lzf_c.o lzf_d.o
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@ -38,7 +38,6 @@ CHECKAOFPRGNAME = redis-check-aof
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all: redis-server redis-benchmark redis-cli redis-check-dump redis-check-aof
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# Deps (use make dep to generate this)
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adlist.o: adlist.c adlist.h zmalloc.h
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ae.o: ae.c ae.h zmalloc.h config.h ae_kqueue.c
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@ -48,6 +47,7 @@ ae_select.o: ae_select.c
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anet.o: anet.c fmacros.h anet.h
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aof.o: aof.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
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zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h
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chprgname.o: chprgname.c
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config.o: config.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
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zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h
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db.o: db.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
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@ -85,6 +85,7 @@ sds.o: sds.c sds.h zmalloc.h
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sha1.o: sha1.c sha1.h
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sort.o: sort.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
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zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h pqsort.h
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syncio.o: syncio.c
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t_hash.o: t_hash.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
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zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h
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t_list.o: t_list.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
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@ -693,6 +693,11 @@ int compareStringObjects(robj *a, robj *b);
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int equalStringObjects(robj *a, robj *b);
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unsigned long estimateObjectIdleTime(robj *o);
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/* Synchronous I/O with timeout */
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int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
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int syncRead(int fd, char *ptr, ssize_t size, int timeout);
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int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
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/* Replication */
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void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
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void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
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@ -110,68 +110,6 @@ void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc)
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decrRefCount(cmdobj);
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}
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int syncWrite(int fd, char *ptr, ssize_t size, int timeout) {
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ssize_t nwritten, ret = size;
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time_t start = time(NULL);
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timeout++;
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while(size) {
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if (aeWait(fd,AE_WRITABLE,1000) & AE_WRITABLE) {
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nwritten = write(fd,ptr,size);
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if (nwritten == -1) return -1;
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ptr += nwritten;
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size -= nwritten;
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}
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if ((time(NULL)-start) > timeout) {
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errno = ETIMEDOUT;
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return -1;
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}
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}
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return ret;
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}
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int syncRead(int fd, char *ptr, ssize_t size, int timeout) {
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ssize_t nread, totread = 0;
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time_t start = time(NULL);
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timeout++;
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while(size) {
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if (aeWait(fd,AE_READABLE,1000) & AE_READABLE) {
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nread = read(fd,ptr,size);
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if (nread <= 0) return -1;
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ptr += nread;
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size -= nread;
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totread += nread;
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}
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if ((time(NULL)-start) > timeout) {
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errno = ETIMEDOUT;
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return -1;
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}
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}
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return totread;
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}
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int syncReadLine(int fd, char *ptr, ssize_t size, int timeout) {
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ssize_t nread = 0;
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size--;
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while(size) {
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char c;
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if (syncRead(fd,&c,1,timeout) == -1) return -1;
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if (c == '\n') {
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*ptr = '\0';
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if (nread && *(ptr-1) == '\r') *(ptr-1) = '\0';
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return nread;
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} else {
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*ptr++ = c;
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*ptr = '\0';
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nread++;
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}
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}
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return nread;
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}
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void syncCommand(redisClient *c) {
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/* ignore SYNC if aleady slave or in monitor mode */
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if (c->flags & REDIS_SLAVE) return;
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98
src/syncio.c
Normal file
98
src/syncio.c
Normal file
@ -0,0 +1,98 @@
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/* Synchronous socket I/O operations, with timeouts.
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* Redis performs most of the I/O in a nonblocking way, with the exception
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* of the SYNC command where the slave does it in a blocking way, and
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* the MIGRATE command that must be blocking in order to be atomic from the
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* point of view of the two instances (one migrating the key and one receiving
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* the key). This is why need the following blocking I/O functions.
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*
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* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "redis.h"
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int syncWrite(int fd, char *ptr, ssize_t size, int timeout) {
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ssize_t nwritten, ret = size;
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time_t start = time(NULL);
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timeout++;
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while(size) {
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if (aeWait(fd,AE_WRITABLE,1000) & AE_WRITABLE) {
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nwritten = write(fd,ptr,size);
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if (nwritten == -1) return -1;
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ptr += nwritten;
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size -= nwritten;
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}
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if ((time(NULL)-start) > timeout) {
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errno = ETIMEDOUT;
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return -1;
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}
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}
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return ret;
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}
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int syncRead(int fd, char *ptr, ssize_t size, int timeout) {
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ssize_t nread, totread = 0;
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time_t start = time(NULL);
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timeout++;
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while(size) {
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if (aeWait(fd,AE_READABLE,1000) & AE_READABLE) {
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nread = read(fd,ptr,size);
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if (nread <= 0) return -1;
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ptr += nread;
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size -= nread;
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totread += nread;
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}
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if ((time(NULL)-start) > timeout) {
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errno = ETIMEDOUT;
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return -1;
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}
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}
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return totread;
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}
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int syncReadLine(int fd, char *ptr, ssize_t size, int timeout) {
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ssize_t nread = 0;
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size--;
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while(size) {
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char c;
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if (syncRead(fd,&c,1,timeout) == -1) return -1;
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if (c == '\n') {
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*ptr = '\0';
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if (nread && *(ptr-1) == '\r') *(ptr-1) = '\0';
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return nread;
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} else {
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*ptr++ = c;
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*ptr = '\0';
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nread++;
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}
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}
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return nread;
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}
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