/*
- * Copyright (C) 1994-1995, Index Data I/S
+ * Copyright (C) 1994-1999, Index Data
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: lockidx.c,v $
- * Revision 1.1 1995-12-07 17:38:47 adam
+ * Revision 1.16 1999-02-02 14:50:57 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.15 1998/02/17 10:31:33 adam
+ * Fixed bug in zebraIndexUnlock. On NT, the lock files wasn't removed.
+ *
+ * Revision 1.14 1998/01/12 15:04:08 adam
+ * The test option (-s) only uses read-lock (and not write lock).
+ *
+ * Revision 1.13 1997/09/29 09:08:36 adam
+ * Revised locking system to be thread safe for the server.
+ *
+ * Revision 1.12 1997/09/25 14:54:43 adam
+ * WIN32 files lock support.
+ *
+ * Revision 1.11 1997/09/17 12:19:15 adam
+ * Zebra version corresponds to YAZ version 1.4.
+ * Changed Zebra server so that it doesn't depend on global common_resource.
+ *
+ * Revision 1.10 1997/09/09 13:38:07 adam
+ * Partial port to WIN95/NT.
+ *
+ * Revision 1.9 1997/09/04 13:58:04 adam
+ * Added O_BINARY for open calls.
+ *
+ * Revision 1.8 1997/02/12 20:39:46 adam
+ * Implemented options -f <n> that limits the log to the first <n>
+ * records.
+ * Changed some log messages also.
+ *
+ * Revision 1.7 1996/10/29 14:08:13 adam
+ * Uses resource lockDir instead of lockPath.
+ *
+ * Revision 1.6 1996/03/26 16:01:13 adam
+ * New setting lockPath: directory of various lock files.
+ *
+ * Revision 1.5 1995/12/13 08:46:09 adam
+ * Locking uses F_WRLCK and F_RDLCK again!
+ *
+ * Revision 1.4 1995/12/12 16:00:57 adam
+ * System call sync(2) used after update/commit.
+ * Locking (based on fcntl) uses F_EXLCK and F_SHLCK instead of F_WRLCK
+ * and F_RDLCK.
+ *
+ * Revision 1.3 1995/12/11 11:43:29 adam
+ * Locking based on fcntl instead of flock.
+ * Setting commitEnable removed. Command line option -n can be used to
+ * prevent commit if commit setting is defined in the configuration file.
+ *
+ * Revision 1.2 1995/12/08 16:22:54 adam
+ * Work on update while servers are running. Three lock files introduced.
+ * The servers reload their registers when necessary, but they don't
+ * reestablish result sets yet.
+ *
+ * Revision 1.1 1995/12/07 17:38:47 adam
* Work locking mechanisms for concurrent updates/commit.
*
*/
#include <stdio.h>
#include <assert.h>
+#ifdef WIN32
+#include <io.h>
+#else
#include <unistd.h>
-#include <sys/file.h>
+#endif
#include <fcntl.h>
#include <string.h>
#include <errno.h>
-#include <alexutil.h>
#include "index.h"
-static int lock_fd = -1;
+static ZebraLockHandle server_lock_main = NULL;
+static ZebraLockHandle server_lock_cmt = NULL;
+static ZebraLockHandle server_lock_org = NULL;
+
+int zebraIndexWait (int commitPhase)
+{
+ ZebraLockHandle h;
+
+ if (server_lock_cmt)
+ zebra_unlock (server_lock_cmt);
+ else
+ {
+ char path[1024];
+
+ zebra_lock_prefix (common_resource, path);
+ strcat (path, FNAME_COMMIT_LOCK);
+ server_lock_cmt = zebra_lock_create (path, 1);
+ if (!server_lock_cmt)
+ {
+ logf (LOG_WARN|LOG_ERRNO, "cannot create lock %s", path);
+ return -1;
+ }
+ }
+ if (server_lock_org)
+ zebra_unlock (server_lock_org);
+ else
+ {
+ char path[1024];
+
+ zebra_lock_prefix (common_resource, path);
+ strcat (path, FNAME_ORG_LOCK);
+ server_lock_org = zebra_lock_create (path, 1);
+ if (!server_lock_org)
+ {
+ logf (LOG_WARN|LOG_ERRNO, "cannot create lock %s", path);
+ return -1;
+ }
+ }
+ if (commitPhase)
+ h = server_lock_cmt;
+ else
+ h = server_lock_org;
+ if (zebra_lock_nb (h))
+ {
+#ifndef WIN32
+ if (errno != EWOULDBLOCK)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "flock");
+ exit (1);
+ }
+#endif
+ if (commitPhase)
+ logf (LOG_LOG, "Waiting for lock cmt");
+ else
+ logf (LOG_LOG, "Waiting for lock org");
+ if (zebra_lock (h) == -1)
+ {
+ logf (LOG_FATAL, "flock");
+ exit (1);
+ }
+ }
+ zebra_unlock (h);
+ return 0;
+}
+
void zebraIndexLockMsg (const char *str)
{
- int l, r;
+ char path[1024];
+ int l, r, fd;
- assert (lock_fd != -1);
- lseek (lock_fd, 0L, SEEK_SET);
+ assert (server_lock_main);
+ fd = zebra_lock_fd (server_lock_main);
+ lseek (fd, 0L, SEEK_SET);
l = strlen(str);
- r = write (lock_fd, str, l);
+ r = write (fd, str, l);
if (r != l)
{
logf (LOG_FATAL|LOG_ERRNO, "write lock file");
exit (1);
}
+ zebra_lock_prefix (common_resource, path);
+ strcat (path, FNAME_TOUCH_TIME);
+ fd = creat (path, 0666);
+ close (fd);
}
-void zebraIndexUnlock (int rw)
+void zebraIndexUnlock (void)
{
char path[1024];
- char pathPrefix[1024];
-
- if (lock_fd == -1)
- return;
-
- zebraLockPrefix (pathPrefix);
- sprintf (path, "%s%s", pathPrefix, FNAME_MAIN_LOCK);
- unlink (path);
+
+ zebra_lock_destroy (server_lock_main);
+ zebra_lock_prefix (common_resource, path);
+ strcat (path, FNAME_MAIN_LOCK);
+ if (unlink (path))
+ logf (LOG_WARN|LOG_ERRNO, "unlink %s", path);
}
-void zebraIndexLock (int rw)
+void zebraIndexLock (BFiles bfs, int commitNow, const char *rval)
{
char path[1024];
- char pathPrefix[1024];
char buf[256];
int r;
- zebraLockPrefix (pathPrefix);
- sprintf (path, "%s%s", pathPrefix, FNAME_MAIN_LOCK);
- if (rw)
+ if (server_lock_main)
+ return ;
+
+ zebra_lock_prefix (common_resource, path);
+ strcat (path, FNAME_MAIN_LOCK);
+ while (1)
{
- while (1)
+ server_lock_main = zebra_lock_create (path, 2);
+ if (!server_lock_main)
{
- lock_fd = open (path, O_CREAT|O_RDWR|O_EXCL|O_SYNC, 0666);
- if (lock_fd == -1)
+ server_lock_main = zebra_lock_create (path, 1);
+ if (!server_lock_main)
+ {
+ if (errno == ENOENT)
+ continue;
+ logf (LOG_FATAL|LOG_ERRNO, "open %s", path);
+ exit (1);
+ }
+ if (zebra_lock_nb (server_lock_main) == -1)
{
- lock_fd = open (path, O_RDONLY);
- assert (lock_fd != -1);
- if (flock (lock_fd, LOCK_EX|LOCK_NB) == -1)
+#ifdef WIN32
+ logf (LOG_LOG, "waiting for other index process");
+ zebra_lock (server_lock_main);
+ zebra_unlock (server_lock_main);
+ zebra_lock_destroy (server_lock_main);
+ continue;
+#else
+ if (errno == EWOULDBLOCK)
{
- if (errno == EWOULDBLOCK)
- {
- logf (LOG_LOG, "Waiting for other index process");
- flock (lock_fd, LOCK_EX);
- continue;
- }
- else
- {
- logf (LOG_FATAL|LOG_ERRNO, "flock %s", path);
- exit (1);
- }
+ logf (LOG_LOG, "waiting for other index process");
+ zebra_lock (server_lock_main);
+ zebra_unlock (server_lock_main);
+ zebra_lock_destroy (server_lock_main);
+ continue;
}
else
{
- logf (LOG_WARN, "Unlocked %s", path);
- r = read (lock_fd, buf, 256);
- if (r == 0)
- {
- logf (LOG_WARN, "Zero length %s", path);
- unlink (path);
- close (lock_fd);
- continue;
- }
- else if (r == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "read %s", path);
- exit (1);
- }
- if (*buf == 'r')
+ logf (LOG_FATAL|LOG_ERRNO, "flock %s", path);
+ exit (1);
+ }
+#endif
+ }
+ else
+ {
+ int fd = zebra_lock_fd (server_lock_main);
+
+ logf (LOG_WARN, "unlocked %s", path);
+ r = read (fd, buf, 256);
+ if (r == 0)
+ {
+ logf (LOG_WARN, "zero length %s", path);
+ zebra_lock_destroy (server_lock_main);
+ unlink (path);
+ continue;
+ }
+ else if (r == -1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "read %s", path);
+ exit (1);
+ }
+ if (*buf == 'r')
+ {
+ logf (LOG_WARN, "previous transaction didn't"
+ " reach commit");
+ zebra_lock_destroy (server_lock_main);
+ bf_commitClean (bfs, rval);
+ unlink (path);
+ continue;
+ }
+ else if (*buf == 'd')
+ {
+ logf (LOG_WARN, "commit file wan't deleted after commit");
+ zebra_lock_destroy (server_lock_main);
+ bf_commitClean (bfs, rval);
+ unlink (path);
+ continue;
+ }
+ else if (*buf == 'w')
+ {
+ logf (LOG_WARN,
+ "The lock file indicates that your index is");
+ logf (LOG_WARN, "inconsistent. Perhaps the indexer");
+ logf (LOG_WARN, "terminated abnormally in the previous");
+ logf (LOG_WARN, "run. You can try to proceed by");
+ logf (LOG_WARN, "deleting the file %s", path);
+ exit (1);
+ }
+ else if (*buf == 'c')
+ {
+ if (commitNow)
{
- logf (LOG_WARN, "Previous transaction didn't"
- " reach commit");
unlink (path);
- close (lock_fd);
+ zebra_lock_destroy (server_lock_main);
continue;
}
- else if (*buf == 'w')
- {
- logf (LOG_WARN, "Your index may be inconsistent");
- exit (1);
- }
- else if (*buf == 'c')
- {
- logf (LOG_FATAL, "Previous transaction didn't"
- " finish commit. Restore now!");
- exit (1);
- }
- else
- {
- logf (LOG_FATAL, "Unknown id 0x%02x in %s", *buf,
- path);
- exit (1);
- }
+ logf (LOG_FATAL, "previous transaction didn't"
+ " finish commit. Commit now!");
+ exit (1);
+ }
+ else
+ {
+ logf (LOG_FATAL, "unknown id 0x%02x in %s", *buf,
+ path);
+ exit (1);
}
}
- else
- break;
}
- flock (lock_fd, LOCK_EX);
+ else
+ break;
}
-}
-
-void zebraIndexLockCommit (void)
-{
-
+ zebra_lock (server_lock_main);
}
projects / idzebra-moved-to-github.git / blobdiff