X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=index%2Flockutil.c;h=d59067f003780c5594b7beaad2d83305a05f24bd;hb=adc0ef50c52d332902ef92c8feb460eee55a1f05;hp=acd65410aa3f86a6b4acad9fb56883b2be59e265;hpb=4e2fc80e64f3d7895a871ea5b08aa80045a59f2c;p=idzebra-moved-to-github.git

diff --git a/index/lockutil.c b/index/lockutil.c
index acd6541..d59067f 100644
--- a/index/lockutil.c
+++ b/index/lockutil.c
@@ -4,17 +4,33 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: lockutil.c,v $
- * Revision 1.1  1995-12-07 17:38:47  adam
+ * Revision 1.5  1996-03-26 16:01:13  adam
+ * New setting lockPath: directory of various lock files.
+ *
+ * Revision 1.4  1995/12/13  08:46:10  adam
+ * Locking uses F_WRLCK and F_RDLCK again!
+ *
+ * Revision 1.3  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 1.2  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 1.1  1995/12/07  17:38:47  adam
  * Work locking mechanisms for concurrent updates/commit.
  *
  */
 #include <stdio.h>
 #include <assert.h>
-#include <unistd.h>
-#include <sys/file.h>
-#include <fcntl.h>
 #include <string.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 #include <alexutil.h>
 #include "index.h"
@@ -24,10 +40,42 @@ static char *lockDir = NULL;
 void zebraLockPrefix (char *pathPrefix)
 {
     if (!lockDir)
-        lockDir = res_get_def (common_resource, "lockDir", "");
+        lockDir = res_get_def (common_resource, "lockPath", "");
     assert (lockDir);
     
     strcpy (pathPrefix, lockDir);
     if (*pathPrefix && pathPrefix[strlen(pathPrefix)-1] != '/')
         strcat (pathPrefix, "/");
 }
+
+static int intLock (int fd, int type, int cmd)
+{
+    struct flock area;
+    area.l_type = type;
+    area.l_whence = SEEK_SET;
+    area.l_len = area.l_start = 0L;
+    return fcntl (fd, cmd, &area);
+}
+
+int zebraLock (int fd, int wr)
+{
+#if 0
+    return intLock (fd, wr ? F_EXLCK : F_SHLCK, F_SETLKW);
+#else
+    return intLock (fd, wr ? F_WRLCK : F_RDLCK, F_SETLKW);
+#endif
+}
+
+int zebraLockNB (int fd, int wr)
+{
+#if 0
+    return intLock (fd, wr ? F_EXLCK : F_SHLCK, F_SETLK);
+#else
+    return intLock (fd, wr ? F_WRLCK : F_RDLCK, F_SETLK);
+#endif
+}
+
+int zebraUnlock (int fd)
+{
+    return intLock (fd, F_UNLCK, F_SETLKW);
+}