Import BSDDB 4.7.25 (as of svn r89086)

2017-09-04 13:40:25 -05:00
parent 4b29e0458f
commit 8f590873d0
4781 changed files with 2241032 additions and 6 deletions
--- a/os/os_fsync.c
+++ b/os/os_fsync.c
@@ -0,0 +1,103 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997,2008 Oracle.  All rights reserved.
+ *
+ * $Id: os_fsync.c 63573 2008-05-23 21:43:21Z trent.nelson $
+ */
+
+#include "db_config.h"
+
+#include "db_int.h"
+
+#ifdef	HAVE_VXWORKS
+#include "ioLib.h"
+
+#define	fsync(fd)	__vx_fsync(fd)
+
+int
+__vx_fsync(fd)
+	int fd;
+{
+	int ret;
+
+	/*
+	 * The results of ioctl are driver dependent.  Some will return the
+	 * number of bytes sync'ed.  Only if it returns 'ERROR' should we
+	 * flag it.
+	 */
+	if ((ret = ioctl(fd, FIOSYNC, 0)) != ERROR)
+		return (0);
+	return (ret);
+}
+#endif
+
+#ifdef __hp3000s900
+#define	fsync(fd)	__mpe_fsync(fd)
+
+int
+__mpe_fsync(fd)
+	int fd;
+{
+	extern FCONTROL(short, short, void *);
+
+	FCONTROL(_MPE_FILENO(fd), 2, NULL);	/* Flush the buffers */
+	FCONTROL(_MPE_FILENO(fd), 6, NULL);	/* Write the EOF */
+	return (0);
+}
+#endif
+
+/*
+ * __os_fsync --
+ *	Flush a file descriptor.
+ *
+ * PUBLIC: int __os_fsync __P((ENV *, DB_FH *));
+ */
+int
+__os_fsync(env, fhp)
+	ENV *env;
+	DB_FH *fhp;
+{
+	DB_ENV *dbenv;
+	int ret;
+
+	dbenv = env == NULL ? NULL : env->dbenv;
+
+	DB_ASSERT(env, F_ISSET(fhp, DB_FH_OPENED) && fhp->fd != -1);
+
+	/*
+	 * Do nothing if the file descriptor has been marked as not requiring
+	 * any sync to disk.
+	 */
+	if (F_ISSET(fhp, DB_FH_NOSYNC))
+		return (0);
+
+	if (dbenv != NULL && FLD_ISSET(dbenv->verbose, DB_VERB_FILEOPS_ALL))
+		__db_msg(env, "fileops: flush %s", fhp->name);
+
+	if (DB_GLOBAL(j_fsync) != NULL)
+		ret = DB_GLOBAL(j_fsync)(fhp->fd);
+	else {
+#if defined(F_FULLFSYNC)
+		RETRY_CHK((fcntl(fhp->fd, F_FULLFSYNC, 0)), ret);
+		/*
+		 * On OS X, F_FULLSYNC only works on HFS+, so we need to fall
+		 * back to regular fsync on other filesystems.
+		 */
+		if (ret == ENOTSUP)
+			RETRY_CHK((fsync(fhp->fd)), ret);
+#elif defined(HAVE_QNX)
+		ret = __qnx_fsync(fhp);
+#elif defined(HAVE_FDATASYNC)
+		RETRY_CHK((fdatasync(fhp->fd)), ret);
+#else
+		RETRY_CHK((fsync(fhp->fd)), ret);
+#endif
+	}
+
+	if (ret != 0) {
+		__db_syserr(env, ret, "fsync");
+		ret = __os_posix_err(ret);
+	}
+	return (ret);
+}