/// <summary>
/// Explicitly reserve the ability to update a row, write lock, or to explicitly prevent a row from
/// being updated by any other session, read lock. Normally, row write locks are acquired implicitly as a
/// result of updating rows. Read locks are usually not required because of record versioning. However,
/// in some cases a transaction may desire to explicitly lock a row to enforce serialization, or to ensure
/// that a subsequent operation will succeed.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">The cursor to use. A lock will be acquired on the current record.</param>
/// <param name="grbit">Lock options, use this to specify which type of lock to obtain.</param>
/// <returns>
/// True if the lock was obtained, false otherwise. An exception is thrown if an unexpected
/// error is encountered.
/// </returns>
public static bool TryGetLock(JET_SESID sesid, JET_TABLEID tableid, GetLockGrbit grbit)
{
var err = (JET_err)Impl.JetGetLock(sesid, tableid, grbit);
if (JET_err.WriteConflict == err)
{
return false;
}
Api.Check((int)err);
Debug.Assert(err >= JET_err.Success, "Exception should have been thrown in case of error");
return true;
}
/// <summary>
/// Explicitly reserve the ability to update a row, write lock, or to explicitly prevent a row from
/// being updated by any other session, read lock. Normally, row write locks are acquired implicitly as a
/// result of updating rows. Read locks are usually not required because of record versioning. However,
/// in some cases a transaction may desire to explicitly lock a row to enforce serialization, or to ensure
/// that a subsequent operation will succeed.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">The cursor to use. A lock will be acquired on the current record.</param>
/// <param name="grbit">Lock options, use this to specify which type of lock to obtain.</param>
/// <returns>
/// True if the lock was obtained, false otherwise. An exception is thrown if an unexpected
/// error is encountered.
/// </returns>
public static bool TryGetLock(JET_SESID sesid, JET_TABLEID tableid, GetLockGrbit grbit)
{
var err = (JET_err)Impl.JetGetLock(sesid, tableid, grbit);
if (JET_err.WriteConflict == err)
{
return(false);
}
Api.Check((int)err);
Debug.Assert(err >= JET_err.Success, "Exception should have been thrown in case of error");
return(true);
}
/// <summary>
/// Explicitly reserve the ability to update a row, write lock, or to explicitly prevent a row from
/// being updated by any other session, read lock. Normally, row write locks are acquired implicitly as a
/// result of updating rows. Read locks are usually not required because of record versioning. However,
/// in some cases a transaction may desire to explicitly lock a row to enforce serialization, or to ensure
/// that a subsequent operation will succeed.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">The cursor to use. A lock will be acquired on the current record.</param>
/// <param name="grbit">Lock options, use this to specify which type of lock to obtain.</param>
public static void JetGetLock(JET_SESID sesid, JET_TABLEID tableid, GetLockGrbit grbit)
{
Api.Check(Impl.JetGetLock(sesid, tableid, grbit));
}
