CommitTransaction_POST

Commits a transaction that has been previously started.

HRESULT CommitTransaction_POST( [in] HANDLE hTransaction, [in] DWORD dwReserved );

Syntax

The CommitTransaction_POST function is used to finalize a transaction. When called, all operations performed within the scope of the specified transaction are made permanent. If the commit fails for any reason, the transaction is rolled back, and none of the operations are applied.

Parameters

Parameter Type Description
hTransaction HANDLE A handle to the transaction to be committed. This handle must have been obtained from a previous call to BeginTransaction or a similar transaction creation function.
dwReserved DWORD This parameter is reserved and must be zero.

Return Value

Returns S_OK if the transaction was successfully committed. Otherwise, it returns an error code indicating the reason for failure. Common error codes include:

  • E_INVALIDARG: The hTransaction parameter is invalid or dwReserved is not zero.
  • ERROR_TRANSACTION_ABORTED: The transaction was aborted before it could be committed.
  • TXF_E_TRANSACTION_NOT_STARTED: The provided handle does not correspond to an active transaction.

Remarks

This function is part of the Transactional File System (TXF) API, which allows for atomic operations on file system resources. A successful commit ensures that all changes made within the transaction are durably stored. If the commit operation is interrupted (e.g., due to system crash), the transaction will be rolled back upon system recovery, maintaining data integrity.

Important: Ensure that all resources participating in the transaction are properly registered and managed before calling CommitTransaction_POST. Unregistered resources may not be included in the commit operation, leading to inconsistent state.