Golang C.sqlite3_get_autocommit类(方法)实例源码

// AutoCommit return which currently auto commit or not.
func (c *SQLiteConn) AutoCommit() bool {
	return int(C.sqlite3_get_autocommit(c.db)) != 0
}

//export traceCallbackTrampoline
func traceCallbackTrampoline(
	traceEventCode uint,
	// Parameter named 'C' in SQLite docs = Context given at registration:
	ctx unsafe.Pointer,
	// Parameter named 'P' in SQLite docs (Primary event data?):
	p unsafe.Pointer,
	// Parameter named 'X' in SQLite docs (eXtra event data?):
	xValue unsafe.Pointer) int {

	if ctx == nil {
		panic(fmt.Sprintf("No context (ev 0x%x)", traceEventCode))
	}

	contextDB := (*C.sqlite3)(ctx)
	connHandle := uintptr(ctx)

	var traceConf TraceConfig
	var found bool
	if traceEventCode == TraceClose {
		// clean up traceMap: 'pop' means get and delete
		traceConf, found = popTraceMapping(connHandle)
	} else {
		traceConf, found = lookupTraceMapping(connHandle)
	}

	if !found {
		panic(fmt.Sprintf("Mapping not found for handle 0x%x (ev 0x%x)",
			connHandle, traceEventCode))
	}

	var info TraceInfo

	info.EventCode = uint32(traceEventCode)
	info.AutoCommit = (int(C.sqlite3_get_autocommit(contextDB)) != 0)
	info.ConnHandle = connHandle

	switch traceEventCode {
	case TraceStmt:
		info.StmtHandle = uintptr(p)

		var xStr string
		if xValue != nil {
			xStr = C.GoString((*C.char)(xValue))
		}
		info.StmtOrTrigger = xStr
		if !strings.HasPrefix(xStr, "--") {
			// Not SQL comment, therefore the current event
			// is not related to a trigger.
			// The user might want to receive the expanded SQL;
			// let's check:
			if traceConf.WantExpandedSQL {
				fillExpandedSQL(&info, contextDB, p)
			}
		}

	case TraceProfile:
		info.StmtHandle = uintptr(p)

		if xValue == nil {
			panic("NULL pointer in X arg of trace_v2 callback for SQLITE_TRACE_PROFILE event")
		}

		info.RunTimeNanosec = *(*int64)(xValue)

		// sample the error //TODO: is it safe? is it useful?
		fillDBError(&info.DBError, contextDB)

	case TraceRow:
		info.StmtHandle = uintptr(p)

	case TraceClose:
		handle := uintptr(p)
		if handle != info.ConnHandle {
			panic(fmt.Sprintf("Different conn handle 0x%x (expected 0x%x) in SQLITE_TRACE_CLOSE event.",
				handle, info.ConnHandle))
		}

	default:
		// Pass unsupported events to the user callback (if configured);
		// let the user callback decide whether to panic or ignore them.
	}

	// Do not execute user callback when the event was not requested by user!
	// Remember that the Close event is always selected when
	// registering this callback trampoline with SQLite --- for cleanup.
	// In the future there may be more events forced to "selected" in SQLite
	// for the driver's needs.
	if traceConf.EventMask&traceEventCode == 0 {
		return 0
	}

	r := 0
	if traceConf.Callback != nil {
		r = traceConf.Callback(info)
	}
	return r
}

// GetAutocommit tests for auto-commit mode.
// (See http://sqlite.org/c3ref/get_autocommit.html)
func (c *Conn) GetAutocommit() bool {
	return C.sqlite3_get_autocommit(c.db) != 0
}

// AutoCommit returns true if the database connection is in auto-commit mode
// (i.e. outside of an explicit transaction started by BEGIN).
// [http://www.sqlite.org/c3ref/get_autocommit.html]
func (c *Conn) AutoCommit() bool {
	if c.db == nil {
		return false
	}
	return C.sqlite3_get_autocommit(c.db) != 0
}