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-rw-r--r--file_io/win32/buffer.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/file_io/win32/buffer.c b/file_io/win32/buffer.c
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+++ b/file_io/win32/buffer.c
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_arch_file_io.h"
+#include "apr_thread_mutex.h"
+
+APR_DECLARE(apr_status_t) apr_file_buffer_set(apr_file_t *file,
+ char * buffer,
+ apr_size_t bufsize)
+{
+ apr_status_t rv;
+
+ if (file->flags & APR_FOPEN_XTHREAD) {
+ apr_thread_mutex_lock(file->mutex);
+ }
+
+ if(file->buffered) {
+ /* Flush the existing buffer */
+ rv = apr_file_flush(file);
+ if (rv != APR_SUCCESS) {
+ if (file->flags & APR_FOPEN_XTHREAD) {
+ apr_thread_mutex_unlock(file->mutex);
+ }
+ return rv;
+ }
+ }
+
+ file->buffer = buffer;
+ file->bufsize = bufsize;
+ file->buffered = 1;
+ file->bufpos = 0;
+ file->direction = 0;
+ file->dataRead = 0;
+
+ if (file->bufsize == 0) {
+ /* Setting the buffer size to zero is equivalent to turning
+ * buffering off.
+ */
+ file->buffered = 0;
+ }
+
+ if (file->flags & APR_FOPEN_XTHREAD) {
+ apr_thread_mutex_unlock(file->mutex);
+ }
+
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_size_t) apr_file_buffer_size_get(apr_file_t *file)
+{
+ return file->bufsize;
+}