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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 = APR_SUCCESS;
int do_locking = file->mutex != NULL && file->buffered;
if (do_locking) {
apr_thread_mutex_lock(file->mutex);
}
if (file->buffered) {
/* Flush the existing buffer */
rv = apr_file_flush(file);
if (rv != APR_SUCCESS) {
if (do_locking) {
apr_thread_mutex_unlock(file->mutex);
}
return rv;
}
}
file->buffer = buffer;
file->bufsize = bufsize;
file->bufpos = 0;
file->direction = 0;
file->dataRead = 0;
if (bufsize > 0 && file->mutex == NULL && (file->flags & APR_FOPEN_XTHREAD)) {
/* buffering is being turned on but we have no mutex, make one */
rv = apr_thread_mutex_create(&file->mutex, 0, file->pool);
}
/* Setting the buffer size to zero is equivalent to turning
* buffering off.
*/
file->buffered = file->bufsize > 0;
if (do_locking) {
apr_thread_mutex_unlock(file->mutex);
}
return rv;
}
APR_DECLARE(apr_size_t) apr_file_buffer_size_get(apr_file_t *file)
{
return file->bufsize;
}
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