1 /* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "apr_arch_file_io.h" 18 #include "apr_thread_mutex.h" 19 apr_file_buffer_set(apr_file_t * file,char * buffer,apr_size_t bufsize)20APR_DECLARE(apr_status_t) apr_file_buffer_set(apr_file_t *file, 21 char * buffer, 22 apr_size_t bufsize) 23 { 24 apr_status_t rv; 25 26 apr_thread_mutex_lock(file->mutex); 27 28 if(file->buffered) { 29 /* Flush the existing buffer */ 30 rv = apr_file_flush(file); 31 if (rv != APR_SUCCESS) { 32 apr_thread_mutex_unlock(file->mutex); 33 return rv; 34 } 35 } 36 37 file->buffer = buffer; 38 file->bufsize = bufsize; 39 file->buffered = 1; 40 file->bufpos = 0; 41 file->direction = 0; 42 file->dataRead = 0; 43 44 if (file->bufsize == 0) { 45 /* Setting the buffer size to zero is equivalent to turning 46 * buffering off. 47 */ 48 file->buffered = 0; 49 } 50 51 apr_thread_mutex_unlock(file->mutex); 52 53 return APR_SUCCESS; 54 } 55 apr_file_buffer_size_get(apr_file_t * file)56APR_DECLARE(apr_size_t) apr_file_buffer_size_get(apr_file_t *file) 57 { 58 return file->bufsize; 59 } 60