146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*/
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#include <apr_pools.h>
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#include <apr_mmap.h>
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#include "serf.h"
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#include "serf_bucket_util.h"
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#if APR_HAS_MMAP
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typedef struct {
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apr_mmap_t *mmap;
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void *current;
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apr_off_t offset;
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apr_off_t remaining;
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} mmap_context_t;
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serf_bucket_t *serf_bucket_mmap_create(
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apr_mmap_t *file_mmap,
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serf_bucket_alloc_t *allocator)
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{
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mmap_context_t *ctx;
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ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx));
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ctx->mmap = file_mmap;
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ctx->current = NULL;
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ctx->offset = 0;
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ctx->remaining = ctx->mmap->size;
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return serf_bucket_create(&serf_bucket_type_mmap, allocator, ctx);
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}
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static apr_status_t serf_mmap_read(serf_bucket_t *bucket,
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apr_size_t requested,
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const char **data, apr_size_t *len)
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{
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mmap_context_t *ctx = bucket->data;
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if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) {
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*len = ctx->remaining;
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}
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else {
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*len = requested;
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}
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/* ### Would it be faster to call this once and do the offset ourselves? */
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apr_mmap_offset((void**)data, ctx->mmap, ctx->offset);
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/* For the next read... */
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ctx->offset += *len;
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ctx->remaining -= *len;
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if (ctx->remaining == 0) {
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return APR_EOF;
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}
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return APR_SUCCESS;
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}
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static apr_status_t serf_mmap_readline(serf_bucket_t *bucket,
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int acceptable, int *found,
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const char **data, apr_size_t *len)
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{
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mmap_context_t *ctx = bucket->data;
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const char *end;
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/* ### Would it be faster to call this once and do the offset ourselves? */
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apr_mmap_offset((void**)data, ctx->mmap, ctx->offset);
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end = *data;
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/* XXX An overflow is generated if we pass &ctx->remaining to readline.
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* Not real clear why.
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*/
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*len = ctx->remaining;
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serf_util_readline(&end, len, acceptable, found);
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*len = end - *data;
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ctx->offset += *len;
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ctx->remaining -= *len;
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if (ctx->remaining == 0) {
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return APR_EOF;
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}
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return APR_SUCCESS;
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}
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static apr_status_t serf_mmap_peek(serf_bucket_t *bucket,
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const char **data,
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apr_size_t *len)
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{
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/* Oh, bah. */
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return APR_ENOTIMPL;
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}
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const serf_bucket_type_t serf_bucket_type_mmap = {
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"MMAP",
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serf_mmap_read,
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serf_mmap_readline,
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serf_default_read_iovec,
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serf_default_read_for_sendfile,
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serf_default_read_bucket,
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serf_mmap_peek,
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serf_default_destroy_and_data,
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};
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#else /* !APR_HAS_MMAP */
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serf_bucket_t *serf_bucket_mmap_create(apr_mmap_t *file_mmap,
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serf_bucket_alloc_t *allocator)
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{
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return NULL;
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}
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const serf_bucket_type_t serf_bucket_type_mmap = {
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"MMAP",
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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};
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#endif
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