1/* Copyright 2002-2004 Justin Erenkrantz and Greg Stein 2 * 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16#include <apr_pools.h> 17#include <apr_mmap.h> 18 19#include "serf.h" 20#include "serf_bucket_util.h" 21 22#if APR_HAS_MMAP 23 24typedef struct { 25 apr_mmap_t *mmap; 26 void *current; 27 apr_off_t offset; 28 apr_off_t remaining; 29} mmap_context_t; 30 31 32serf_bucket_t *serf_bucket_mmap_create( 33 apr_mmap_t *file_mmap, 34 serf_bucket_alloc_t *allocator) 35{ 36 mmap_context_t *ctx; 37 38 ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx)); 39 ctx->mmap = file_mmap; 40 ctx->current = NULL; 41 ctx->offset = 0; 42 ctx->remaining = ctx->mmap->size; 43 44 return serf_bucket_create(&serf_bucket_type_mmap, allocator, ctx); 45} 46 47static apr_status_t serf_mmap_read(serf_bucket_t *bucket, 48 apr_size_t requested, 49 const char **data, apr_size_t *len) 50{ 51 mmap_context_t *ctx = bucket->data; 52 53 if (requested == SERF_READ_ALL_AVAIL || requested > ctx->remaining) { 54 *len = ctx->remaining; 55 } 56 else { 57 *len = requested; 58 } 59 60 /* ### Would it be faster to call this once and do the offset ourselves? */ 61 apr_mmap_offset((void**)data, ctx->mmap, ctx->offset); 62 63 /* For the next read... */ 64 ctx->offset += *len; 65 ctx->remaining -= *len; 66 67 if (ctx->remaining == 0) { 68 return APR_EOF; 69 } 70 return APR_SUCCESS; 71} 72 73static apr_status_t serf_mmap_readline(serf_bucket_t *bucket, 74 int acceptable, int *found, 75 const char **data, apr_size_t *len) 76{ 77 mmap_context_t *ctx = bucket->data; 78 const char *end; 79 80 /* ### Would it be faster to call this once and do the offset ourselves? */ 81 apr_mmap_offset((void**)data, ctx->mmap, ctx->offset); 82 end = *data; 83 84 /* XXX An overflow is generated if we pass &ctx->remaining to readline. 85 * Not real clear why. 86 */ 87 *len = ctx->remaining; 88 89 serf_util_readline(&end, len, acceptable, found); 90 91 *len = end - *data; 92 93 ctx->offset += *len; 94 ctx->remaining -= *len; 95 96 if (ctx->remaining == 0) { 97 return APR_EOF; 98 } 99 return APR_SUCCESS; 100} 101 102static apr_status_t serf_mmap_peek(serf_bucket_t *bucket, 103 const char **data, 104 apr_size_t *len) 105{ 106 /* Oh, bah. */ 107 return APR_ENOTIMPL; 108} 109 110const serf_bucket_type_t serf_bucket_type_mmap = { 111 "MMAP", 112 serf_mmap_read, 113 serf_mmap_readline, 114 serf_default_read_iovec, 115 serf_default_read_for_sendfile, 116 serf_default_read_bucket, 117 serf_mmap_peek, 118 serf_default_destroy_and_data, 119}; 120 121#else /* !APR_HAS_MMAP */ 122 123serf_bucket_t *serf_bucket_mmap_create(apr_mmap_t *file_mmap, 124 serf_bucket_alloc_t *allocator) 125{ 126 return NULL; 127} 128 129const serf_bucket_type_t serf_bucket_type_mmap = { 130 "MMAP", 131 NULL, 132 NULL, 133 NULL, 134 NULL, 135 NULL, 136 NULL, 137 NULL, 138}; 139 140#endif 141