Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | 6169d5f | 2016-03-31 07:46:18 -0700 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 34 | #include "src/core/lib/transport/metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 35 | |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 36 | #include <assert.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 37 | #include <stddef.h> |
| 38 | #include <string.h> |
| 39 | |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 40 | #include <grpc/compression.h> |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 41 | #include <grpc/grpc.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 42 | #include <grpc/support/alloc.h> |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 43 | #include <grpc/support/atm.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 44 | #include <grpc/support/log.h> |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 45 | #include <grpc/support/string_util.h> |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 46 | #include <grpc/support/time.h> |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 47 | |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 48 | #include "src/core/lib/iomgr/iomgr_internal.h" |
| 49 | #include "src/core/lib/profiling/timers.h" |
| 50 | #include "src/core/lib/support/murmur_hash.h" |
| 51 | #include "src/core/lib/support/string.h" |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 52 | #include "src/core/lib/transport/static_metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 53 | |
Craig Tiller | f82ddc4 | 2016-04-05 17:15:07 -0700 | [diff] [blame] | 54 | gpr_slice (*grpc_chttp2_base64_encode_and_huffman_compress)(gpr_slice input); |
| 55 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 56 | /* There are two kinds of mdelem and mdstr instances. |
| 57 | * Static instances are declared in static_metadata.{h,c} and |
| 58 | * are initialized by grpc_mdctx_global_init(). |
| 59 | * Dynamic instances are stored in hash tables on grpc_mdctx, and are backed |
| 60 | * by internal_string and internal_element structures. |
| 61 | * Internal helper functions here-in (is_mdstr_static, is_mdelem_static) are |
| 62 | * used to determine which kind of element a pointer refers to. |
| 63 | */ |
| 64 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 65 | #define INITIAL_STRTAB_CAPACITY 4 |
| 66 | #define INITIAL_MDTAB_CAPACITY 4 |
| 67 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 68 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 69 | #define DEBUG_ARGS , const char *file, int line |
| 70 | #define FWD_DEBUG_ARGS , file, line |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 71 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s), __FILE__, __LINE__) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 72 | #else |
| 73 | #define DEBUG_ARGS |
| 74 | #define FWD_DEBUG_ARGS |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 75 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s)) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 76 | #endif |
| 77 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 78 | #define TABLE_IDX(hash, log2_shards, capacity) \ |
| 79 | (((hash) >> (log2_shards)) % (capacity)) |
| 80 | #define SHARD_IDX(hash, log2_shards) ((hash) & ((1 << (log2_shards)) - 1)) |
| 81 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 82 | typedef void (*destroy_user_data_func)(void *user_data); |
| 83 | |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 84 | #define SIZE_IN_DECODER_TABLE_NOT_SET -1 |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 85 | /* Shadow structure for grpc_mdstr for non-static values */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 86 | typedef struct internal_string { |
| 87 | /* must be byte compatible with grpc_mdstr */ |
| 88 | gpr_slice slice; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 89 | uint32_t hash; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 90 | |
| 91 | /* private only data */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 92 | gpr_atm refcnt; |
| 93 | |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 94 | uint8_t has_base64_and_huffman_encoded; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 95 | gpr_slice_refcount refcount; |
| 96 | |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 97 | gpr_slice base64_and_huffman; |
| 98 | |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 99 | gpr_atm size_in_decoder_table; |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 100 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 101 | struct internal_string *bucket_next; |
| 102 | } internal_string; |
| 103 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 104 | /* Shadow structure for grpc_mdelem for non-static elements */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 105 | typedef struct internal_metadata { |
| 106 | /* must be byte compatible with grpc_mdelem */ |
| 107 | internal_string *key; |
| 108 | internal_string *value; |
| 109 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 110 | /* private only data */ |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 111 | gpr_atm refcnt; |
| 112 | |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 113 | gpr_mu mu_user_data; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 114 | gpr_atm destroy_user_data; |
| 115 | gpr_atm user_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 116 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 117 | struct internal_metadata *bucket_next; |
| 118 | } internal_metadata; |
| 119 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 120 | typedef struct strtab_shard { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 121 | gpr_mu mu; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 122 | internal_string **strs; |
| 123 | size_t count; |
| 124 | size_t capacity; |
| 125 | } strtab_shard; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 126 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 127 | typedef struct mdtab_shard { |
| 128 | gpr_mu mu; |
| 129 | internal_metadata **elems; |
| 130 | size_t count; |
| 131 | size_t capacity; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 132 | /** Estimate of the number of unreferenced mdelems in the hash table. |
| 133 | This will eventually converge to the exact number, but it's instantaneous |
| 134 | accuracy is not guaranteed */ |
| 135 | gpr_atm free_estimate; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 136 | } mdtab_shard; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 137 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 138 | #define LOG2_STRTAB_SHARD_COUNT 5 |
| 139 | #define LOG2_MDTAB_SHARD_COUNT 4 |
| 140 | #define STRTAB_SHARD_COUNT ((size_t)(1 << LOG2_STRTAB_SHARD_COUNT)) |
| 141 | #define MDTAB_SHARD_COUNT ((size_t)(1 << LOG2_MDTAB_SHARD_COUNT)) |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 142 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 143 | /* hash seed: decided at initialization time */ |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 144 | static uint32_t g_hash_seed; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 145 | static int g_forced_hash_seed = 0; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 146 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 147 | /* linearly probed hash tables for static element lookup */ |
| 148 | static grpc_mdstr *g_static_strtab[GRPC_STATIC_MDSTR_COUNT * 2]; |
| 149 | static grpc_mdelem *g_static_mdtab[GRPC_STATIC_MDELEM_COUNT * 2]; |
| 150 | static size_t g_static_strtab_maxprobe; |
| 151 | static size_t g_static_mdtab_maxprobe; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 152 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 153 | static strtab_shard g_strtab_shard[STRTAB_SHARD_COUNT]; |
| 154 | static mdtab_shard g_mdtab_shard[MDTAB_SHARD_COUNT]; |
| 155 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 156 | static void gc_mdtab(mdtab_shard *shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 157 | |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 158 | void grpc_test_only_set_metadata_hash_seed(uint32_t seed) { |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 159 | g_hash_seed = seed; |
| 160 | g_forced_hash_seed = 1; |
| 161 | } |
| 162 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 163 | void grpc_mdctx_global_init(void) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 164 | size_t i, j; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 165 | if (!g_forced_hash_seed) { |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 166 | g_hash_seed = (uint32_t)gpr_now(GPR_CLOCK_REALTIME).tv_nsec; |
Craig Tiller | e62bf98 | 2015-12-02 17:11:49 -0800 | [diff] [blame] | 167 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 168 | g_static_strtab_maxprobe = 0; |
| 169 | g_static_mdtab_maxprobe = 0; |
| 170 | /* build static tables */ |
| 171 | memset(g_static_mdtab, 0, sizeof(g_static_mdtab)); |
| 172 | memset(g_static_strtab, 0, sizeof(g_static_strtab)); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 173 | for (i = 0; i < GRPC_STATIC_MDSTR_COUNT; i++) { |
| 174 | grpc_mdstr *elem = &grpc_static_mdstr_table[i]; |
| 175 | const char *str = grpc_static_metadata_strings[i]; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 176 | uint32_t hash = gpr_murmur_hash3(str, strlen(str), g_hash_seed); |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 177 | *(gpr_slice *)&elem->slice = gpr_slice_from_static_string(str); |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 178 | *(uint32_t *)&elem->hash = hash; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 179 | for (j = 0;; j++) { |
| 180 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_strtab); |
| 181 | if (g_static_strtab[idx] == NULL) { |
| 182 | g_static_strtab[idx] = &grpc_static_mdstr_table[i]; |
| 183 | break; |
| 184 | } |
| 185 | } |
| 186 | if (j > g_static_strtab_maxprobe) { |
| 187 | g_static_strtab_maxprobe = j; |
| 188 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 189 | } |
| 190 | for (i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) { |
| 191 | grpc_mdelem *elem = &grpc_static_mdelem_table[i]; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 192 | grpc_mdstr *key = |
| 193 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 0]]; |
| 194 | grpc_mdstr *value = |
| 195 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 1]]; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 196 | uint32_t hash = GRPC_MDSTR_KV_HASH(key->hash, value->hash); |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 197 | *(grpc_mdstr **)&elem->key = key; |
| 198 | *(grpc_mdstr **)&elem->value = value; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 199 | for (j = 0;; j++) { |
| 200 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 201 | if (g_static_mdtab[idx] == NULL) { |
| 202 | g_static_mdtab[idx] = elem; |
| 203 | break; |
| 204 | } |
| 205 | } |
| 206 | if (j > g_static_mdtab_maxprobe) { |
| 207 | g_static_mdtab_maxprobe = j; |
| 208 | } |
| 209 | } |
| 210 | /* initialize shards */ |
| 211 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 212 | strtab_shard *shard = &g_strtab_shard[i]; |
| 213 | gpr_mu_init(&shard->mu); |
| 214 | shard->count = 0; |
| 215 | shard->capacity = INITIAL_STRTAB_CAPACITY; |
| 216 | shard->strs = gpr_malloc(sizeof(*shard->strs) * shard->capacity); |
| 217 | memset(shard->strs, 0, sizeof(*shard->strs) * shard->capacity); |
| 218 | } |
| 219 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 220 | mdtab_shard *shard = &g_mdtab_shard[i]; |
| 221 | gpr_mu_init(&shard->mu); |
| 222 | shard->count = 0; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 223 | gpr_atm_no_barrier_store(&shard->free_estimate, 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 224 | shard->capacity = INITIAL_MDTAB_CAPACITY; |
| 225 | shard->elems = gpr_malloc(sizeof(*shard->elems) * shard->capacity); |
| 226 | memset(shard->elems, 0, sizeof(*shard->elems) * shard->capacity); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 227 | } |
| 228 | } |
| 229 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 230 | void grpc_mdctx_global_shutdown(void) { |
| 231 | size_t i; |
| 232 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 233 | mdtab_shard *shard = &g_mdtab_shard[i]; |
| 234 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 235 | gc_mdtab(shard); |
| 236 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 237 | if (shard->count != 0) { |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 238 | gpr_log(GPR_DEBUG, "WARNING: %d metadata elements were leaked", |
| 239 | shard->count); |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 240 | if (grpc_iomgr_abort_on_leaks()) { |
| 241 | abort(); |
| 242 | } |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 243 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 244 | gpr_free(shard->elems); |
| 245 | } |
| 246 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 247 | strtab_shard *shard = &g_strtab_shard[i]; |
| 248 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 249 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 250 | if (shard->count != 0) { |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 251 | gpr_log(GPR_DEBUG, "WARNING: %d metadata strings were leaked", |
| 252 | shard->count); |
Craig Tiller | 3693078 | 2016-04-04 20:57:53 -0700 | [diff] [blame] | 253 | for (size_t j = 0; j < shard->capacity; j++) { |
| 254 | for (internal_string *s = shard->strs[j]; s; s = s->bucket_next) { |
Craig Tiller | 7bfd8be | 2016-04-04 22:10:25 -0700 | [diff] [blame] | 255 | gpr_log(GPR_DEBUG, "LEAKED: %s", |
| 256 | grpc_mdstr_as_c_string((grpc_mdstr *)s)); |
Craig Tiller | 3693078 | 2016-04-04 20:57:53 -0700 | [diff] [blame] | 257 | } |
| 258 | } |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 259 | if (grpc_iomgr_abort_on_leaks()) { |
| 260 | abort(); |
| 261 | } |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 262 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 263 | gpr_free(shard->strs); |
| 264 | } |
| 265 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 266 | |
| 267 | static int is_mdstr_static(grpc_mdstr *s) { |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 268 | return s >= &grpc_static_mdstr_table[0] && |
| 269 | s < &grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | static int is_mdelem_static(grpc_mdelem *e) { |
Craig Tiller | b774be4 | 2015-11-19 07:56:13 -0800 | [diff] [blame] | 273 | return e >= &grpc_static_mdelem_table[0] && |
| 274 | e < &grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 275 | } |
| 276 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 277 | static void ref_md_locked(mdtab_shard *shard, |
| 278 | internal_metadata *md DEBUG_ARGS) { |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 279 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 280 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 281 | "ELM REF:%p:%d->%d: '%s' = '%s'", md, |
| 282 | gpr_atm_no_barrier_load(&md->refcnt), |
| 283 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 284 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 285 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 286 | #endif |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 287 | if (0 == gpr_atm_no_barrier_fetch_add(&md->refcnt, 1)) { |
| 288 | gpr_atm_no_barrier_fetch_add(&shard->free_estimate, -1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 292 | static void grow_strtab(strtab_shard *shard) { |
| 293 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 294 | size_t i; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 295 | internal_string **strtab; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 296 | internal_string *s, *next; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 297 | |
| 298 | GPR_TIMER_BEGIN("grow_strtab", 0); |
| 299 | |
| 300 | strtab = gpr_malloc(sizeof(internal_string *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 301 | memset(strtab, 0, sizeof(internal_string *) * capacity); |
| 302 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 303 | for (i = 0; i < shard->capacity; i++) { |
| 304 | for (s = shard->strs[i]; s; s = next) { |
| 305 | size_t idx = TABLE_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT, capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 306 | next = s->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 307 | s->bucket_next = strtab[idx]; |
| 308 | strtab[idx] = s; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 309 | } |
| 310 | } |
| 311 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 312 | gpr_free(shard->strs); |
| 313 | shard->strs = strtab; |
| 314 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 315 | |
| 316 | GPR_TIMER_END("grow_strtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 317 | } |
| 318 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 319 | static void internal_destroy_string(strtab_shard *shard, internal_string *is) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 320 | internal_string **prev_next; |
| 321 | internal_string *cur; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 322 | GPR_TIMER_BEGIN("internal_destroy_string", 0); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 323 | if (is->has_base64_and_huffman_encoded) { |
| 324 | gpr_slice_unref(is->base64_and_huffman); |
| 325 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 326 | for (prev_next = &shard->strs[TABLE_IDX(is->hash, LOG2_STRTAB_SHARD_COUNT, |
| 327 | shard->capacity)], |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 328 | cur = *prev_next; |
| 329 | cur != is; prev_next = &cur->bucket_next, cur = cur->bucket_next) |
| 330 | ; |
| 331 | *prev_next = cur->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 332 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 333 | gpr_free(is); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 334 | GPR_TIMER_END("internal_destroy_string", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 335 | } |
| 336 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 337 | static void slice_ref(void *p) { |
| 338 | internal_string *is = |
| 339 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 340 | GRPC_MDSTR_REF((grpc_mdstr *)(is)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | static void slice_unref(void *p) { |
| 344 | internal_string *is = |
| 345 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 346 | GRPC_MDSTR_UNREF((grpc_mdstr *)(is)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 347 | } |
| 348 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 349 | grpc_mdstr *grpc_mdstr_from_string(const char *str) { |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 350 | return grpc_mdstr_from_buffer((const uint8_t *)str, strlen(str)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 351 | } |
| 352 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 353 | grpc_mdstr *grpc_mdstr_from_slice(gpr_slice slice) { |
| 354 | grpc_mdstr *result = grpc_mdstr_from_buffer(GPR_SLICE_START_PTR(slice), |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 355 | GPR_SLICE_LENGTH(slice)); |
| 356 | gpr_slice_unref(slice); |
| 357 | return result; |
| 358 | } |
| 359 | |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 360 | grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *buf, size_t length) { |
| 361 | uint32_t hash = gpr_murmur_hash3(buf, length, g_hash_seed); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 362 | internal_string *s; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 363 | strtab_shard *shard = |
| 364 | &g_strtab_shard[SHARD_IDX(hash, LOG2_STRTAB_SHARD_COUNT)]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 365 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 366 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 367 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 368 | GPR_TIMER_BEGIN("grpc_mdstr_from_buffer", 0); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 369 | |
| 370 | /* search for a static string */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 371 | for (i = 0; i <= g_static_strtab_maxprobe; i++) { |
| 372 | grpc_mdstr *ss; |
| 373 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_strtab); |
| 374 | ss = g_static_strtab[idx]; |
| 375 | if (ss == NULL) break; |
| 376 | if (ss->hash == hash && GPR_SLICE_LENGTH(ss->slice) == length && |
Craig Tiller | 93dd047 | 2016-05-18 15:06:37 -0700 | [diff] [blame] | 377 | (length == 0 || |
| 378 | 0 == memcmp(buf, GPR_SLICE_START_PTR(ss->slice), length))) { |
Craig Tiller | 07718b8 | 2015-11-21 14:06:45 -0800 | [diff] [blame] | 379 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 380 | return ss; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 381 | } |
| 382 | } |
| 383 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 384 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 385 | |
| 386 | /* search for an existing string */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 387 | idx = TABLE_IDX(hash, LOG2_STRTAB_SHARD_COUNT, shard->capacity); |
| 388 | for (s = shard->strs[idx]; s; s = s->bucket_next) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 389 | if (s->hash == hash && GPR_SLICE_LENGTH(s->slice) == length && |
| 390 | 0 == memcmp(buf, GPR_SLICE_START_PTR(s->slice), length)) { |
Craig Tiller | 773d990 | 2016-04-26 18:27:31 -0700 | [diff] [blame] | 391 | if (gpr_atm_full_fetch_add(&s->refcnt, 1) == 0) { |
| 392 | /* If we get here, we've added a ref to something that was about to |
| 393 | * die - drop it immediately. |
| 394 | * The *only* possible path here (given the shard mutex) should be to |
| 395 | * drop from one ref back to zero - assert that with a CAS */ |
| 396 | GPR_ASSERT(gpr_atm_rel_cas(&s->refcnt, 1, 0)); |
| 397 | /* and treat this as if we were never here... sshhh */ |
| 398 | } else { |
| 399 | gpr_mu_unlock(&shard->mu); |
| 400 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
| 401 | return (grpc_mdstr *)s; |
| 402 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 403 | } |
| 404 | } |
| 405 | |
| 406 | /* not found: create a new string */ |
| 407 | if (length + 1 < GPR_SLICE_INLINED_SIZE) { |
| 408 | /* string data goes directly into the slice */ |
| 409 | s = gpr_malloc(sizeof(internal_string)); |
Craig Tiller | 773d990 | 2016-04-26 18:27:31 -0700 | [diff] [blame] | 410 | gpr_atm_rel_store(&s->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 411 | s->slice.refcount = NULL; |
| 412 | memcpy(s->slice.data.inlined.bytes, buf, length); |
| 413 | s->slice.data.inlined.bytes[length] = 0; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 414 | s->slice.data.inlined.length = (uint8_t)length; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 415 | } else { |
| 416 | /* string data goes after the internal_string header, and we +1 for null |
| 417 | terminator */ |
| 418 | s = gpr_malloc(sizeof(internal_string) + length + 1); |
Craig Tiller | 773d990 | 2016-04-26 18:27:31 -0700 | [diff] [blame] | 419 | gpr_atm_rel_store(&s->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 420 | s->refcount.ref = slice_ref; |
| 421 | s->refcount.unref = slice_unref; |
| 422 | s->slice.refcount = &s->refcount; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 423 | s->slice.data.refcounted.bytes = (uint8_t *)(s + 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 424 | s->slice.data.refcounted.length = length; |
| 425 | memcpy(s->slice.data.refcounted.bytes, buf, length); |
| 426 | /* add a null terminator for cheap c string conversion when desired */ |
| 427 | s->slice.data.refcounted.bytes[length] = 0; |
| 428 | } |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 429 | s->has_base64_and_huffman_encoded = 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 430 | s->hash = hash; |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 431 | s->size_in_decoder_table = SIZE_IN_DECODER_TABLE_NOT_SET; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 432 | s->bucket_next = shard->strs[idx]; |
| 433 | shard->strs[idx] = s; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 434 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 435 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 436 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 437 | if (shard->count > shard->capacity * 2) { |
| 438 | grow_strtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 439 | } |
| 440 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 441 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 442 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 443 | |
| 444 | return (grpc_mdstr *)s; |
| 445 | } |
| 446 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 447 | static void gc_mdtab(mdtab_shard *shard) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 448 | size_t i; |
| 449 | internal_metadata **prev_next; |
| 450 | internal_metadata *md, *next; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 451 | gpr_atm num_freed = 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 452 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 453 | GPR_TIMER_BEGIN("gc_mdtab", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 454 | for (i = 0; i < shard->capacity; i++) { |
| 455 | prev_next = &shard->elems[i]; |
| 456 | for (md = shard->elems[i]; md; md = next) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 457 | void *user_data = (void *)gpr_atm_no_barrier_load(&md->user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 458 | next = md->bucket_next; |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 459 | if (gpr_atm_acq_load(&md->refcnt) == 0) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 460 | GRPC_MDSTR_UNREF((grpc_mdstr *)md->key); |
| 461 | GRPC_MDSTR_UNREF((grpc_mdstr *)md->value); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 462 | if (md->user_data) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 463 | ((destroy_user_data_func)gpr_atm_no_barrier_load( |
| 464 | &md->destroy_user_data))(user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 465 | } |
| 466 | gpr_free(md); |
| 467 | *prev_next = next; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 468 | num_freed++; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 469 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 470 | } else { |
| 471 | prev_next = &md->bucket_next; |
| 472 | } |
| 473 | } |
| 474 | } |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 475 | gpr_atm_no_barrier_fetch_add(&shard->free_estimate, -num_freed); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 476 | GPR_TIMER_END("gc_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 477 | } |
| 478 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 479 | static void grow_mdtab(mdtab_shard *shard) { |
| 480 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 481 | size_t i; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 482 | internal_metadata **mdtab; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 483 | internal_metadata *md, *next; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 484 | uint32_t hash; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 485 | |
| 486 | GPR_TIMER_BEGIN("grow_mdtab", 0); |
| 487 | |
| 488 | mdtab = gpr_malloc(sizeof(internal_metadata *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 489 | memset(mdtab, 0, sizeof(internal_metadata *) * capacity); |
| 490 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 491 | for (i = 0; i < shard->capacity; i++) { |
| 492 | for (md = shard->elems[i]; md; md = next) { |
| 493 | size_t idx; |
ctiller | fb93d19 | 2014-12-15 10:40:05 -0800 | [diff] [blame] | 494 | hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 495 | next = md->bucket_next; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 496 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, capacity); |
| 497 | md->bucket_next = mdtab[idx]; |
| 498 | mdtab[idx] = md; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 499 | } |
| 500 | } |
| 501 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 502 | gpr_free(shard->elems); |
| 503 | shard->elems = mdtab; |
| 504 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 505 | |
| 506 | GPR_TIMER_END("grow_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 507 | } |
| 508 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 509 | static void rehash_mdtab(mdtab_shard *shard) { |
Craig Tiller | 139098c | 2016-06-06 08:10:08 -0700 | [diff] [blame^] | 510 | if (gpr_atm_no_barrier_load(&shard->free_estimate) > |
| 511 | (gpr_atm)(shard->capacity / 4)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 512 | gc_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 513 | } else { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 514 | grow_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 515 | } |
| 516 | } |
| 517 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 518 | grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_mdstr *mkey, |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 519 | grpc_mdstr *mvalue) { |
| 520 | internal_string *key = (internal_string *)mkey; |
| 521 | internal_string *value = (internal_string *)mvalue; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 522 | uint32_t hash = GRPC_MDSTR_KV_HASH(mkey->hash, mvalue->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 523 | internal_metadata *md; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 524 | mdtab_shard *shard = &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 525 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 526 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 527 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 528 | GPR_TIMER_BEGIN("grpc_mdelem_from_metadata_strings", 0); |
| 529 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 530 | if (is_mdstr_static(mkey) && is_mdstr_static(mvalue)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 531 | for (i = 0; i <= g_static_mdtab_maxprobe; i++) { |
| 532 | grpc_mdelem *smd; |
| 533 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 534 | smd = g_static_mdtab[idx]; |
| 535 | if (smd == NULL) break; |
| 536 | if (smd->key == mkey && smd->value == mvalue) { |
Craig Tiller | 07718b8 | 2015-11-21 14:06:45 -0800 | [diff] [blame] | 537 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 538 | return smd; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 539 | } |
| 540 | } |
| 541 | } |
| 542 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 543 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 544 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 545 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, shard->capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 546 | /* search for an existing pair */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 547 | for (md = shard->elems[idx]; md; md = md->bucket_next) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 548 | if (md->key == key && md->value == value) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 549 | REF_MD_LOCKED(shard, md); |
| 550 | GRPC_MDSTR_UNREF((grpc_mdstr *)key); |
| 551 | GRPC_MDSTR_UNREF((grpc_mdstr *)value); |
| 552 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 553 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 554 | return (grpc_mdelem *)md; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* not found: create a new pair */ |
| 559 | md = gpr_malloc(sizeof(internal_metadata)); |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 560 | gpr_atm_rel_store(&md->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 561 | md->key = key; |
| 562 | md->value = value; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 563 | md->user_data = 0; |
| 564 | md->destroy_user_data = 0; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 565 | md->bucket_next = shard->elems[idx]; |
| 566 | shard->elems[idx] = md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 567 | gpr_mu_init(&md->mu_user_data); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 568 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 569 | gpr_log(GPR_DEBUG, "ELM NEW:%p:%d: '%s' = '%s'", md, |
| 570 | gpr_atm_no_barrier_load(&md->refcnt), |
| 571 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 572 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 573 | #endif |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 574 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 575 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 576 | if (shard->count > shard->capacity * 2) { |
| 577 | rehash_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 578 | } |
| 579 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 580 | gpr_mu_unlock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 581 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 582 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
| 583 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 584 | return (grpc_mdelem *)md; |
| 585 | } |
| 586 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 587 | grpc_mdelem *grpc_mdelem_from_strings(const char *key, const char *value) { |
| 588 | return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_string(key), |
| 589 | grpc_mdstr_from_string(value)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 590 | } |
| 591 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 592 | grpc_mdelem *grpc_mdelem_from_slices(gpr_slice key, gpr_slice value) { |
| 593 | return grpc_mdelem_from_metadata_strings(grpc_mdstr_from_slice(key), |
| 594 | grpc_mdstr_from_slice(value)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 595 | } |
| 596 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 597 | grpc_mdelem *grpc_mdelem_from_string_and_buffer(const char *key, |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 598 | const uint8_t *value, |
Craig Tiller | 4dbdd6a | 2015-09-25 15:12:16 -0700 | [diff] [blame] | 599 | size_t value_length) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 600 | return grpc_mdelem_from_metadata_strings( |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 601 | grpc_mdstr_from_string(key), grpc_mdstr_from_buffer(value, value_length)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 602 | } |
| 603 | |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame] | 604 | static size_t get_base64_encoded_size(size_t raw_length) { |
| 605 | static const uint8_t tail_xtra[3] = {0, 2, 3}; |
| 606 | return raw_length / 3 * 4 + tail_xtra[raw_length % 3]; |
| 607 | } |
| 608 | |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 609 | size_t grpc_mdelem_get_size_in_hpack_table(grpc_mdelem *elem) { |
| 610 | size_t overhead_and_key = 32 + GPR_SLICE_LENGTH(elem->key->slice); |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame] | 611 | size_t value_len = GPR_SLICE_LENGTH(elem->value->slice); |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 612 | if (is_mdstr_static(elem->value)) { |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame] | 613 | if (grpc_is_binary_header( |
| 614 | (const char *)GPR_SLICE_START_PTR(elem->key->slice), |
| 615 | GPR_SLICE_LENGTH(elem->key->slice))) { |
| 616 | return overhead_and_key + get_base64_encoded_size(value_len); |
| 617 | } else { |
| 618 | return overhead_and_key + value_len; |
| 619 | } |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 620 | } else { |
| 621 | internal_string *is = (internal_string *)elem->value; |
yang-g | 9cedd3f | 2016-04-01 00:24:59 -0700 | [diff] [blame] | 622 | gpr_atm current_size = gpr_atm_acq_load(&is->size_in_decoder_table); |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 623 | if (current_size == SIZE_IN_DECODER_TABLE_NOT_SET) { |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 624 | if (grpc_is_binary_header( |
| 625 | (const char *)GPR_SLICE_START_PTR(elem->key->slice), |
| 626 | GPR_SLICE_LENGTH(elem->key->slice))) { |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 627 | current_size = (gpr_atm)get_base64_encoded_size(value_len); |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 628 | } else { |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 629 | current_size = (gpr_atm)value_len; |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 630 | } |
yang-g | 9cedd3f | 2016-04-01 00:24:59 -0700 | [diff] [blame] | 631 | gpr_atm_rel_store(&is->size_in_decoder_table, current_size); |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 632 | } |
yang-g | 4a530b0 | 2016-03-31 11:44:44 -0700 | [diff] [blame] | 633 | return overhead_and_key + (size_t)current_size; |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 634 | } |
| 635 | } |
| 636 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 637 | grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 638 | internal_metadata *md = (internal_metadata *)gmd; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 639 | if (is_mdelem_static(gmd)) return gmd; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 640 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 641 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 642 | "ELM REF:%p:%d->%d: '%s' = '%s'", md, |
| 643 | gpr_atm_no_barrier_load(&md->refcnt), |
| 644 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 645 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 646 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 647 | #endif |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 648 | /* we can assume the ref count is >= 1 as the application is calling |
| 649 | this function - meaning that no adjustment to mdtab_free is necessary, |
| 650 | simplifying the logic here to be just an atomic increment */ |
| 651 | /* use C assert to have this removed in opt builds */ |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 652 | assert(gpr_atm_no_barrier_load(&md->refcnt) >= 1); |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 653 | gpr_atm_no_barrier_fetch_add(&md->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 654 | return gmd; |
| 655 | } |
| 656 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 657 | void grpc_mdelem_unref(grpc_mdelem *gmd DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 658 | internal_metadata *md = (internal_metadata *)gmd; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 659 | if (!md) return; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 660 | if (is_mdelem_static(gmd)) return; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 661 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 662 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 663 | "ELM UNREF:%p:%d->%d: '%s' = '%s'", md, |
| 664 | gpr_atm_no_barrier_load(&md->refcnt), |
| 665 | gpr_atm_no_barrier_load(&md->refcnt) - 1, |
| 666 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 667 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
| 668 | #endif |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 669 | uint32_t hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
| 670 | if (1 == gpr_atm_full_fetch_add(&md->refcnt, -1)) { |
| 671 | /* once the refcount hits zero, some other thread can come along and |
| 672 | free md at any time: it's unsafe from this point on to access it */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 673 | mdtab_shard *shard = |
| 674 | &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 675 | gpr_atm_no_barrier_fetch_add(&shard->free_estimate, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 676 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | const char *grpc_mdstr_as_c_string(grpc_mdstr *s) { |
| 680 | return (const char *)GPR_SLICE_START_PTR(s->slice); |
| 681 | } |
| 682 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 683 | grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 684 | internal_string *s = (internal_string *)gs; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 685 | if (is_mdstr_static(gs)) return gs; |
Craig Tiller | 773d990 | 2016-04-26 18:27:31 -0700 | [diff] [blame] | 686 | GPR_ASSERT(gpr_atm_full_fetch_add(&s->refcnt, 1) > 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 687 | return gs; |
| 688 | } |
| 689 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 690 | void grpc_mdstr_unref(grpc_mdstr *gs DEBUG_ARGS) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 691 | internal_string *s = (internal_string *)gs; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 692 | if (is_mdstr_static(gs)) return; |
Craig Tiller | 773d990 | 2016-04-26 18:27:31 -0700 | [diff] [blame] | 693 | if (1 == gpr_atm_full_fetch_add(&s->refcnt, -1)) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 694 | strtab_shard *shard = |
| 695 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 696 | gpr_mu_lock(&shard->mu); |
Craig Tiller | 773d990 | 2016-04-26 18:27:31 -0700 | [diff] [blame] | 697 | GPR_ASSERT(0 == gpr_atm_no_barrier_load(&s->refcnt)); |
| 698 | internal_destroy_string(shard, s); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 699 | gpr_mu_unlock(&shard->mu); |
| 700 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 701 | } |
| 702 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 703 | void *grpc_mdelem_get_user_data(grpc_mdelem *md, void (*destroy_func)(void *)) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 704 | internal_metadata *im = (internal_metadata *)md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 705 | void *result; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 706 | if (is_mdelem_static(md)) { |
| 707 | return (void *)grpc_static_mdelem_user_data[md - grpc_static_mdelem_table]; |
| 708 | } |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 709 | if (gpr_atm_acq_load(&im->destroy_user_data) == (gpr_atm)destroy_func) { |
| 710 | return (void *)gpr_atm_no_barrier_load(&im->user_data); |
| 711 | } else { |
| 712 | return NULL; |
| 713 | } |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 714 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | void grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *), |
| 718 | void *user_data) { |
| 719 | internal_metadata *im = (internal_metadata *)md; |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 720 | GPR_ASSERT(!is_mdelem_static(md)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 721 | GPR_ASSERT((user_data == NULL) == (destroy_func == NULL)); |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 722 | gpr_mu_lock(&im->mu_user_data); |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 723 | if (gpr_atm_no_barrier_load(&im->destroy_user_data)) { |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 724 | /* user data can only be set once */ |
| 725 | gpr_mu_unlock(&im->mu_user_data); |
| 726 | if (destroy_func != NULL) { |
| 727 | destroy_func(user_data); |
| 728 | } |
| 729 | return; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 730 | } |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 731 | gpr_atm_no_barrier_store(&im->user_data, (gpr_atm)user_data); |
| 732 | gpr_atm_rel_store(&im->destroy_user_data, (gpr_atm)destroy_func); |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 733 | gpr_mu_unlock(&im->mu_user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 734 | } |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 735 | |
| 736 | gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) { |
| 737 | internal_string *s = (internal_string *)gs; |
| 738 | gpr_slice slice; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 739 | strtab_shard *shard = |
| 740 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 741 | gpr_mu_lock(&shard->mu); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 742 | if (!s->has_base64_and_huffman_encoded) { |
| 743 | s->base64_and_huffman = |
| 744 | grpc_chttp2_base64_encode_and_huffman_compress(s->slice); |
ctiller | 33023c4 | 2014-12-12 16:28:33 -0800 | [diff] [blame] | 745 | s->has_base64_and_huffman_encoded = 1; |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 746 | } |
| 747 | slice = s->base64_and_huffman; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 748 | gpr_mu_unlock(&shard->mu); |
ctiller | 430c499 | 2014-12-11 09:15:41 -0800 | [diff] [blame] | 749 | return slice; |
David Garcia Quintas | 2bf574f | 2016-01-14 15:27:08 -0800 | [diff] [blame] | 750 | } |