diff options
Diffstat (limited to 'src/core/ext/client_channel/method_config.c')
| -rw-r--r-- | src/core/ext/client_channel/method_config.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/src/core/ext/client_channel/method_config.c b/src/core/ext/client_channel/method_config.c new file mode 100644 index 0000000000..4313ad5e0e --- /dev/null +++ b/src/core/ext/client_channel/method_config.c @@ -0,0 +1,340 @@ +// +// Copyright 2015, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// + +#include "src/core/ext/client_channel/method_config.h" + +#include <string.h> + +#include <grpc/impl/codegen/grpc_types.h> +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> +#include <grpc/support/string_util.h> +#include <grpc/support/time.h> + +#include "src/core/lib/transport/mdstr_hash_table.h" +#include "src/core/lib/transport/metadata.h" + +// +// grpc_method_config +// + +// bool vtable + +static void* bool_copy(void* valuep) { + bool value = *(bool*)valuep; + bool* new_value = gpr_malloc(sizeof(bool)); + *new_value = value; + return new_value; +} + +static int bool_cmp(void* v1, void* v2) { + bool b1 = *(bool*)v1; + bool b2 = *(bool*)v2; + if (!b1 && b2) return -1; + if (b1 && !b2) return 1; + return 0; +} + +static grpc_mdstr_hash_table_vtable bool_vtable = {gpr_free, bool_copy, + bool_cmp}; + +// timespec vtable + +static void* timespec_copy(void* valuep) { + gpr_timespec value = *(gpr_timespec*)valuep; + gpr_timespec* new_value = gpr_malloc(sizeof(gpr_timespec)); + *new_value = value; + return new_value; +} + +static int timespec_cmp(void* v1, void* v2) { + return gpr_time_cmp(*(gpr_timespec*)v1, *(gpr_timespec*)v2); +} + +static grpc_mdstr_hash_table_vtable timespec_vtable = {gpr_free, timespec_copy, + timespec_cmp}; + +// int32 vtable + +static void* int32_copy(void* valuep) { + int32_t value = *(int32_t*)valuep; + int32_t* new_value = gpr_malloc(sizeof(int32_t)); + *new_value = value; + return new_value; +} + +static int int32_cmp(void* v1, void* v2) { + int32_t i1 = *(int32_t*)v1; + int32_t i2 = *(int32_t*)v2; + if (i1 < i2) return -1; + if (i1 > i2) return 1; + return 0; +} + +static grpc_mdstr_hash_table_vtable int32_vtable = {gpr_free, int32_copy, + int32_cmp}; + +// Hash table keys. +#define GRPC_METHOD_CONFIG_WAIT_FOR_READY "grpc.wait_for_ready" // bool +#define GRPC_METHOD_CONFIG_TIMEOUT "grpc.timeout" // gpr_timespec +#define GRPC_METHOD_CONFIG_MAX_REQUEST_MESSAGE_BYTES \ + "grpc.max_request_message_bytes" // int32 +#define GRPC_METHOD_CONFIG_MAX_RESPONSE_MESSAGE_BYTES \ + "grpc.max_response_message_bytes" // int32 + +struct grpc_method_config { + grpc_mdstr_hash_table* table; + grpc_mdstr* wait_for_ready_key; + grpc_mdstr* timeout_key; + grpc_mdstr* max_request_message_bytes_key; + grpc_mdstr* max_response_message_bytes_key; +}; + +grpc_method_config* grpc_method_config_create( + bool* wait_for_ready, gpr_timespec* timeout, + int32_t* max_request_message_bytes, int32_t* max_response_message_bytes) { + grpc_method_config* method_config = gpr_malloc(sizeof(grpc_method_config)); + memset(method_config, 0, sizeof(grpc_method_config)); + method_config->wait_for_ready_key = + grpc_mdstr_from_string(GRPC_METHOD_CONFIG_WAIT_FOR_READY); + method_config->timeout_key = + grpc_mdstr_from_string(GRPC_METHOD_CONFIG_TIMEOUT); + method_config->max_request_message_bytes_key = + grpc_mdstr_from_string(GRPC_METHOD_CONFIG_MAX_REQUEST_MESSAGE_BYTES); + method_config->max_response_message_bytes_key = + grpc_mdstr_from_string(GRPC_METHOD_CONFIG_MAX_RESPONSE_MESSAGE_BYTES); + grpc_mdstr_hash_table_entry entries[4]; + size_t num_entries = 0; + if (wait_for_ready != NULL) { + entries[num_entries].key = method_config->wait_for_ready_key; + entries[num_entries].value = wait_for_ready; + entries[num_entries].vtable = &bool_vtable; + ++num_entries; + } + if (timeout != NULL) { + entries[num_entries].key = method_config->timeout_key; + entries[num_entries].value = timeout; + entries[num_entries].vtable = ×pec_vtable; + ++num_entries; + } + if (max_request_message_bytes != NULL) { + entries[num_entries].key = method_config->max_request_message_bytes_key; + entries[num_entries].value = max_request_message_bytes; + entries[num_entries].vtable = &int32_vtable; + ++num_entries; + } + if (max_response_message_bytes != NULL) { + entries[num_entries].key = method_config->max_response_message_bytes_key; + entries[num_entries].value = max_response_message_bytes; + entries[num_entries].vtable = &int32_vtable; + ++num_entries; + } + method_config->table = grpc_mdstr_hash_table_create(num_entries, entries); + return method_config; +} + +grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config) { + grpc_mdstr_hash_table_ref(method_config->table); + return method_config; +} + +void grpc_method_config_unref(grpc_method_config* method_config) { + if (grpc_mdstr_hash_table_unref(method_config->table)) { + GRPC_MDSTR_UNREF(method_config->wait_for_ready_key); + GRPC_MDSTR_UNREF(method_config->timeout_key); + GRPC_MDSTR_UNREF(method_config->max_request_message_bytes_key); + GRPC_MDSTR_UNREF(method_config->max_response_message_bytes_key); + gpr_free(method_config); + } +} + +int grpc_method_config_cmp(const grpc_method_config* method_config1, + const grpc_method_config* method_config2) { + return grpc_mdstr_hash_table_cmp(method_config1->table, + method_config2->table); +} + +const bool* grpc_method_config_get_wait_for_ready( + const grpc_method_config* method_config) { + return grpc_mdstr_hash_table_get(method_config->table, + method_config->wait_for_ready_key); +} + +const gpr_timespec* grpc_method_config_get_timeout( + const grpc_method_config* method_config) { + return grpc_mdstr_hash_table_get(method_config->table, + method_config->timeout_key); +} + +const int32_t* grpc_method_config_get_max_request_message_bytes( + const grpc_method_config* method_config) { + return grpc_mdstr_hash_table_get( + method_config->table, method_config->max_request_message_bytes_key); +} + +const int32_t* grpc_method_config_get_max_response_message_bytes( + const grpc_method_config* method_config) { + return grpc_mdstr_hash_table_get( + method_config->table, method_config->max_response_message_bytes_key); +} + +// +// grpc_method_config_table +// + +static void method_config_unref(void* valuep) { + grpc_method_config_unref(valuep); +} + +static void* method_config_ref(void* valuep) { + return grpc_method_config_ref(valuep); +} + +static int method_config_cmp(void* valuep1, void* valuep2) { + return grpc_method_config_cmp(valuep1, valuep2); +} + +static const grpc_mdstr_hash_table_vtable method_config_table_vtable = { + method_config_unref, method_config_ref, method_config_cmp}; + +grpc_method_config_table* grpc_method_config_table_create( + size_t num_entries, grpc_method_config_table_entry* entries) { + grpc_mdstr_hash_table_entry* hash_table_entries = + gpr_malloc(sizeof(grpc_mdstr_hash_table_entry) * num_entries); + for (size_t i = 0; i < num_entries; ++i) { + hash_table_entries[i].key = entries[i].method_name; + hash_table_entries[i].value = entries[i].method_config; + hash_table_entries[i].vtable = &method_config_table_vtable; + } + grpc_method_config_table* method_config_table = + grpc_mdstr_hash_table_create(num_entries, hash_table_entries); + gpr_free(hash_table_entries); + return method_config_table; +} + +grpc_method_config_table* grpc_method_config_table_ref( + grpc_method_config_table* table) { + return grpc_mdstr_hash_table_ref(table); +} + +void grpc_method_config_table_unref(grpc_method_config_table* table) { + grpc_mdstr_hash_table_unref(table); +} + +int grpc_method_config_table_cmp(const grpc_method_config_table* table1, + const grpc_method_config_table* table2) { + return grpc_mdstr_hash_table_cmp(table1, table2); +} + +void* grpc_method_config_table_get(const grpc_mdstr_hash_table* table, + const grpc_mdstr* path) { + void* value = grpc_mdstr_hash_table_get(table, path); + // If we didn't find a match for the path, try looking for a wildcard + // entry (i.e., change "/service/method" to "/service/*"). + if (value == NULL) { + const char* path_str = grpc_mdstr_as_c_string(path); + const char* sep = strrchr(path_str, '/') + 1; + const size_t len = (size_t)(sep - path_str); + char* buf = gpr_malloc(len + 2); // '*' and NUL + memcpy(buf, path_str, len); + buf[len] = '*'; + buf[len + 1] = '\0'; + grpc_mdstr* wildcard_path = grpc_mdstr_from_string(buf); + gpr_free(buf); + value = grpc_mdstr_hash_table_get(table, wildcard_path); + GRPC_MDSTR_UNREF(wildcard_path); + } + return value; +} + +static void* copy_arg(void* p) { return grpc_method_config_table_ref(p); } + +static void destroy_arg(void* p) { grpc_method_config_table_unref(p); } + +static int cmp_arg(void* p1, void* p2) { + return grpc_method_config_table_cmp(p1, p2); +} + +static grpc_arg_pointer_vtable arg_vtable = {copy_arg, destroy_arg, cmp_arg}; + +grpc_arg grpc_method_config_table_create_channel_arg( + grpc_method_config_table* table) { + grpc_arg arg; + arg.type = GRPC_ARG_POINTER; + arg.key = GRPC_ARG_SERVICE_CONFIG; + arg.value.pointer.p = table; + arg.value.pointer.vtable = &arg_vtable; + return arg; +} + +// State used by convert_entry() below. +typedef struct conversion_state { + void* (*convert_value)(const grpc_method_config* method_config); + const grpc_mdstr_hash_table_vtable* vtable; + size_t num_entries; + grpc_mdstr_hash_table_entry* entries; +} conversion_state; + +// A function to be passed to grpc_mdstr_hash_table_iterate() to create +// a copy of the entries. +static void convert_entry(const grpc_mdstr_hash_table_entry* entry, + void* user_data) { + conversion_state* state = user_data; + state->entries[state->num_entries].key = GRPC_MDSTR_REF(entry->key); + state->entries[state->num_entries].value = state->convert_value(entry->value); + state->entries[state->num_entries].vtable = state->vtable; + ++state->num_entries; +} + +grpc_mdstr_hash_table* grpc_method_config_table_convert( + const grpc_method_config_table* table, + void* (*convert_value)(const grpc_method_config* method_config), + const grpc_mdstr_hash_table_vtable* vtable) { + // Create an array of the entries in the table with converted values. + conversion_state state; + state.convert_value = convert_value; + state.vtable = vtable; + state.num_entries = 0; + state.entries = gpr_malloc(sizeof(grpc_mdstr_hash_table_entry) * + grpc_mdstr_hash_table_num_entries(table)); + grpc_mdstr_hash_table_iterate(table, convert_entry, &state); + // Create a new table based on the array we just constructed. + grpc_mdstr_hash_table* new_table = + grpc_mdstr_hash_table_create(state.num_entries, state.entries); + // Clean up the array. + for (size_t i = 0; i < state.num_entries; ++i) { + GRPC_MDSTR_UNREF(state.entries[i].key); + vtable->destroy_value(state.entries[i].value); + } + gpr_free(state.entries); + // Return the new table. + return new_table; +} |