+++ /dev/null
-/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
- *
- * Libmemcached library
- *
- * Copyright (C) 2011 Data Differential, http://datadifferential.com/
- * Copyright (C) 2006-2009 Brian Aker 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.
- *
- * * The names of its contributors may not 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 <libmemcached/common.h>
-
-static void auto_response(memcached_instance_st* instance, const bool reply, memcached_return_t& rc, uint64_t* value)
-{
- // If the message was successfully sent, then get the response, otherwise
- // fail.
- if (memcached_success(rc))
- {
- if (reply == false)
- {
- *value= UINT64_MAX;
- return;
- }
-
- rc= memcached_response(instance, &instance->root->result);
- }
-
- if (memcached_fatal(rc))
- {
- assert(memcached_last_error(instance->root) != MEMCACHED_SUCCESS);
- *value= UINT64_MAX;
- }
- else if (memcached_failed(rc))
- {
- *value= UINT64_MAX;
- }
- else
- {
- assert(memcached_last_error(instance->root) != MEMCACHED_NOTFOUND);
- *value= instance->root->result.numeric_value;
- }
-}
-
-static memcached_return_t text_incr_decr(memcached_instance_st* instance,
- const bool is_incr,
- const char *key, size_t key_length,
- const uint64_t offset,
- const bool reply)
-{
- char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
-
- int send_length= snprintf(buffer, sizeof(buffer), " %" PRIu64, offset);
- if (size_t(send_length) >= sizeof(buffer) or send_length < 0)
- {
- return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
- memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
- }
-
- libmemcached_io_vector_st vector[]=
- {
- { NULL, 0 },
- { memcached_literal_param("incr ") },
- { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
- { key, key_length },
- { buffer, size_t(send_length) },
- { " noreply", reply ? 0 : memcached_literal_param_size(" noreply") },
- { memcached_literal_param("\r\n") }
- };
-
- if (is_incr == false)
- {
- vector[1].buffer= "decr ";
- }
-
- return memcached_vdo(instance, vector, 7, true);
-}
-
-static memcached_return_t binary_incr_decr(memcached_instance_st* instance,
- protocol_binary_command cmd,
- const char *key, const size_t key_length,
- const uint64_t offset,
- const uint64_t initial,
- const uint32_t expiration,
- const bool reply)
-{
- if (reply == false)
- {
- if(cmd == PROTOCOL_BINARY_CMD_DECREMENT)
- {
- cmd= PROTOCOL_BINARY_CMD_DECREMENTQ;
- }
-
- if(cmd == PROTOCOL_BINARY_CMD_INCREMENT)
- {
- cmd= PROTOCOL_BINARY_CMD_INCREMENTQ;
- }
- }
- protocol_binary_request_incr request= {}; // = {.bytes= {0}};
-
- initialize_binary_request(instance, request.message.header);
-
- request.message.header.request.opcode= cmd;
- request.message.header.request.keylen= htons((uint16_t)(key_length + memcached_array_size(instance->root->_namespace)));
- request.message.header.request.extlen= 20;
- request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
- request.message.header.request.bodylen= htonl((uint32_t)(key_length + memcached_array_size(instance->root->_namespace) +request.message.header.request.extlen));
- request.message.body.delta= memcached_htonll(offset);
- request.message.body.initial= memcached_htonll(initial);
- request.message.body.expiration= htonl((uint32_t) expiration);
-
- libmemcached_io_vector_st vector[]=
- {
- { NULL, 0 },
- { request.bytes, sizeof(request.bytes) },
- { memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
- { key, key_length }
- };
-
- return memcached_vdo(instance, vector, 4, true);
-}
-
-memcached_return_t memcached_increment(memcached_st *memc,
- const char *key, size_t key_length,
- uint32_t offset,
- uint64_t *value)
-{
- return memcached_increment_by_key(memc, key, key_length, key, key_length, offset, value);
-}
-
-static memcached_return_t increment_decrement_by_key(const protocol_binary_command command,
- Memcached *memc,
- const char *group_key, size_t group_key_length,
- const char *key, size_t key_length,
- uint64_t offset,
- uint64_t *value)
-{
- uint64_t local_value;
- if (value == NULL)
- {
- value= &local_value;
- }
-
- memcached_return_t rc;
- if (memcached_failed(rc= initialize_query(memc, true)))
- {
- return rc;
- }
-
- if (memcached_is_encrypted(memc))
- {
- return memcached_set_error(*memc, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT,
- memcached_literal_param("Operation not allowed while encyrption is enabled"));
- }
-
- if (memcached_failed(rc= memcached_key_test(*memc, (const char **)&key, &key_length, 1)))
- {
- return memcached_last_error(memc);
- }
-
- uint32_t server_key= memcached_generate_hash_with_redistribution(memc, group_key, group_key_length);
- memcached_instance_st* instance= memcached_instance_fetch(memc, server_key);
-
- bool reply= memcached_is_replying(instance->root);
-
- if (memcached_is_binary(memc))
- {
- rc= binary_incr_decr(instance, command,
- key, key_length,
- uint64_t(offset), 0, MEMCACHED_EXPIRATION_NOT_ADD,
- reply);
- }
- else
- {
- rc= text_incr_decr(instance,
- command == PROTOCOL_BINARY_CMD_INCREMENT ? true : false,
- key, key_length,
- offset, reply);
- }
-
- auto_response(instance, reply, rc, value);
-
- return rc;
-}
-
-static memcached_return_t increment_decrement_with_initial_by_key(const protocol_binary_command command,
- Memcached *memc,
- const char *group_key,
- size_t group_key_length,
- const char *key,
- size_t key_length,
- uint64_t offset,
- uint64_t initial,
- time_t expiration,
- uint64_t *value)
-{
- uint64_t local_value;
- if (value == NULL)
- {
- value= &local_value;
- }
-
- memcached_return_t rc;
- if (memcached_failed(rc= initialize_query(memc, true)))
- {
- return rc;
- }
-
- if (memcached_is_encrypted(memc))
- {
- return memcached_set_error(*memc, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT,
- memcached_literal_param("Operation not allowed while encryption is enabled"));
- }
-
- if (memcached_failed(rc= memcached_key_test(*memc, (const char **)&key, &key_length, 1)))
- {
- return memcached_last_error(memc);
- }
-
- uint32_t server_key= memcached_generate_hash_with_redistribution(memc, group_key, group_key_length);
- memcached_instance_st* instance= memcached_instance_fetch(memc, server_key);
-
- bool reply= memcached_is_replying(instance->root);
-
- if (memcached_is_binary(memc))
- {
- rc= binary_incr_decr(instance, command,
- key, key_length,
- offset, initial, uint32_t(expiration),
- reply);
-
- }
- else
- {
- rc= memcached_set_error(*memc, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT,
- memcached_literal_param("memcached_increment_with_initial_by_key() is not supported via the ASCII protocol"));
- }
-
- auto_response(instance, reply, rc, value);
-
- return rc;
-}
-
-memcached_return_t memcached_decrement(memcached_st *memc,
- const char *key, size_t key_length,
- uint32_t offset,
- uint64_t *value)
-{
- return memcached_decrement_by_key(memc, key, key_length, key, key_length, offset, value);
-}
-
-
-memcached_return_t memcached_increment_by_key(memcached_st *shell,
- const char *group_key, size_t group_key_length,
- const char *key, size_t key_length,
- uint64_t offset,
- uint64_t *value)
-{
- Memcached* memc= memcached2Memcached(shell);
- LIBMEMCACHED_MEMCACHED_INCREMENT_START();
- memcached_return_t rc= increment_decrement_by_key(PROTOCOL_BINARY_CMD_INCREMENT,
- memc,
- group_key, group_key_length,
- key, key_length,
- offset, value);
-
- LIBMEMCACHED_MEMCACHED_INCREMENT_END();
-
- return rc;
-}
-
-memcached_return_t memcached_decrement_by_key(memcached_st *shell,
- const char *group_key, size_t group_key_length,
- const char *key, size_t key_length,
- uint64_t offset,
- uint64_t *value)
-{
- Memcached* memc= memcached2Memcached(shell);
- LIBMEMCACHED_MEMCACHED_DECREMENT_START();
- memcached_return_t rc= increment_decrement_by_key(PROTOCOL_BINARY_CMD_DECREMENT,
- memc,
- group_key, group_key_length,
- key, key_length,
- offset, value);
- LIBMEMCACHED_MEMCACHED_DECREMENT_END();
-
- return rc;
-}
-
-memcached_return_t memcached_increment_with_initial(memcached_st *memc,
- const char *key,
- size_t key_length,
- uint64_t offset,
- uint64_t initial,
- time_t expiration,
- uint64_t *value)
-{
- return memcached_increment_with_initial_by_key(memc, key, key_length,
- key, key_length,
- offset, initial, expiration, value);
-}
-
-memcached_return_t memcached_increment_with_initial_by_key(memcached_st *shell,
- const char *group_key,
- size_t group_key_length,
- const char *key,
- size_t key_length,
- uint64_t offset,
- uint64_t initial,
- time_t expiration,
- uint64_t *value)
-{
- LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_START();
- Memcached* memc= memcached2Memcached(shell);
- memcached_return_t rc= increment_decrement_with_initial_by_key(PROTOCOL_BINARY_CMD_INCREMENT,
- memc,
- group_key, group_key_length,
- key, key_length,
- offset, initial, expiration, value);
- LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_END();
-
- return rc;
-}
-
-memcached_return_t memcached_decrement_with_initial(memcached_st *memc,
- const char *key,
- size_t key_length,
- uint64_t offset,
- uint64_t initial,
- time_t expiration,
- uint64_t *value)
-{
- return memcached_decrement_with_initial_by_key(memc, key, key_length,
- key, key_length,
- offset, initial, expiration, value);
-}
-
-memcached_return_t memcached_decrement_with_initial_by_key(memcached_st *shell,
- const char *group_key,
- size_t group_key_length,
- const char *key,
- size_t key_length,
- uint64_t offset,
- uint64_t initial,
- time_t expiration,
- uint64_t *value)
-{
- LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_START();
- Memcached* memc= memcached2Memcached(shell);
- memcached_return_t rc= increment_decrement_with_initial_by_key(PROTOCOL_BINARY_CMD_DECREMENT,
- memc,
- group_key, group_key_length,
- key, key_length,
- offset, initial, expiration, value);
-
- LIBMEMCACHED_MEMCACHED_INCREMENT_WITH_INITIAL_END();
-
- return rc;
-}
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