/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Libmemcached library
*
* Copyright (C) 2011 Data Differential, http://datadifferential.com/
*
* 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 memcached_return_t memcached_flush_binary(Memcached *ptr,
time_t expiration,
const bool reply)
{
protocol_binary_request_flush request= {};
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
request.message.header.request.extlen= 4;
request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
request.message.header.request.bodylen= htonl(request.message.header.request.extlen);
request.message.body.expiration= htonl((uint32_t) expiration);
memcached_return_t rc= MEMCACHED_SUCCESS;
for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
{
memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
initialize_binary_request(instance, request.message.header);
if (reply)
{
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
}
else
{
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSHQ;
}
libmemcached_io_vector_st vector[]=
{
{ NULL, 0 },
{ request.bytes, sizeof(request.bytes) }
};
memcached_return_t rrc;
if (memcached_failed(rrc= memcached_vdo(instance, vector, 2, true)))
{
if (instance->error_messages == NULL or instance->root->error_messages == NULL)
{
memcached_set_error(*instance, rrc, MEMCACHED_AT);
}
memcached_io_reset(instance);
rc= MEMCACHED_SOME_ERRORS;
}
}
for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
{
memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
if (instance->response_count() > 0)
{
(void)memcached_response(instance, NULL, 0, NULL);
}
}
return rc;
}
static memcached_return_t memcached_flush_textual(Memcached *ptr,
time_t expiration,
const bool reply)
{
char buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
int send_length= 0;
if (expiration)
{
send_length= snprintf(buffer, sizeof(buffer), "%llu", (unsigned long long)expiration);
}
if (size_t(send_length) >= sizeof(buffer) or send_length < 0)
{
return memcached_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
}
memcached_return_t rc= MEMCACHED_SUCCESS;
for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
{
memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
libmemcached_io_vector_st vector[]=
{
{ NULL, 0 },
{ memcached_literal_param("flush_all ") },
{ buffer, size_t(send_length) },
{ " noreply", reply ? 0 : memcached_literal_param_size(" noreply") },
{ memcached_literal_param("\r\n") }
};
memcached_return_t rrc= memcached_vdo(instance, vector, 5, true);
if (memcached_success(rrc) and reply == true)
{
char response_buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
rrc= memcached_response(instance, response_buffer, sizeof(response_buffer), NULL);
}
if (memcached_failed(rrc))
{
// If an error has already been reported, then don't add to it
if (instance->error_messages == NULL or instance->root->error_messages == NULL)
{
memcached_set_error(*instance, rrc, MEMCACHED_AT);
}
rc= MEMCACHED_SOME_ERRORS;
}
}
return rc;
}
memcached_return_t memcached_flush(memcached_st *shell, time_t expiration)
{
Memcached* ptr= memcached2Memcached(shell);
memcached_return_t rc;
if (memcached_failed(rc= initialize_query(ptr, true)))
{
return rc;
}
bool reply= memcached_is_replying(ptr);
LIBMEMCACHED_MEMCACHED_FLUSH_START();
if (memcached_is_binary(ptr))
{
rc= memcached_flush_binary(ptr, expiration, reply);
}
else
{
rc= memcached_flush_textual(ptr, expiration, reply);
}
LIBMEMCACHED_MEMCACHED_FLUSH_END();
return rc;
}