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/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Libmemcached library
*
* Copyright (C) 2011 Data Differential, http://datadifferential.com/
* Copyright (C) 2010 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>
const char * memcached_lib_version(void)
{
return LIBMEMCACHED_VERSION_STRING;
}
static inline memcached_return_t memcached_version_textual(memcached_st *ptr)
{
libmemcached_io_vector_st vector[]=
{
{ memcached_literal_param("version\r\n") },
};
uint32_t success= 0;
bool errors_happened= false;
for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
{
memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
// Optimization, we only fetch version once.
if (instance->major_version != UINT8_MAX)
{
continue;
}
memcached_return_t rrc;
if (memcached_failed(rrc= memcached_vdo(instance, vector, 1, true)))
{
errors_happened= true;
(void)memcached_set_error(*instance, rrc, MEMCACHED_AT);
continue;
}
success++;
}
if (success)
{
// Collect the returned items
memcached_server_write_instance_st instance;
while ((instance= memcached_io_get_readable_server(ptr)))
{
memcached_return_t rrc= memcached_response(instance, NULL);
if (memcached_failed(rrc))
{
memcached_io_reset(instance);
errors_happened= true;
}
}
}
return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
}
static inline memcached_return_t memcached_version_binary(memcached_st *ptr)
{
protocol_binary_request_version request= {};
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
libmemcached_io_vector_st vector[]=
{
{ request.bytes, sizeof(request.bytes) }
};
uint32_t success= 0;
bool errors_happened= false;
for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
{
memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
initialize_binary_request(instance, request.message.header);
if (instance->major_version != UINT8_MAX)
{
continue;
}
memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
if (memcached_failed(rrc))
{
memcached_io_reset(instance);
errors_happened= true;
continue;
}
success++;
}
if (success)
{
// Collect the returned items
memcached_server_write_instance_st instance;
while ((instance= memcached_io_get_readable_server(ptr)))
{
char buffer[32];
memcached_return_t rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
if (memcached_failed(rrc))
{
memcached_io_reset(instance);
errors_happened= true;
}
}
}
return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
}
memcached_return_t memcached_version(memcached_st *ptr)
{
memcached_return_t rc;
if (memcached_failed(rc= initialize_query(ptr, true)))
{
return rc;
}
if (memcached_is_udp(ptr))
{
return MEMCACHED_NOT_SUPPORTED;
}
if (memcached_is_binary(ptr))
{
return memcached_version_binary(ptr);
}
return memcached_version_textual(ptr);
}
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