#include <libmemcached/common.h>
-memcached_return_t memcached_do(memcached_server_write_instance_st ptr, const void *command,
- size_t command_length, bool with_flush)
+memcached_return_t memcached_vdo(memcached_server_write_instance_st instance,
+ libmemcached_io_vector_st vector[],
+ const size_t count,
+ const bool with_flush)
{
- assert_msg(command_length, "Programming error, somehow a command had a length of zero");
- assert_msg(command, "Programming error, somehow a command was NULL");
-
memcached_return_t rc;
- if (memcached_failed(rc= memcached_connect(ptr)))
+
+ assert_msg(vector, "Invalid vector passed");
+
+ if (memcached_failed(rc= memcached_connect(instance)))
{
- WATCHPOINT_ASSERT(rc == memcached_last_error(ptr->root));
WATCHPOINT_ERROR(rc);
+ assert_msg(instance->error_messages, "memcached_connect() returned an error but the memcached_server_write_instance_st showed none.");
return rc;
}
** before they start writing, if there is any data in buffer, clear it out,
** otherwise we might get a partial write.
**/
- if (ptr->type == MEMCACHED_CONNECTION_UDP && with_flush && ptr->write_buffer_offset > UDP_DATAGRAM_HEADER_LENGTH)
- {
- memcached_io_write(ptr, NULL, 0, true);
- }
-
- ssize_t sent_length= memcached_io_write(ptr, command, command_length, with_flush);
-
- if (sent_length == -1 or size_t(sent_length) != command_length)
+ if (memcached_is_udp(instance->root))
{
- rc= MEMCACHED_WRITE_FAILURE;
- }
- else if ((ptr->root->flags.no_reply) == 0)
- {
- memcached_server_response_increment(ptr);
- }
+ if (vector[0].buffer or vector[0].length)
+ {
+ return memcached_set_error(*instance->root, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT,
+ memcached_literal_param("UDP messages was attempted, but vector was not setup for it"));
+ }
- return rc;
-}
-
-memcached_return_t memcached_vdo(memcached_server_write_instance_st ptr,
- const struct libmemcached_io_vector_st *vector, size_t count,
- bool with_flush)
-{
- memcached_return_t rc;
+ struct msghdr msg;
+ memset(&msg, 0, sizeof(msg));
- WATCHPOINT_ASSERT(count);
- WATCHPOINT_ASSERT(vector);
+ increment_udp_message_id(instance);
+ vector[0].buffer= instance->write_buffer;
+ vector[0].length= UDP_DATAGRAM_HEADER_LENGTH;
- if (memcached_failed(rc= memcached_connect(ptr)))
- {
- WATCHPOINT_ERROR(rc);
- assert_msg(ptr->error_messages, "memcached_connect() returned an error but the memcached_server_write_instance_st showed none.");
- return rc;
- }
+ msg.msg_iov= (struct iovec*)vector;
+ msg.msg_iovlen= count;
- /*
- ** Since non buffering ops in UDP mode dont check to make sure they will fit
- ** before they start writing, if there is any data in buffer, clear it out,
- ** otherwise we might get a partial write.
- **/
- if (ptr->type == MEMCACHED_CONNECTION_UDP && with_flush && ptr->write_buffer_offset > UDP_DATAGRAM_HEADER_LENGTH)
- {
- memcached_io_write(ptr, NULL, 0, true);
- }
+ uint32_t retry= 5;
+ while (--retry)
+ {
+ ssize_t sendmsg_length= ::sendmsg(instance->fd, &msg, 0);
+ if (sendmsg_length > 0)
+ {
+ break;
+ }
+ else if (sendmsg_length < 0)
+ {
+ if (errno == EMSGSIZE)
+ {
+ return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
+ }
- ssize_t sent_length= memcached_io_writev(ptr, vector, count, with_flush);
+ return memcached_set_errno(*instance, errno, MEMCACHED_AT);
+ }
+ }
- size_t command_length= 0;
- for (uint32_t x= 0; x < count; ++x, vector++)
- {
- command_length+= vector->length;
+ return MEMCACHED_SUCCESS;
}
- if (sent_length == -1 or size_t(sent_length) != command_length)
+ bool sent_success= memcached_io_writev(instance, vector, count, with_flush);
+ if (sent_success == false)
{
- rc= MEMCACHED_WRITE_FAILURE;
- WATCHPOINT_ERROR(rc);
- WATCHPOINT_ERRNO(errno);
+ if (memcached_last_error(instance->root) == MEMCACHED_SUCCESS)
+ {
+ return memcached_set_error(*instance, MEMCACHED_WRITE_FAILURE, MEMCACHED_AT);
+ }
+ else
+ {
+ rc= MEMCACHED_WRITE_FAILURE;
+ }
}
- else if ((ptr->root->flags.no_reply) == 0)
+ else if (memcached_is_replying(instance->root))
{
- memcached_server_response_increment(ptr);
+ memcached_server_response_increment(instance);
}
return rc;