memcached_result_st *memcached_result_create(const memcached_st *memc,
memcached_result_st *ptr)
{
WATCHPOINT_ASSERT(memc);
/* Saving malloc calls :) */
if (ptr)
{
ptr->options.is_allocated= false;
}
else
{
ptr= libmemcached_malloc(memc, sizeof(memcached_result_st));
if (ptr == NULL)
return NULL;
ptr->options.is_allocated= true;
}
ptr->options.is_initialized= true;
_result_init(ptr, memc);
ptr->root= memc;
WATCHPOINT_SET(ptr->value.options.is_initialized= false);
memcached_string_create(memc, &ptr->value, 0);
WATCHPOINT_ASSERT_INITIALIZED(&ptr->value);
WATCHPOINT_ASSERT(ptr->value.string == NULL);
return ptr;
}
static inline memcached_return_t memcached_send(memcached_st *ptr,
const char *master_key, size_t master_key_length,
const char *key, size_t key_length,
const char *value, size_t value_length,
time_t expiration,
uint32_t flags,
uint64_t cas,
uint16_t vbucketid,
memcached_storage_action_t verb)
{
bool to_write;
size_t write_length;
memcached_return_t rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
uint32_t server_key;
memcached_server_write_instance_st instance;
WATCHPOINT_ASSERT(!(value == NULL && value_length > 0));
rc= memcached_validate_key_length(key_length, ptr->flags.binary_protocol);
unlikely (rc != MEMCACHED_SUCCESS)
return rc;
unlikely (memcached_server_count(ptr) == 0)
return MEMCACHED_NO_SERVERS;
if (ptr->flags.verify_key && (memcached_key_test((const char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
return MEMCACHED_BAD_KEY_PROVIDED;
server_key= memcached_generate_hash_with_redistribution(ptr, master_key, master_key_length);
instance= memcached_server_instance_fetch(ptr, server_key);
instance->read_buffer_length = 0;
WATCHPOINT_SET(instance->io_wait_count.read= 0);
WATCHPOINT_SET(instance->io_wait_count.write= 0);
if (ptr->flags.binary_protocol)
{
rc= memcached_send_binary(ptr, instance, server_key,
key, key_length,
value, value_length, expiration,
flags, cas, vbucketid, verb);
WATCHPOINT_IF_LABELED_NUMBER(instance->io_wait_count.read > 2, "read IO_WAIT", instance->io_wait_count.read);
WATCHPOINT_IF_LABELED_NUMBER(instance->io_wait_count.write > 2, "write_IO_WAIT", instance->io_wait_count.write);
}
else
{
if (cas)
{
int check_length;
check_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"%s %.*s%.*s %u %llu %lu %llu%s\r\n",
storage_op_string(verb),
(int)ptr->prefix_key_length,
ptr->prefix_key,
(int)key_length, key, flags,
(unsigned long long)expiration, (unsigned long)value_length,
(unsigned long long)cas,
(ptr->flags.no_reply) ? " noreply" : "");
if (check_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || check_length < 0)
{
rc= MEMCACHED_WRITE_FAILURE;
memcached_io_reset(instance);
return rc;
}
write_length= check_length;
}
else
{
char *buffer_ptr= buffer;
const char *command= storage_op_string(verb);
/* Copy in the command, no space needed, we handle that in the command function*/
memcpy(buffer_ptr, command, strlen(command));
/* Copy in the key prefix, switch to the buffer_ptr */
buffer_ptr= memcpy((buffer_ptr + strlen(command)), ptr->prefix_key, ptr->prefix_key_length);
/* Copy in the key, adjust point if a key prefix was used. */
buffer_ptr= memcpy(buffer_ptr + (ptr->prefix_key_length ? ptr->prefix_key_length : 0),
key, key_length);
buffer_ptr+= key_length;
buffer_ptr[0]= ' ';
buffer_ptr++;
write_length= (size_t)(buffer_ptr - buffer);
int check_length;
check_length= snprintf(buffer_ptr, MEMCACHED_DEFAULT_COMMAND_SIZE -(size_t)(buffer_ptr - buffer),
"%u %llu %lu%s\r\n",
flags,
(unsigned long long)expiration, (unsigned long)value_length,
ptr->flags.no_reply ? " noreply" : "");
if ((size_t)check_length >= MEMCACHED_DEFAULT_COMMAND_SIZE -(size_t)(buffer_ptr - buffer) || check_length < 0)
{
rc= MEMCACHED_WRITE_FAILURE;
memcached_io_reset(instance);
return rc;
}
write_length+= (size_t)check_length;
WATCHPOINT_ASSERT(write_length < MEMCACHED_DEFAULT_COMMAND_SIZE);
}
if (ptr->flags.use_udp && ptr->flags.buffer_requests)
{
size_t cmd_size= write_length + value_length + 2;
if (cmd_size > MAX_UDP_DATAGRAM_LENGTH - UDP_DATAGRAM_HEADER_LENGTH)
return MEMCACHED_WRITE_FAILURE;
if (cmd_size + instance->write_buffer_offset > MAX_UDP_DATAGRAM_LENGTH)
memcached_io_write(instance, NULL, 0, true);
}
if (write_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
{
rc= MEMCACHED_WRITE_FAILURE;
}
else
{
struct libmemcached_io_vector_st vector[]=
{
{ .length= write_length, .buffer= buffer },
{ .length= value_length, .buffer= value },
{ .length= 2, .buffer= "\r\n" }
};