#include "common.h"
#include "memcached_io.h"
#include "memcached_constants.h"
memcached_return memcached_purge(memcached_server_st *ptr)
{
uint32_t x;
memcached_return ret= MEMCACHED_SUCCESS;
if (ptr->root->purging || /* already purging */
(memcached_server_response_count(ptr) < ptr->root->io_msg_watermark &&
ptr->io_bytes_sent < ptr->root->io_bytes_watermark) ||
(ptr->io_bytes_sent > ptr->root->io_bytes_watermark &&
memcached_server_response_count(ptr) < 2))
{
return MEMCACHED_SUCCESS;
}
/* memcached_io_write and memcached_response may call memcached_purge
so we need to be able stop any recursion.. */
ptr->root->purging= 1;
WATCHPOINT_ASSERT(ptr->fd != -1);
/* Force a flush of the buffer to ensure that we don't have the n-1 pending
requests buffered up.. */
if (memcached_io_write(ptr, NULL, 0, 1) == -1)
{
ptr->root->purging= 0;
return MEMCACHED_WRITE_FAILURE;
}
WATCHPOINT_ASSERT(ptr->fd != -1);
uint32_t no_msg= memcached_server_response_count(ptr) - 1;
if (no_msg > 0)
{
memcached_result_st result;
memcached_result_st *result_ptr;
char buffer[SMALL_STRING_LEN];
/*
* We need to increase the timeout, because we might be waiting for
* data to be sent from the server (the commands was in the output buffer
* and just flushed
*/
long timeo= ptr->root->poll_timeout;
ptr->root->poll_timeout= 2000;
result_ptr= memcached_result_create(ptr->root, &result);
WATCHPOINT_ASSERT(result_ptr);
for (x= 0; x < no_msg; x++)
{
memcached_result_reset(result_ptr);
memcached_return rc= memcached_read_one_response(ptr, buffer,
sizeof (buffer),
result_ptr);
/*
* Purge doesn't care for what kind of command results that is received.
* The only kind of errors I care about if is I'm out of sync with the
* protocol or have problems reading data from the network..
*/
if (rc== MEMCACHED_PROTOCOL_ERROR || rc == MEMCACHED_UNKNOWN_READ_FAILURE)
{
WATCHPOINT_ERROR(rc);
ret = rc;
memcached_io_reset(ptr);
}
}
memcached_result_free(result_ptr);
ptr->root->poll_timeout=timeo;
}
ptr->root->purging= 0;
return ret;
}