-#include <assert.h>
-
#include "common.h"
#include "memcached_io.h"
+#include "memcached_constants.h"
-void memcached_purge(memcached_server_st *ptr)
+memcached_return memcached_purge(memcached_server_st *ptr)
{
- int32_t timeout;
- char buffer[2048];
- size_t buffer_length= sizeof(buffer);
- memcached_result_st result;
+ 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) < 10))
+ (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;
+ 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.. */
- memcached_io_write(ptr, NULL, 0, 1);
-
- /* we have already incremented the response counter, and memcached_response
- will read out all messages.. To avoid memcached_response to wait forever
- for a response to a command I have in my buffer, let's decrement the
- response counter :) */
- memcached_server_response_decrement(ptr);
-
- /* memcached_response may call memcached_io_read, but let's use a short
- timeout if there is no data yet */
- timeout= ptr->root->poll_timeout;
- ptr->root->poll_timeout= 1;
- memcached_response(ptr, buffer, sizeof(buffer), &result);
- ptr->root->poll_timeout= timeout;
- memcached_server_response_increment(ptr);
- ptr->root->purging = 0;
+ 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
+ */
+ int32_t 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);
+ }
+
+ if (ptr->root->callbacks != NULL)
+ {
+ memcached_callback_st cb = *ptr->root->callbacks;
+ if (rc == MEMCACHED_SUCCESS)
+ {
+ for (unsigned int y = 0; y < cb.number_of_callback; y++)
+ {
+ rc = (*cb.callback[y])(ptr->root, result_ptr, cb.context);
+ if (rc != MEMCACHED_SUCCESS)
+ break;
+ }
+ }
+ }
+ }
+
+ memcached_result_free(result_ptr);
+ ptr->root->poll_timeout= timeo;
+ }
+ ptr->root->purging= 0;
+
+ return ret;
}