git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/flush.c

   1 #include "common.h"
   2
   3 static memcached_return_t memcached_flush_binary(memcached_st *ptr,
   4                                                  time_t expiration);
   5 static memcached_return_t memcached_flush_textual(memcached_st *ptr,
   6                                                   time_t expiration);
   7
   8 memcached_return_t memcached_flush(memcached_st *ptr, time_t expiration)
   9 {
  10   memcached_return_t rc;
  11   if ((rc= initialize_query(ptr)) != MEMCACHED_SUCCESS)
  12   {
  13     return rc;
  14   }
  15
  16   LIBMEMCACHED_MEMCACHED_FLUSH_START();
  17   if (ptr->flags.binary_protocol)
  18     rc= memcached_flush_binary(ptr, expiration);
  19   else
  20     rc= memcached_flush_textual(ptr, expiration);
  21   LIBMEMCACHED_MEMCACHED_FLUSH_END();
  22   return rc;
  23 }
  24
  25 static memcached_return_t memcached_flush_textual(memcached_st *ptr,
  26                                                   time_t expiration)
  27 {
  28   unlikely (memcached_server_count(ptr) == 0)
  29     return MEMCACHED_NO_SERVERS;
  30
  31   for (unsigned int x= 0; x < memcached_server_count(ptr); x++)
  32   {
  33     memcached_return_t rc;
  34     char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  35
  36     bool no_reply= ptr->flags.no_reply;
  37     memcached_server_write_instance_st instance=
  38       memcached_server_instance_fetch(ptr, x);
  39
  40     int send_length;
  41     if (expiration)
  42     {
  43       send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  44                             "flush_all %llu%s\r\n",
  45                             (unsigned long long)expiration, no_reply ? " noreply" : "");
  46     }
  47     else
  48     {
  49       send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  50                             "flush_all%s\r\n", no_reply ? " noreply" : "");
  51     }
  52
  53     if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || send_length < 0)
  54     {
  55       return MEMCACHED_FAILURE;
  56     }
  57
  58     rc= memcached_do(instance, buffer, (size_t)send_length, true);
  59
  60     if (rc == MEMCACHED_SUCCESS && !no_reply)
  61       (void)memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
  62   }
  63
  64   return MEMCACHED_SUCCESS;
  65 }
  66
  67 static memcached_return_t memcached_flush_binary(memcached_st *ptr,
  68                                                  time_t expiration)
  69 {
  70   protocol_binary_request_flush request= {.bytes= {0}};
  71
  72   unlikely (memcached_server_count(ptr) == 0)
  73     return MEMCACHED_NO_SERVERS;
  74
  75   request.message.header.request.magic= (uint8_t)PROTOCOL_BINARY_REQ;
  76   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
  77   request.message.header.request.extlen= 4;
  78   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
  79   request.message.header.request.bodylen= htonl(request.message.header.request.extlen);
  80   request.message.body.expiration= htonl((uint32_t) expiration);
  81
  82   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
  83   {
  84     memcached_server_write_instance_st instance=
  85       memcached_server_instance_fetch(ptr, x);
  86
  87     if (ptr->flags.no_reply)
  88     {
  89       request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSHQ;
  90     }
  91     else
  92     {
  93       request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
  94     }
  95
  96     if (memcached_do(instance, request.bytes, sizeof(request.bytes), true) != MEMCACHED_SUCCESS)
  97     {
  98       memcached_io_reset(instance);
  99       return MEMCACHED_WRITE_FAILURE;
 100     }
 101   }
 102
 103   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 104   {
 105     memcached_server_write_instance_st instance=
 106       memcached_server_instance_fetch(ptr, x);
 107
 108     if (memcached_server_response_count(instance) > 0)
 109       (void)memcached_response(instance, NULL, 0, NULL);
 110   }
 111
 112   return MEMCACHED_SUCCESS;
 113 }