git.m6w6.name Git - m6w6/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
  12   LIBMEMCACHED_MEMCACHED_FLUSH_START();
  13   if (ptr->flags.binary_protocol)
  14     rc= memcached_flush_binary(ptr, expiration);
  15   else
  16     rc= memcached_flush_textual(ptr, expiration);
  17   LIBMEMCACHED_MEMCACHED_FLUSH_END();
  18   return rc;
  19 }
  20
  21 static memcached_return_t memcached_flush_textual(memcached_st *ptr,
  22                                                   time_t expiration)
  23 {
  24   unlikely (memcached_server_count(ptr) == 0)
  25     return MEMCACHED_NO_SERVERS;
  26
  27   for (unsigned int x= 0; x < memcached_server_count(ptr); x++)
  28   {
  29     memcached_return_t rc;
  30     char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  31
  32     bool no_reply= ptr->flags.no_reply;
  33     memcached_server_write_instance_st instance=
  34       memcached_server_instance_fetch(ptr, x);
  35
  36     int send_length;
  37     if (expiration)
  38     {
  39       send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  40                             "flush_all %llu%s\r\n",
  41                             (unsigned long long)expiration, no_reply ? " noreply" : "");
  42     }
  43     else
  44     {
  45       send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  46                             "flush_all%s\r\n", no_reply ? " noreply" : "");
  47     }
  48
  49     if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || send_length < 0)
  50     {
  51       return MEMCACHED_FAILURE;
  52     }
  53
  54     rc= memcached_do(instance, buffer, (size_t)send_length, true);
  55
  56     if (rc == MEMCACHED_SUCCESS && !no_reply)
  57       (void)memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
  58   }
  59
  60   return MEMCACHED_SUCCESS;
  61 }
  62
  63 static memcached_return_t memcached_flush_binary(memcached_st *ptr,
  64                                                  time_t expiration)
  65 {
  66   protocol_binary_request_flush request= {.bytes= {0}};
  67
  68   unlikely (memcached_server_count(ptr) == 0)
  69     return MEMCACHED_NO_SERVERS;
  70
  71   request.message.header.request.magic= (uint8_t)PROTOCOL_BINARY_REQ;
  72   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
  73   request.message.header.request.extlen= 4;
  74   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
  75   request.message.header.request.bodylen= htonl(request.message.header.request.extlen);
  76   request.message.body.expiration= htonl((uint32_t) expiration);
  77
  78   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
  79   {
  80     memcached_server_write_instance_st instance=
  81       memcached_server_instance_fetch(ptr, x);
  82
  83     if (ptr->flags.no_reply)
  84     {
  85       request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSHQ;
  86     }
  87     else
  88     {
  89       request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
  90     }
  91
  92     if (memcached_do(instance, request.bytes, sizeof(request.bytes), true) != MEMCACHED_SUCCESS)
  93     {
  94       memcached_io_reset(instance);
  95       return MEMCACHED_WRITE_FAILURE;
  96     }
  97   }
  98
  99   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 100   {
 101     memcached_server_write_instance_st instance=
 102       memcached_server_instance_fetch(ptr, x);
 103
 104     if (memcached_server_response_count(instance) > 0)
 105       (void)memcached_response(instance, NULL, 0, NULL);
 106   }
 107
 108   return MEMCACHED_SUCCESS;
 109 }