reorganize directories

[m6w6/libmemcached] / src / libmemcached / flush.cc

diff --git a/src/libmemcached/flush.cc b/src/libmemcached/flush.cc
new file mode 100644 (file)
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--- /dev/null
+++ b/src/libmemcached/flush.cc
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+/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ * 
+ *  Libmemcached library
+ *
+ *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *      * Redistributions of source code must retain the above copyright
+ *  notice, this list of conditions and the following disclaimer.
+ *
+ *      * Redistributions in binary form must reproduce the above
+ *  copyright notice, this list of conditions and the following disclaimer
+ *  in the documentation and/or other materials provided with the
+ *  distribution.
+ *
+ *      * The names of its contributors may not be used to endorse or
+ *  promote products derived from this software without specific prior
+ *  written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <libmemcached/common.h>
+
+static memcached_return_t memcached_flush_binary(Memcached *ptr, 
+                                                 time_t expiration,
+                                                 const bool reply)
+{
+  protocol_binary_request_flush request= {};
+
+  request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
+  request.message.header.request.extlen= 4;
+  request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
+  request.message.header.request.bodylen= htonl(request.message.header.request.extlen);
+  request.message.body.expiration= htonl((uint32_t) expiration);
+
+  memcached_return_t rc= MEMCACHED_SUCCESS;
+
+  for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
+  {
+    memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
+    initialize_binary_request(instance, request.message.header);
+
+    if (reply)
+    {
+      request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
+    }
+    else
+    {
+      request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSHQ;
+    }
+
+    libmemcached_io_vector_st vector[]=
+    {
+      { NULL, 0 },
+      { request.bytes, sizeof(request.bytes) }
+    };
+
+    memcached_return_t rrc;
+    if (memcached_failed(rrc= memcached_vdo(instance, vector, 2, true)))
+    {
+      if (instance->error_messages == NULL or instance->root->error_messages == NULL)
+      {
+        memcached_set_error(*instance, rrc, MEMCACHED_AT);
+      }
+      rc= MEMCACHED_SOME_ERRORS;
+    } 
+  }
+
+  for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
+  {
+    memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
+
+    if (instance->response_count() > 0)
+    {
+      (void)memcached_response(instance, NULL, 0, NULL);
+    }
+  }
+
+  return rc;
+}
+
+static memcached_return_t memcached_flush_textual(Memcached *ptr, 
+                                                  time_t expiration,
+                                                  const bool reply)
+{
+  char buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
+  int send_length= 0;
+  if (expiration)
+  {
+    send_length= snprintf(buffer, sizeof(buffer), "%llu", (unsigned long long)expiration);
+  }
+
+  if (size_t(send_length) >= sizeof(buffer) or send_length < 0)
+  {
+    return memcached_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT, 
+                               memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
+  }
+
+  memcached_return_t rc= MEMCACHED_SUCCESS;
+  for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
+  {
+    memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
+
+    libmemcached_io_vector_st vector[]=
+    {
+      { NULL, 0 },
+      { memcached_literal_param("flush_all ") },
+      { buffer, size_t(send_length) },
+      { " noreply", reply ? 0 : memcached_literal_param_size(" noreply") },
+      { memcached_literal_param("\r\n") }
+    };
+
+    memcached_return_t rrc= memcached_vdo(instance, vector, 5, true);
+    if (memcached_success(rrc) and reply == true)
+    {
+      char response_buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
+      rrc= memcached_response(instance, response_buffer, sizeof(response_buffer), NULL);
+    }
+
+    if (memcached_failed(rrc))
+    {
+      // If an error has already been reported, then don't add to it
+      if (instance->error_messages == NULL or instance->root->error_messages == NULL)
+      {
+        memcached_set_error(*instance, rrc, MEMCACHED_AT);
+      }
+      rc= MEMCACHED_SOME_ERRORS;
+    }
+  }
+
+  return rc;
+}
+
+memcached_return_t memcached_flush(memcached_st *shell, time_t expiration)
+{
+  Memcached* ptr= memcached2Memcached(shell);
+  memcached_return_t rc;
+  if (memcached_failed(rc= initialize_query(ptr, true)))
+  {
+    return rc;
+  }
+
+  bool reply= memcached_is_replying(ptr);
+
+  LIBMEMCACHED_MEMCACHED_FLUSH_START();
+  if (memcached_is_binary(ptr))
+  {
+    rc= memcached_flush_binary(ptr, expiration, reply);
+  }
+  else
+  {
+    rc= memcached_flush_textual(ptr, expiration, reply);
+  }
+  LIBMEMCACHED_MEMCACHED_FLUSH_END();
+
+  return rc;
+}