reoder functions in the order they are normally executed

net/http/http_cache_transaction.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file declares HttpCache::Transaction, a private class of HttpCache so
 // it should only be included by http_cache.cc
 
 #ifndef NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #define NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 
@@ skipping 152 matching lines @@
   // Helper struct to pair a header name with its value, for
   // headers used to validate cache entries.
   struct ValidationHeaders {
     ValidationHeaders() : initialized(false) {}
 
     std::string values[kNumValidationHeaders];
     bool initialized;
   };
 
   enum State {
+    // Normally, states are traversed in approximately this order.
     STATE_NONE,
     STATE_GET_BACKEND,
     STATE_GET_BACKEND_COMPLETE,
+    STATE_INIT_ENTRY,
+    STATE_OPEN_ENTRY,
+    STATE_OPEN_ENTRY_COMPLETE,
+    STATE_DOOM_ENTRY,
+    STATE_DOOM_ENTRY_COMPLETE,
+    STATE_CREATE_ENTRY,
+    STATE_CREATE_ENTRY_COMPLETE,
+    STATE_ADD_TO_ENTRY,
+    STATE_ADD_TO_ENTRY_COMPLETE,
+    STATE_CACHE_READ_RESPONSE,
+    STATE_CACHE_READ_RESPONSE_COMPLETE,
+    STATE_TOGGLE_UNUSED_SINCE_PREFETCH,
+    STATE_TOGGLE_UNUSED_SINCE_PREFETCH_COMPLETE,
+    STATE_CACHE_DISPATCH_VALIDATION,
+    STATE_CACHE_QUERY_DATA,
+    STATE_CACHE_QUERY_DATA_COMPLETE,
+    STATE_START_PARTIAL_CACHE_VALIDATION,
+    STATE_COMPLETE_PARTIAL_CACHE_VALIDATION,
     STATE_SEND_REQUEST,
     STATE_SEND_REQUEST_COMPLETE,
     STATE_SUCCESSFUL_SEND_REQUEST,
-    STATE_NETWORK_READ,
-    STATE_NETWORK_READ_COMPLETE,
-    STATE_INIT_ENTRY,
-    STATE_OPEN_ENTRY,
-    STATE_OPEN_ENTRY_COMPLETE,
-    STATE_CREATE_ENTRY,
-    STATE_CREATE_ENTRY_COMPLETE,
-    STATE_DOOM_ENTRY,
-    STATE_DOOM_ENTRY_COMPLETE,
-    STATE_ADD_TO_ENTRY,
-    STATE_ADD_TO_ENTRY_COMPLETE,
-    STATE_START_PARTIAL_CACHE_VALIDATION,
-    STATE_COMPLETE_PARTIAL_CACHE_VALIDATION,
     STATE_UPDATE_CACHED_RESPONSE,
     STATE_UPDATE_CACHED_RESPONSE_COMPLETE,
     STATE_OVERWRITE_CACHED_RESPONSE,
+    STATE_CACHE_WRITE_RESPONSE,
+    STATE_CACHE_WRITE_TRUNCATED_RESPONSE,
+    STATE_CACHE_WRITE_RESPONSE_COMPLETE,
     STATE_TRUNCATE_CACHED_DATA,
     STATE_TRUNCATE_CACHED_DATA_COMPLETE,
     STATE_TRUNCATE_CACHED_METADATA,
     STATE_TRUNCATE_CACHED_METADATA_COMPLETE,
     STATE_PARTIAL_HEADERS_RECEIVED,
-    STATE_CACHE_READ_RESPONSE,
-    STATE_CACHE_READ_RESPONSE_COMPLETE,
-    STATE_CACHE_DISPATCH_VALIDATION,
-    STATE_TOGGLE_UNUSED_SINCE_PREFETCH,
-    STATE_TOGGLE_UNUSED_SINCE_PREFETCH_COMPLETE,
-    STATE_CACHE_WRITE_RESPONSE,
-    STATE_CACHE_WRITE_TRUNCATED_RESPONSE,
-    STATE_CACHE_WRITE_RESPONSE_COMPLETE,
     STATE_CACHE_READ_METADATA,
     STATE_CACHE_READ_METADATA_COMPLETE,
-    STATE_CACHE_QUERY_DATA,
-    STATE_CACHE_QUERY_DATA_COMPLETE,
+
+    // These states are entered from Read/Write
+    STATE_NETWORK_READ,
+    STATE_NETWORK_READ_COMPLETE,
     STATE_CACHE_READ_DATA,
     STATE_CACHE_READ_DATA_COMPLETE,
     STATE_CACHE_WRITE_DATA,
     STATE_CACHE_WRITE_DATA_COMPLETE
   };
 
   // Used for categorizing transactions for reporting in histograms. Patterns
   // cover relatively common use cases being measured and considered for
   // optimization. Many use cases that are more complex or uncommon are binned
   // as PATTERN_NOT_COVERED, and details are not reported.
@@ skipping 18 matching lines @@
   int HandleResult(int rv);
 
   // Runs the state transition loop.
   int DoLoop(int result);
 
   // Each of these methods corresponds to a State value.  If there is an
   // argument, the value corresponds to the return of the previous state or
   // corresponding callback.
   int DoGetBackend();
   int DoGetBackendComplete(int result);
+  int DoInitEntry();
+  int DoOpenEntry();
+  int DoOpenEntryComplete(int result);
+  int DoDoomEntry();
+  int DoDoomEntryComplete(int result);
+  int DoCreateEntry();
+  int DoCreateEntryComplete(int result);
+  int DoAddToEntry();
+  int DoAddToEntryComplete(int result);
+  int DoCacheReadResponse();
+  int DoCacheReadResponseComplete(int result);
+  int DoCacheToggleUnusedSincePrefetch();
+  int DoCacheToggleUnusedSincePrefetchComplete(int result);
+  int DoCacheDispatchValidation();
+  int DoCacheQueryData();
+  int DoCacheQueryDataComplete(int result);
+  int DoStartPartialCacheValidation();
+  int DoCompletePartialCacheValidation(int result);
   int DoSendRequest();
   int DoSendRequestComplete(int result);
   int DoSuccessfulSendRequest();
-  int DoNetworkRead();
-  int DoNetworkReadComplete(int result);
-  int DoInitEntry();
-  int DoOpenEntry();
-  int DoOpenEntryComplete(int result);
-  int DoCreateEntry();
-  int DoCreateEntryComplete(int result);
-  int DoDoomEntry();
-  int DoDoomEntryComplete(int result);
-  int DoAddToEntry();
-  int DoAddToEntryComplete(int result);
-  int DoStartPartialCacheValidation();
-  int DoCompletePartialCacheValidation(int result);
   int DoUpdateCachedResponse();
   int DoUpdateCachedResponseComplete(int result);
   int DoOverwriteCachedResponse();
+  int DoCacheWriteResponse();
+  int DoCacheWriteTruncatedResponse();
+  int DoCacheWriteResponseComplete(int result);
   int DoTruncateCachedData();
   int DoTruncateCachedDataComplete(int result);
   int DoTruncateCachedMetadata();
   int DoTruncateCachedMetadataComplete(int result);
   int DoPartialHeadersReceived();
-  int DoCacheReadResponse();
-  int DoCacheReadResponseComplete(int result);
-  int DoCacheDispatchValidation();
-  int DoCacheToggleUnusedSincePrefetch();
-  int DoCacheToggleUnusedSincePrefetchComplete(int result);
-  int DoCacheWriteResponse();
-  int DoCacheWriteTruncatedResponse();
-  int DoCacheWriteResponseComplete(int result);
   int DoCacheReadMetadata();
   int DoCacheReadMetadataComplete(int result);
-  int DoCacheQueryData();
-  int DoCacheQueryDataComplete(int result);
+  int DoNetworkRead();
+  int DoNetworkReadComplete(int result);
   int DoCacheReadData();
   int DoCacheReadDataComplete(int result);
   int DoCacheWriteData(int num_bytes);
   int DoCacheWriteDataComplete(int result);
 
   // These functions are involved in a field trial testing storing certificates
   // in seperate entries from the HttpResponseInfo.
   void ReadCertChain();
   void WriteCertChain();
 
@@ skipping 188 matching lines @@
   BeforeProxyHeadersSentCallback before_proxy_headers_sent_callback_;
 
   base::WeakPtrFactory<Transaction> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Transaction);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_