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Posted to commits@thrift.apache.org by dr...@apache.org on 2010/10/06 19:09:46 UTC
svn commit: r1005132 - in /incubator/thrift/trunk/lib/cpp/src:
protocol/TBinaryProtocol.cpp transport/TTransport.h
Author: dreiss
Date: Wed Oct 6 17:09:46 2010
New Revision: 1005132
URL: http://svn.apache.org/viewvc?rev=1005132&view=rev
Log:
THRIFT-922. cpp: When reading strings, borrow first
Attempt to get a pointer to the internal transport buffer before copying
onto the heap. This improves performance TFramedTransport and
TMemoryBuffer, and with TBufferedTransport if the string fits within the
buffer.
Modified:
incubator/thrift/trunk/lib/cpp/src/protocol/TBinaryProtocol.cpp
incubator/thrift/trunk/lib/cpp/src/transport/TTransport.h
Modified: incubator/thrift/trunk/lib/cpp/src/protocol/TBinaryProtocol.cpp
URL: http://svn.apache.org/viewvc/incubator/thrift/trunk/lib/cpp/src/protocol/TBinaryProtocol.cpp?rev=1005132&r1=1005131&r2=1005132&view=diff
==============================================================================
--- incubator/thrift/trunk/lib/cpp/src/protocol/TBinaryProtocol.cpp (original)
+++ incubator/thrift/trunk/lib/cpp/src/protocol/TBinaryProtocol.cpp Wed Oct 6 17:09:46 2010
@@ -377,6 +377,15 @@ uint32_t TBinaryProtocol::readStringBody
return result;
}
+ // Try to borrow first
+ const uint8_t* borrow_buf;
+ uint32_t got = size;
+ if ((borrow_buf = trans_->borrow(NULL, &got))) {
+ str.assign((const char*)borrow_buf, size);
+ trans_->consume(size);
+ return size;
+ }
+
// Use the heap here to prevent stack overflow for v. large strings
if (size > string_buf_size_ || string_buf_ == NULL) {
void* new_string_buf = std::realloc(string_buf_, (uint32_t)size);
Modified: incubator/thrift/trunk/lib/cpp/src/transport/TTransport.h
URL: http://svn.apache.org/viewvc/incubator/thrift/trunk/lib/cpp/src/transport/TTransport.h?rev=1005132&r1=1005131&r2=1005132&view=diff
==============================================================================
--- incubator/thrift/trunk/lib/cpp/src/transport/TTransport.h (original)
+++ incubator/thrift/trunk/lib/cpp/src/transport/TTransport.h Wed Oct 6 17:09:46 2010
@@ -167,7 +167,10 @@ class TTransport {
*
* @oaram buf A buffer where the data can be stored if needed.
* If borrow doesn't return buf, then the contents of
- * buf after the call are undefined.
+ * buf after the call are undefined. This parameter may be
+ * NULL to indicate that the caller is not supplying storage,
+ * but would like a pointer into an internal buffer, if
+ * available.
* @param len *len should initially contain the number of bytes to borrow.
* If borrow succeeds, *len will contain the number of bytes
* available in the returned pointer. This will be at least