diff options
Diffstat (limited to 'cpp')
| -rw-r--r-- | cpp/demo/Ice/nrvo/README | 54 |
1 files changed, 31 insertions, 23 deletions
diff --git a/cpp/demo/Ice/nrvo/README b/cpp/demo/Ice/nrvo/README index 105db4a5a32..7cfbfe674a6 100644 --- a/cpp/demo/Ice/nrvo/README +++ b/cpp/demo/Ice/nrvo/README @@ -1,14 +1,17 @@ -A simple demo that show how Ice take advantage of NRVO (Named Return Value Optimization) -include in moderm c++ compilers. +A simple demo that show how Ice take advantage of NRVO +(Named Return Value Optimization) include in modern c++ compilers. -GCC and Visual Studio compilers suport this optimization +GCC and Visual Studio compilers support this optimization - You could read more about Visual Studio NRVO at - http://msdn.microsoft.com/en-us/library/ms364057(VS.80).aspx + You could read more about Visual Studio NRVO at: - For GCC NRVO was first introduced in gcc-3.1 see the release changes for details - http://www.gnu.org/software/gcc/gcc-3.1/changes.html + * http://msdn.microsoft.com/en-us/library/ms364057(VS.80).aspx + + For GCC NRVO was first introduced in gcc-3.1 see the release + changes at: + + * http://www.gnu.org/software/gcc/gcc-3.1/changes.html To run the demo, first start the server: @@ -18,24 +21,29 @@ In a separate window, start the client: $ client -When you start the client it show you a menu with different operations -you can invoke each operation pressing the correspoding key. +When you start the client it show you a menu with different +operations, you can invoke each operation pressing the corresponding +key. -All this operations return a string sequence mapped to a custom class MyStringSeq, -when a copy is made the message "MyStringSeq copy ctor" is wrote to the console, this -permit you see what copies of the returned data are made by Ice run time. +All this operations return a string sequence mapped to a custom class +MyStringSeq, when a copy is made the message "MyStringSeq copy ctor" +is wrote to the console, this permit you see what copies of the +returned data are made by Ice run time. -To make sure the optimzations are aply you should compile the demo with optimizations -enabled. +To make sure the optimizations are applied you should compile the demo +with optimizations enabled. -If you call an operation the client and server should print a message "calling <opname>" -and bellow that message you will see as many "MyStringSeq copy ctor" messages as copies -are made. +If you call an operation the client and server should print a message +"calling <operation name>" and bellow that message you will see as +many "MyStringSeq copy ctor" messages as copies are made. -In the server side we show 1 case when NRVO works, that is a function that -has a single return path implemented in NrvoI::op1 . And 2 case where NRVO dont work, a -function that return a data member of the servant implemented in NrvoI::op2 and a function -with multiple returns path implemented in NrvoI::op3. +In the server side we show one case when NRVO works, that is a +function that has a single return path implemented and is +implementation is NrvoI::op1, and two case where NRVO don't work, a +function that return a data member of the servant the implementation +is in NrvoI::op2 and a function with multiple returns path +implemented in NrvoI::op3. -So if you press option 1 you will see that NRVO is apply in both client and server sides, -and if you call 2 or 3 the optimization only apply to client side. +So if you press option 1 you will see that NRVO is apply in both +client and server sides, and if you call 2 or 3 the optimization only +apply to client side. |