Expose TF_NewOperationLocked, TF_FinishOperationLocked, and ToOperation

[rnett]

Expose TF_NewOperationLocked, TF_FinishOperationLocked, and ToOperation to the C API. ToOperation is in c_api_internal.h.

Fixes #48767
Fixes #48815

[saxenasaurabh]

Thanks for sending this PR! TF_NewOperationLocked and TF_FinishOperationLocked look okay. I don't understand how ToOperation will be used though.

[rnett]

I can't see details for the failing test, can someone check it or force a re-run?

[rnett]

From the log:

ERROR: T:/src/github/tensorflow/tensorflow/python/BUILD:370:27: Linking of rule '//tensorflow/python:_pywrap_toco_api.so' failed (Exit 1120): link.exe failed: error executing command
  cd T:/tmp/bigvaudl/execroot/org_tensorflow
  SET LIB=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\lib\x64;C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\lib\um\x64;C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\ucrt\x64;C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\um\x64
    SET PATH=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\\Extensions\Microsoft\IntelliCode\CLI;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.27.29110\bin\HostX64\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\VC\VCPackages;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\bin\Roslyn;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Team Tools\Performance Tools\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Team Tools\Performance Tools;C:\Program Files (x86)\Microsoft Visual Studio\Shared\Common\VSPerfCollectionTools\vs2019\\x64;C:\Program Files (x86)\Microsoft Visual Studio\Shared\Common\VSPerfCollectionTools\vs2019\;C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\x64\;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\devinit;C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64;C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\\MSBuild\Current\Bin;C:\Windows\Microsoft.NET\Framework64\v4.0.30319;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\;;C:\Windows\system32;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja
    SET PWD=/proc/self/cwd
    SET PYTHON_BIN_PATH=C:/Python37/python.exe
    SET PYTHON_LIB_PATH=C:/Python37/lib/site-packages
    SET RUNFILES_MANIFEST_ONLY=1
    SET TEMP=T:\tmp
    SET TF2_BEHAVIOR=1
    SET TMP=T:\tmp
  C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.27.29110/bin/HostX64/x64/link.exe @bazel-out/x64_windows-opt/bin/tensorflow/python/_pywrap_toco_api.so-2.params
Execution platform: @local_execution_config_platform//:platform
   Creating library bazel-out/x64_windows-opt/bin/tensorflow/python/_pywrap_toco_api.so.if.lib and object bazel-out/x64_windows-opt/bin/tensorflow/python/_pywrap_toco_api.so.if.exp
toco_python_api_wrapper.obj : error LNK2019: unresolved external symbol "class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const __cdecl toco::RetrieveCollectedErrors(void)" (?RetrieveCollectedErrors@toco@@YA?BV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@XZ) referenced in function "public: class pybind11::list __cdecl <lambda_a6fa55ed908e737f35e4ed64cca3f463>::operator()(void)const " (??R<lambda_a6fa55ed908e737f35e4ed64cca3f463>@@QEBA?AVlist@pybind11@@XZ)
bazel-out\x64_windows-opt\bin\tensorflow\python\_pywrap_toco_api.so : fatal error LNK1120: 1 unresolved externals

Does not seem to be related to my changes.