Add ability to override default thread pool

11 files changed, 68 insertions, 4 deletions

diff --git a/BUILD b/BUILD
index 8b8072ec0d..706f02c5a9 100644
--- a/BUILD
+++ b/BUILD
@@ -582,6 +582,7 @@ cc_library(
     "src/cpp/common/rpc_method.cc",
     "src/cpp/proto/proto_utils.cc",
     "src/cpp/server/async_generic_service.cc",
+    "src/cpp/server/create_default_thread_pool.cc",
     "src/cpp/server/insecure_server_credentials.cc",
     "src/cpp/server/server.cc",
     "src/cpp/server/server_builder.cc",
@@ -661,6 +662,7 @@ cc_library(
     "src/cpp/common/rpc_method.cc",
     "src/cpp/proto/proto_utils.cc",
     "src/cpp/server/async_generic_service.cc",
+    "src/cpp/server/create_default_thread_pool.cc",
     "src/cpp/server/insecure_server_credentials.cc",
     "src/cpp/server/server.cc",
     "src/cpp/server/server_builder.cc",
diff --git a/Makefile b/Makefile
index 1518578464..3160a1b3db 100644
--- a/Makefile
+++ b/Makefile
@@ -3331,6 +3331,7 @@ LIBGRPC++_SRC = \
     src/cpp/common/rpc_method.cc \
     src/cpp/proto/proto_utils.cc \
     src/cpp/server/async_generic_service.cc \
+    src/cpp/server/create_default_thread_pool.cc \
     src/cpp/server/insecure_server_credentials.cc \
     src/cpp/server/server.cc \
     src/cpp/server/server_builder.cc \
@@ -3618,6 +3619,7 @@ LIBGRPC++_UNSECURE_SRC = \
     src/cpp/common/rpc_method.cc \
     src/cpp/proto/proto_utils.cc \
     src/cpp/server/async_generic_service.cc \
+    src/cpp/server/create_default_thread_pool.cc \
     src/cpp/server/insecure_server_credentials.cc \
     src/cpp/server/server.cc \
     src/cpp/server/server_builder.cc \
diff --git a/build.json b/build.json
index aaa627a268..f5d05e1ad2 100644
--- a/build.json
+++ b/build.json
@@ -83,6 +83,7 @@
         "src/cpp/common/rpc_method.cc",
         "src/cpp/proto/proto_utils.cc",
         "src/cpp/server/async_generic_service.cc",
+        "src/cpp/server/create_default_thread_pool.cc",
         "src/cpp/server/insecure_server_credentials.cc",
         "src/cpp/server/server.cc",
         "src/cpp/server/server_builder.cc",
diff --git a/src/cpp/server/create_default_thread_pool.cc b/src/cpp/server/create_default_thread_pool.cc
new file mode 100644
index 0000000000..89c1d7e929
--- /dev/null
+++ b/src/cpp/server/create_default_thread_pool.cc
@@ -0,0 +1,49 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may 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 <grpc/support/cpu.h>
+#include "src/cpp/server/thread_pool.h"
+
+#ifndef GRPC_CUSTOM_DEFAULT_THREAD_POOL
+
+namespace grpc {
+
+ThreadPoolInterface* CreateDefaultThreadPool() {
+   int cores = gpr_cpu_num_cores();
+   if (!cores) cores = 4;
+   return new ThreadPool(cores);
+}
+
+}  // namespace grpc
+
+#endif  // !GRPC_CUSTOM_DEFAULT_THREAD_POOL
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 4bcbd82952..3ee1d54e76 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -87,9 +87,7 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
     return nullptr;
   }
   if (!thread_pool_ && !services_.empty()) {
-    int cores = gpr_cpu_num_cores();
-    if (!cores) cores = 4;
-    thread_pool_ = new ThreadPool(cores);
+    thread_pool_ = CreateDefaultThreadPool();
     thread_pool_owned = true;
   }
   std::unique_ptr<Server> server(
diff --git a/src/cpp/server/thread_pool.h b/src/cpp/server/thread_pool.h
index 26f25611b5..3b70249bf9 100644
--- a/src/cpp/server/thread_pool.h
+++ b/src/cpp/server/thread_pool.h
@@ -62,6 +62,8 @@ class ThreadPool GRPC_FINAL : public ThreadPoolInterface {
   void ThreadFunc();
 };
 
+ThreadPoolInterface* CreateDefaultThreadPool();
+
 }  // namespace grpc
 
 #endif  // GRPC_INTERNAL_CPP_SERVER_THREAD_POOL_H
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index b7d05b3ea7..5d016a6069 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -760,7 +760,7 @@ WARN_LOGFILE           =
 # spaces.
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = include/grpc++/async_generic_service.h include/grpc++/async_unary_call.h include/grpc++/byte_buffer.h include/grpc++/channel_arguments.h include/grpc++/channel_interface.h include/grpc++/client_context.h include/grpc++/completion_queue.h include/grpc++/config.h include/grpc++/create_channel.h include/grpc++/credentials.h include/grpc++/generic_stub.h include/grpc++/impl/call.h include/grpc++/impl/client_unary_call.h include/grpc++/impl/grpc_library.h include/grpc++/impl/internal_stub.h include/grpc++/impl/rpc_method.h include/grpc++/impl/rpc_service_method.h include/grpc++/impl/service_type.h include/grpc++/impl/sync.h include/grpc++/impl/sync_cxx11.h include/grpc++/impl/sync_no_cxx11.h include/grpc++/impl/thd.h include/grpc++/impl/thd_cxx11.h include/grpc++/impl/thd_no_cxx11.h include/grpc++/server.h include/grpc++/server_builder.h include/grpc++/server_context.h include/grpc++/server_credentials.h include/grpc++/slice.h include/grpc++/status.h include/grpc++/status_code_enum.h include/grpc++/stream.h include/grpc++/thread_pool_interface.h include/grpc++/time.h src/cpp/client/secure_credentials.h src/cpp/server/secure_server_credentials.h src/cpp/client/channel.h src/cpp/proto/proto_utils.h src/cpp/server/thread_pool.h src/cpp/client/secure_credentials.cc src/cpp/server/secure_server_credentials.cc src/cpp/client/channel.cc src/cpp/client/channel_arguments.cc src/cpp/client/client_context.cc src/cpp/client/client_unary_call.cc src/cpp/client/create_channel.cc src/cpp/client/credentials.cc src/cpp/client/generic_stub.cc src/cpp/client/insecure_credentials.cc src/cpp/client/internal_stub.cc src/cpp/common/call.cc src/cpp/common/completion_queue.cc src/cpp/common/rpc_method.cc src/cpp/proto/proto_utils.cc src/cpp/server/async_generic_service.cc src/cpp/server/insecure_server_credentials.cc src/cpp/server/server.cc src/cpp/server/server_builder.cc src/cpp/server/server_context.cc src/cpp/server/server_credentials.cc src/cpp/server/thread_pool.cc src/cpp/util/byte_buffer.cc src/cpp/util/slice.cc src/cpp/util/status.cc src/cpp/util/time.cc
+INPUT                  = include/grpc++/async_generic_service.h include/grpc++/async_unary_call.h include/grpc++/byte_buffer.h include/grpc++/channel_arguments.h include/grpc++/channel_interface.h include/grpc++/client_context.h include/grpc++/completion_queue.h include/grpc++/config.h include/grpc++/create_channel.h include/grpc++/credentials.h include/grpc++/generic_stub.h include/grpc++/impl/call.h include/grpc++/impl/client_unary_call.h include/grpc++/impl/grpc_library.h include/grpc++/impl/internal_stub.h include/grpc++/impl/rpc_method.h include/grpc++/impl/rpc_service_method.h include/grpc++/impl/service_type.h include/grpc++/impl/sync.h include/grpc++/impl/sync_cxx11.h include/grpc++/impl/sync_no_cxx11.h include/grpc++/impl/thd.h include/grpc++/impl/thd_cxx11.h include/grpc++/impl/thd_no_cxx11.h include/grpc++/server.h include/grpc++/server_builder.h include/grpc++/server_context.h include/grpc++/server_credentials.h include/grpc++/slice.h include/grpc++/status.h include/grpc++/status_code_enum.h include/grpc++/stream.h include/grpc++/thread_pool_interface.h include/grpc++/time.h src/cpp/client/secure_credentials.h src/cpp/server/secure_server_credentials.h src/cpp/client/channel.h src/cpp/proto/proto_utils.h src/cpp/server/thread_pool.h src/cpp/client/secure_credentials.cc src/cpp/server/secure_server_credentials.cc src/cpp/client/channel.cc src/cpp/client/channel_arguments.cc src/cpp/client/client_context.cc src/cpp/client/client_unary_call.cc src/cpp/client/create_channel.cc src/cpp/client/credentials.cc src/cpp/client/generic_stub.cc src/cpp/client/insecure_credentials.cc src/cpp/client/internal_stub.cc src/cpp/common/call.cc src/cpp/common/completion_queue.cc src/cpp/common/rpc_method.cc src/cpp/proto/proto_utils.cc src/cpp/server/async_generic_service.cc src/cpp/server/create_default_thread_pool.cc src/cpp/server/insecure_server_credentials.cc src/cpp/server/server.cc src/cpp/server/server_builder.cc src/cpp/server/server_context.cc src/cpp/server/server_credentials.cc src/cpp/server/thread_pool.cc src/cpp/util/byte_buffer.cc src/cpp/util/slice.cc src/cpp/util/status.cc src/cpp/util/time.cc
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/vsprojects/grpc++/grpc++.vcxproj b/vsprojects/grpc++/grpc++.vcxproj
index 46b4a4c0eb..d233f9e3d3 100644
--- a/vsprojects/grpc++/grpc++.vcxproj
+++ b/vsprojects/grpc++/grpc++.vcxproj
@@ -221,6 +221,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\async_generic_service.cc">
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\server.cc">
diff --git a/vsprojects/grpc++/grpc++.vcxproj.filters b/vsprojects/grpc++/grpc++.vcxproj.filters
index d5eeb71790..dd375c7238 100644
--- a/vsprojects/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/grpc++/grpc++.vcxproj.filters
@@ -49,6 +49,9 @@
     <ClCompile Include="..\..\src\cpp\server\async_generic_service.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
+      <Filter>src\cpp\server</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
diff --git a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj
index 026bbea51d..9b2ef9137d 100644
--- a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -215,6 +215,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\async_generic_service.cc">
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\server.cc">
diff --git a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 7221027afd..d616e336e4 100644
--- a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -43,6 +43,9 @@
     <ClCompile Include="..\..\src\cpp\server\async_generic_service.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
+      <Filter>src\cpp\server</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>