[WIP, RFC] Problem: lot of use of dynamic memory allocation, leading to performance degradation and non-determism

CMakeLists.txt

@@ -214,9 +214,9 @@ endif()
 # Select curve encryption library, defaults to tweetnacl To use libsodium instead, use --with-libsodium(must be
 # installed) To disable curve, use --disable-curve
 
-option(WITH_LIBSODIUM "Use libsodium instead of built-in tweetnacl" ON)
+option(WITH_LIBSODIUM "Use libsodium instead of built-in tweetnacl" OFF)
 option(WITH_LIBSODIUM_STATIC "Use static libsodium library" OFF)
-option(ENABLE_CURVE "Enable CURVE security" ON)
+option(ENABLE_CURVE "Enable CURVE security" OFF)
 
 if(ENABLE_CURVE)
   if(WITH_LIBSODIUM)
@@ -571,6 +571,8 @@ if(MSVC)
 
     zmq_check_cxx_flag_prepend("/analyze")
 
+    zmq_check_cxx_flag_prepend("/Zc:__cplusplus") # enables right reporting of __cplusplus, ref. https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
+
     # C++11/14/17-specific, but maybe possible via conditional defines
     zmq_check_cxx_flag_prepend("/wd26440") # Function '...' can be declared 'noexcept'
     zmq_check_cxx_flag_prepend("/wd26432") # If you define or delete any default operation in the type '...', define or
@@ -849,6 +851,8 @@ endif()
 set(cxx-sources
     precompiled.cpp
     address.cpp
+    allocator_default.cpp
+    allocator_global_pool.cpp
     channel.cpp
     client.cpp
     clock.cpp
@@ -949,9 +953,12 @@ set(cxx-sources
     zmtp_engine.cpp
     # at least for VS, the header files must also be listed
     address.hpp
+    allocator_default.hpp
+    allocator_global_pool.cpp
     array.hpp
     atomic_counter.hpp
     atomic_ptr.hpp
+    basic_concurrent_queue.hpp
     blob.hpp
     channel.hpp
     client.hpp
@@ -1091,6 +1098,8 @@ set(cxx-sources
     zap_client.hpp
     zmtp_engine.hpp)
 
+list(APPEND sources ${CMAKE_CURRENT_SOURCE_DIR}/external/mpmcqueue/concurrentqueue.h)
+
 if(MINGW)
   # Generate the right type when using -m32 or -m64
   macro(set_rc_arch rc_target)
@@ -1219,7 +1228,7 @@ if(ZMQ_BUILD_FRAMEWORK)
     COMMENT "Perf tools")
 endif()
 
-option(ENABLE_PRECOMPILED "Enable precompiled headers, if possible" ON)
+option(ENABLE_PRECOMPILED "Enable precompiled headers, if possible" OFF)
 if(MSVC AND ENABLE_PRECOMPILED)
   # default for all sources is to use precompiled headers
   foreach(source ${sources})

Makefile.am

@@ -20,11 +20,17 @@ include_HEADERS = \
 	include/zmq_utils.h
 
 src_libzmq_la_SOURCES = \
+	external/mpmcqueue/concurrentqueue.h \
 	src/address.cpp \
 	src/address.hpp \
+	src/allocator_default.cpp \
+	src/allocator_default.hpp \
+	src/allocator_global_pool.cpp \
+	src/allocator_global_pool.hpp \
 	src/array.hpp \
 	src/atomic_counter.hpp \
 	src/atomic_ptr.hpp \
+	src/basic_concurrent_queue.hpp \
 	src/blob.hpp \
 	src/channel.cpp \
 	src/channel.hpp \