Eliminate dependence on boost::interprocess #8223

In this repo, `boost::interprocess` was being used soley to make `uint32_t` operations atomic. So I replaced each instance of
`boost::interprocess::ipcdetail::atomic(...)32` with `std::atomic` methods. I replaced member declarations as applicable. For example,
when I needed to change a `volatile uint32_t` into a `std::atomic<uint32_t>`. Sometimes, a member was being used a boolean flag, so
I replaced it with `std::atomic<bool>`.

You may notice that I didn't touch `levin_client_async.h`. That is because this file is entirely unused and will be deleted in PR monero-project#8211.

Additional changes from review:
* Make some local variables const
* Change postfix operators to prefix operators where value was not need

7 files changed, 34 insertions, 39 deletions

diff --git a/contrib/epee/include/net/abstract_tcp_server2.h b/contrib/epee/include/net/abstract_tcp_server2.h
index f40cd108a..51aa9f275 100644
--- a/contrib/epee/include/net/abstract_tcp_server2.h
+++ b/contrib/epee/include/net/abstract_tcp_server2.h
@@ -49,7 +49,6 @@
 #include <boost/asio/ssl.hpp>
 #include <boost/array.hpp>
 #include <boost/enable_shared_from_this.hpp>
-#include <boost/interprocess/detail/atomic.hpp>
 #include <boost/thread/thread.hpp>
 #include "byte_slice.h"
 #include "net_utils_base.h"
@@ -393,7 +392,7 @@ namespace net_utils
     std::vector<boost::shared_ptr<boost::thread> > m_threads;
     boost::thread::id m_main_thread_id;
     critical_section m_threads_lock;
-    volatile uint32_t m_thread_index; // TODO change to std::atomic
+    std::atomic<uint32_t> m_thread_index;
 
     t_connection_type m_connection_type;
 
diff --git a/contrib/epee/include/net/abstract_tcp_server2.inl b/contrib/epee/include/net/abstract_tcp_server2.inl
index 89971bea2..58cec5520 100644
--- a/contrib/epee/include/net/abstract_tcp_server2.inl
+++ b/contrib/epee/include/net/abstract_tcp_server2.inl
@@ -384,7 +384,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
       {  
         //_info("[sock " << socket().native_handle() << "] protocol_want_close");
         //some error in protocol, protocol handler ask to close connection
-        boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
+        m_want_close_connection = true;
         bool do_shutdown = false;
         CRITICAL_REGION_BEGIN(m_send_que_lock);
         if(!m_send_que.size())
@@ -478,7 +478,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
       if (!handshake(boost::asio::ssl::stream_base::server, boost::asio::const_buffer(buffer_.data(), buffer_ssl_init_fill)))
       {
         MERROR("SSL handshake failed");
-        boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
+        m_want_close_connection = true;
         m_ready_to_close = true;
         bool do_shutdown = false;
         CRITICAL_REGION_BEGIN(m_send_que_lock);
@@ -834,7 +834,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
     CRITICAL_REGION_BEGIN(m_send_que_lock);
     send_que_size = m_send_que.size();
     CRITICAL_REGION_END();
-    boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
+    m_want_close_connection = true;
     if(!send_que_size)
     {
       shutdown();
@@ -889,7 +889,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
     m_send_que.pop_front();
     if(m_send_que.empty())
     {
-      if(boost::interprocess::ipcdetail::atomic_read32(&m_want_close_connection))
+      if(m_want_close_connection)
       {
         do_shutdown = true;
       }
@@ -1119,7 +1119,7 @@ POP_WARNINGS
   bool boosted_tcp_server<t_protocol_handler>::worker_thread()
   {
     TRY_ENTRY();
-    uint32_t local_thr_index = boost::interprocess::ipcdetail::atomic_inc32(&m_thread_index); 
+    const uint32_t local_thr_index = m_thread_index++; // atomically increment, getting value before increment
     std::string thread_name = std::string("[") + m_thread_name_prefix;
     thread_name += boost::to_string(local_thr_index) + "]";
     MLOG_SET_THREAD_NAME(thread_name);
diff --git a/contrib/epee/include/net/connection_basic.hpp b/contrib/epee/include/net/connection_basic.hpp
index 23873f65b..01599aa4e 100644
--- a/contrib/epee/include/net/connection_basic.hpp
+++ b/contrib/epee/include/net/connection_basic.hpp
@@ -106,7 +106,7 @@ class connection_basic { // not-templated base class for rapid developmet of som
 		std::unique_ptr< connection_basic_pimpl > mI; // my Implementation
 
 		// moved here from orginal connecton<> - common member variables that do not depend on template in connection<>
-    volatile uint32_t m_want_close_connection;
+    std::atomic<bool> m_want_close_connection;
     std::atomic<bool> m_was_shutdown;
     critical_section m_send_que_lock;
     std::deque<byte_slice> m_send_que;
diff --git a/contrib/epee/include/net/levin_protocol_handler_async.h b/contrib/epee/include/net/levin_protocol_handler_async.h
index a6816cafc..7cc42b5c4 100644
--- a/contrib/epee/include/net/levin_protocol_handler_async.h
+++ b/contrib/epee/include/net/levin_protocol_handler_async.h
@@ -28,7 +28,6 @@
 #include <boost/asio/deadline_timer.hpp>
 #include <boost/uuid/uuid_generators.hpp>
 #include <boost/unordered_map.hpp>
-#include <boost/interprocess/detail/atomic.hpp>
 #include <boost/smart_ptr/make_shared.hpp>
 
 #include <atomic>
@@ -166,7 +165,7 @@ public:
   };
 
   std::atomic<bool> m_protocol_released;
-  volatile uint32_t m_invoke_buf_ready;
+  std::atomic<bool> m_invoke_buf_ready;
 
   volatile int m_invoke_result_code;
 
@@ -175,8 +174,8 @@ public:
 
   critical_section m_call_lock;
 
-  volatile uint32_t m_wait_count;
-  volatile uint32_t m_close_called;
+  std::atomic<uint32_t> m_wait_count;
+  std::atomic<uint32_t> m_close_called;
   bucket_head2 m_current_head;
   net_utils::i_service_endpoint* m_pservice_endpoint; 
   config_type& m_config;
@@ -319,7 +318,7 @@ public:
     m_wait_count = 0;
     m_oponent_protocol_ver = 0;
     m_connection_initialized = false;
-    m_invoke_buf_ready = 0;
+    m_invoke_buf_ready = false;
     m_invoke_result_code = LEVIN_ERROR_CONNECTION;
   }
   virtual ~async_protocol_handler()
@@ -332,11 +331,11 @@ public:
       m_config.del_connection(this);
     }
 
-    for (size_t i = 0; i < 60 * 1000 / 100 && 0 != boost::interprocess::ipcdetail::atomic_read32(&m_wait_count); ++i)
+    for (size_t i = 0; i < 60 * 1000 / 100 && 0 != m_wait_count; ++i)
     {
       misc_utils::sleep_no_w(100);
     }
-    CHECK_AND_ASSERT_MES_NO_RET(0 == boost::interprocess::ipcdetail::atomic_read32(&m_wait_count), "Failed to wait for operation completion. m_wait_count = " << m_wait_count);
+    CHECK_AND_ASSERT_MES_NO_RET(0 == m_wait_count, "Failed to wait for operation completion. m_wait_count = " << m_wait_count.load());
 
     MTRACE(m_connection_context << "~async_protocol_handler()");
 
@@ -352,13 +351,13 @@ public:
       MERROR(m_connection_context << "[levin_protocol] -->> start_outer_call failed");
       return false;
     }
-    boost::interprocess::ipcdetail::atomic_inc32(&m_wait_count);
+    ++m_wait_count;
     return true;
   }
   bool finish_outer_call()
   {
     MTRACE(m_connection_context << "[levin_protocol] <<-- finish_outer_call");
-    boost::interprocess::ipcdetail::atomic_dec32(&m_wait_count);
+    --m_wait_count;
     m_pservice_endpoint->release();
     return true;
   }
@@ -382,7 +381,7 @@ public:
   
   bool close()
   {    
-    boost::interprocess::ipcdetail::atomic_inc32(&m_close_called);
+    ++m_close_called;
 
     m_pservice_endpoint->close();
     return true;
@@ -408,7 +407,7 @@ public:
 
   virtual bool handle_recv(const void* ptr, size_t cb)
   {
-    if(boost::interprocess::ipcdetail::atomic_read32(&m_close_called))
+    if(m_close_called)
       return false; //closing connections
 
     if(!m_config.m_pcommands_handler)
@@ -524,7 +523,7 @@ public:
             {
               invoke_response_handlers_guard.unlock();
               //use sync call scenario
-              if(!boost::interprocess::ipcdetail::atomic_read32(&m_wait_count) && !boost::interprocess::ipcdetail::atomic_read32(&m_close_called))
+              if(!m_wait_count && !m_close_called)
               {
                 MERROR(m_connection_context << "no active invoke when response came, wtf?");
                 return false;
@@ -535,7 +534,7 @@ public:
                 buff_to_invoke = epee::span<const uint8_t>((const uint8_t*)NULL, 0);
                 m_invoke_result_code = m_current_head.m_return_code;
                 CRITICAL_REGION_END();
-                boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 1);
+                m_invoke_buf_ready = true;
               }
             }
           }else
@@ -642,7 +641,7 @@ public:
     {
       CRITICAL_REGION_LOCAL(m_call_lock);
 
-      boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 0);
+      m_invoke_buf_ready = false;
       CRITICAL_REGION_BEGIN(m_invoke_response_handlers_lock);
 
       if (command == m_connection_context.handshake_command())
@@ -681,7 +680,7 @@ public:
 
     CRITICAL_REGION_LOCAL(m_call_lock);
 
-    boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 0);
+    m_invoke_buf_ready = false;
 
     if (command == m_connection_context.handshake_command())
       m_max_packet_size = m_config.m_max_packet_size;
@@ -695,7 +694,7 @@ public:
     uint64_t ticks_start = misc_utils::get_tick_count();
     size_t prev_size = 0;
 
-    while(!boost::interprocess::ipcdetail::atomic_read32(&m_invoke_buf_ready) && !m_protocol_released)
+    while(!m_invoke_buf_ready && !m_protocol_released)
     {
       if(m_cache_in_buffer.size() - prev_size >= MIN_BYTES_WANTED)
       {
diff --git a/contrib/epee/include/net/net_helper.h b/contrib/epee/include/net/net_helper.h
index a1f44cab0..0a35797fd 100644
--- a/contrib/epee/include/net/net_helper.h
+++ b/contrib/epee/include/net/net_helper.h
@@ -42,7 +42,6 @@
 #include <boost/thread/future.hpp>
 #include <boost/lambda/bind.hpp>
 #include <boost/lambda/lambda.hpp>
-#include <boost/interprocess/detail/atomic.hpp>
 #include <boost/system/error_code.hpp>
 #include <boost/utility/string_ref.hpp>
 #include <functional>
@@ -110,7 +109,7 @@ namespace net_utils
 				m_initialized(true),
 				m_connected(false),
 				m_deadline(m_io_service, std::chrono::steady_clock::time_point::max()),
-				m_shutdowned(0),
+				m_shutdowned(false),
 				m_bytes_sent(0),
 				m_bytes_received(0)
 		{
@@ -435,7 +434,7 @@ namespace net_utils
 				async_read(&buff[0], max_size, boost::asio::transfer_at_least(1), hndlr);
 
 				// Block until the asynchronous operation has completed.
-				while (ec == boost::asio::error::would_block && !boost::interprocess::ipcdetail::atomic_read32(&m_shutdowned))
+				while (ec == boost::asio::error::would_block && !m_shutdowned)
 				{
 					m_io_service.reset();
 					m_io_service.run_one(); 
@@ -519,7 +518,7 @@ namespace net_utils
 				async_read((char*)buff.data(), buff.size(), boost::asio::transfer_at_least(buff.size()), hndlr);
 				
 				// Block until the asynchronous operation has completed.
-				while (ec == boost::asio::error::would_block && !boost::interprocess::ipcdetail::atomic_read32(&m_shutdowned))
+				while (ec == boost::asio::error::would_block && !m_shutdowned)
 				{
 					m_io_service.run_one(); 
 				}
@@ -576,7 +575,7 @@ namespace net_utils
 			m_ssl_socket->next_layer().close(ec);
 			if(ec)
 				MDEBUG("Problems at close: " << ec.message());
-			boost::interprocess::ipcdetail::atomic_write32(&m_shutdowned, 1);
+			m_shutdowned = true;
       m_connected = false;
 			return true;
 		}
@@ -685,7 +684,7 @@ namespace net_utils
 		bool m_initialized;
 		bool m_connected;
 		boost::asio::steady_timer m_deadline;
-		volatile uint32_t m_shutdowned;
+		std::atomic<bool> m_shutdowned;
 		std::atomic<uint64_t> m_bytes_sent;
 		std::atomic<uint64_t> m_bytes_received;
 	};
diff --git a/contrib/epee/include/net/network_throttle.hpp b/contrib/epee/include/net/network_throttle.hpp
index b6f7592c2..73caa396c 100644
--- a/contrib/epee/include/net/network_throttle.hpp
+++ b/contrib/epee/include/net/network_throttle.hpp
@@ -42,11 +42,9 @@
 #include <vector>
 #include <boost/noncopyable.hpp>
 #include <boost/shared_ptr.hpp>
-#include <atomic>
 
 #include <boost/array.hpp>
 #include <boost/enable_shared_from_this.hpp>
-#include <boost/interprocess/detail/atomic.hpp>
 #include <boost/thread/thread.hpp>
 
 #include "syncobj.h"
diff --git a/contrib/epee/include/reg_exp_definer.h b/contrib/epee/include/reg_exp_definer.h
index 386a45f9a..d1b800a32 100644
--- a/contrib/epee/include/reg_exp_definer.h
+++ b/contrib/epee/include/reg_exp_definer.h
@@ -28,7 +28,7 @@
 #ifndef _REG_EXP_DEFINER_H_
 #define _REG_EXP_DEFINER_H_
 
-#include <boost/interprocess/detail/atomic.hpp>
+#include <atomic>
 #include <boost/regex.hpp>
 #include "syncobj.h"
 
@@ -46,38 +46,38 @@ namespace epee
   const static global_regexp_critical_section gregexplock;
 
 #define STATIC_REGEXP_EXPR_1(var_name, xpr_text, reg_exp_flags) \
-	static volatile uint32_t regexp_initialized_1 = 0;\
+	static std::atomic<bool> regexp_initialized_1(false);\
 	volatile uint32_t local_is_initialized_1 = regexp_initialized_1;\
 	if(!local_is_initialized_1)\
 	gregexplock.get_lock().lock();\
 	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
 	if(!local_is_initialized_1)\
 {\
-	boost::interprocess::ipcdetail::atomic_write32(&regexp_initialized_1, 1);\
+	regexp_initialized_1 = true;\
 	gregexplock.get_lock().unlock();\
 }
 
 #define STATIC_REGEXP_EXPR_2(var_name, xpr_text, reg_exp_flags) \
-	static volatile uint32_t regexp_initialized_2 = 0;\
+	static std::atomic<bool> regexp_initialized_2(false);\
 	volatile uint32_t local_is_initialized_2 = regexp_initialized_2;\
 	if(!local_is_initialized_2)\
 	gregexplock.get_lock().lock().lock();\
 	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
 	if(!local_is_initialized_2)\
 {\
-	boost::interprocess::ipcdetail::atomic_write32(&regexp_initialized_2, 1);\
+	regexp_initialized_2 = true;\
 	gregexplock.get_lock().lock().unlock();\
 }
 
 #define STATIC_REGEXP_EXPR_3(var_name, xpr_text, reg_exp_flags) \
-	static volatile uint32_t regexp_initialized_3 = 0;\
+	static std::atomic<bool> regexp_initialized_3(false);\
 	volatile uint32_t local_is_initialized_3 = regexp_initialized_3;\
 	if(!local_is_initialized_3)\
 	gregexplock.get_lock().lock().lock();\
 	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
 	if(!local_is_initialized_3)\
 {\
-	boost::interprocess::ipcdetail::atomic_write32(&regexp_initialized_3, 1);\
+	regexp_initialized_3 = true;\
 	gregexplock.get_lock().lock().unlock();\
 }
 }