Created a context_info attachment to our exceptions with information about the contex...

[casparcg] / common / except.h

diff --git a/common/except.h b/common/except.h
index 5a498acbeaa7cdc910c6839b2b4d9281ca6f7b30..6a52f3530a237b79bc5539e66c2220a125785392 100644 (file)
--- a/common/except.h
+++ b/common/except.h
@@ -26,9 +26,12 @@
 #include "os/stack_trace.h"
 
 #include <exception>
+#include <list>
+
 #include <boost/exception/all.hpp>
 #include <boost/exception/error_info.hpp>
 #include <boost/throw_exception.hpp>
+#include <boost/noncopyable.hpp>
 
 namespace caspar {
 
@@ -39,6 +42,7 @@ typedef boost::error_info<struct tag_call_stack_info, std::string>    call_stack_in
 typedef boost::error_info<struct tag_error_info,               std::string>    error_info_t;
 typedef boost::error_info<struct tag_source_info,              std::string>    source_info_t;
 typedef boost::error_info<struct tag_file_name_info,   std::string>    file_name_info_t;
+typedef boost::error_info<struct tag_context_info,             std::string>    context_info_t;
 
 template<typename T>
 inline arg_name_info_t         arg_name_info(const T& str)             {return arg_name_info_t(u8(str));}
@@ -54,6 +58,8 @@ template<typename T>
 inline source_info_t           source_info(const T& str)               {return source_info_t(u8(str));}
 template<typename T>
 inline file_name_info_t                file_name_info(const T& str)    {return file_name_info_t(u8(str));}
+template<typename T>
+inline context_info_t          context_info(const T& str)              {return context_info_t(u8(str));}
 
 typedef boost::error_info<struct tag_line_info, size_t>                                                line_info;
 typedef boost::error_info<struct tag_nested_exception_, std::exception_ptr> nested_exception;
@@ -88,7 +94,39 @@ struct not_implemented                       : virtual caspar_exception {};
 struct user_error                              : virtual caspar_exception {};
 struct not_supported                   : virtual user_error {};
 
-#define CASPAR_THROW_EXCEPTION(e) BOOST_THROW_EXCEPTION(e << call_stack_info(caspar::get_call_stack()))
+std::string get_context();
+
+class scoped_context : boost::noncopyable
+{
+public:
+       scoped_context();
+       scoped_context(std::string msg);
+       template <typename Str>
+       scoped_context(Str msg)
+               : scoped_context(u8(std::move(msg)))
+       {
+       }
+
+       ~scoped_context();
+       void replace_msg(std::string msg);
+       template <typename Str>
+       void replace_msg(std::string msg)
+       {
+               replace_msg(u8(std::move(msg)));
+       }
+       void clear_msg();
+private:
+       std::list<std::string>& for_thread_;
+       std::string*                    msg_;
+};
+
+#define _CASPAR_GENERATE_UNIQUE_IDENTIFIER_CAT(name, line) name##line
+#define _CASPAR_GENERATE_UNIQUE_IDENTIFIER(name, line) _CASPAR_GENERATE_UNIQUE_IDENTIFIER_CAT(name, line)
+#define CASPAR_SCOPED_CONTEXT_MSG(ctx_msg) ::caspar::scoped_context _CASPAR_GENERATE_UNIQUE_IDENTIFIER(SCOPED_CONTEXT, __LINE__)(u8(ctx_msg));
+
+#define CASPAR_THROW_EXCEPTION(e) BOOST_THROW_EXCEPTION(e << call_stack_info(caspar::get_call_stack()) << context_info(get_context()))
+
+std::string get_message_and_context(const caspar_exception& e);
 
 }