"what does the c++ compiler do to ensure that different but adjacent memory locations are safe to be used on different threads?" Code Answer
Answers related to “what does the c++ compiler do to ensure that different but adjacent memory locations are safe to be used on different threads?”
- What does the function getName do in symfony 2 form
- Set a variable in a class to be used on multiple functions/methods
- What does the “yield” keyword do?
- What does the 'static' keyword do in a class?
- What does the exclamation mark do before the function?
- What does the 'b' character do in front of a string literal?
- What does the Ellipsis object do?
- What does the “at” (@) symbol do in Python?
- What does the question mark and the colon (?: ternary operator) mean in objective-c?
- What does the “|” (single pipe) do in JavaScript?
- When should std::move be used on a function return value?
- What does the (unary) * operator do in this Ruby code?
- Will two atomic writes to different locations in different threads always be seen in the same order by other threads?
- How does the C# compiler detect COM types?
- What does a lock statement do under the hood?
- In C++/CLI, what does the hat character ^ do?
- What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
- What does the brk() system call do?
- What does the registerNatives() method do?
- What does the C standard say about bitshifting more bits than the width of type?
- What's the C++ idiom equivalent to the Java static block?
- What does the standard say about how calling clear on a vector changes the capacity?
- What does the FD_CLOEXEC fcntl() flag do?
- What does the “Couldn't compile connection:” error mean?
- What does the fpermissive flag do?
- What does the crossContext attribute do in Tomcat? Does it enable session sharing?
- What does the compiler error “missing binary operator before token” mean?
- COM object that has been separated from its underlying RCW cannot be used
- How to ensure that the template parameter is a subtype of a desired type?
- What does the “Link Library Dependency” linker option actually do in Visual Studio 2010 - 2015 and upwards?
- What does the == operator actually do on a Python dictionary?
- Why does the property I want to mock need to be virtual?
- What does the dot-slash do to PHP include calls?
- What does the @ prefix do on string literals in C#
- What does the new keyword do under the hood?
- What does the “undefined reference to varName” in C mean?
- Why does the WPF designer fail to load libraries that call into unmanaged DLLs?
- What does the UseCompressedOops JVM flag do and when should I use it?
- Why does the C# compiler complain that “types may unify” when they derive from different base classes?
- How does the C++ compiler know which implementation of a virtual function to call?
- Why can a 352GB NumPy ndarray be used on an 8GB memory macOS computer?
- What Rules does compiler have to follow when dealing with volatile memory locations?
- What is the maximum memory available to a C++ application on 32-bit Windows?
- Is it possible to configure a Facebook app to be used across multiple domains?
- What does the length attribute do when set on the @Column JPA annontation?
- std::vector needs to have dll-interface to be used by clients of class 'X<T> warning
- What does the “Prefer 32-bit” compiler flag mean for Visual Studio (C#, VB)?
- What does the C++ new operator do other than allocation and a ctor call?
- What Does the [Flags] Attribute Really Do?
- Does the compiler decide when to inline my functions (in C++)?
- Why does the Rust compiler not optimize code assuming that two mutable references cannot alias?
- When is “Try” supposed to be used in C# method names?
- What does the angular compiler “compile”?
- Is prevTask.Wait() recommended to be used with ContinueWith (from the Tasks library)?
- What does delete command really do for memory, for pointers in C++?
- What's the C++ 11 way to fire off an asynchronous task and forget about it?
- What does the shmop PHP extension do?
- What is the maximum size of static array that can be declared in GCC?
- Can the Libsndfile library be used on the iPhone iOS?
- What is gsl::multi_span to be used for?
- What does the “>>” operator in C# do?
- JVM sawtooth pattern when idle? what does the JVM do in the meantime?
- Java VM - does the freed memory return to the OS?
- How does the C code that prints from 1 to 1000 without loops or conditional statements work?
- C# - What does the Assert() method do? Is it still useful?
- What does the c underscore expression `c_` do exactly?
- Why does the Sun JVM continue to consume ever more RSS memory even when the heap, etc sizes are stable?
- What does a JIT compiler do?
- What does the [[carries_dependency]] attribute mean?
- What does the C# CoClass attribute do?
- What is the best way to handle validation with different culture
- Where can I find a profiler for C# applications to be used in Visual Studio 2008? [closed]
- Is dealloc guaranteed to be called on the same thread that created the object?
- What does the keyword “where” in a class declaration do?
- How do I quiet the C compiler about a function pointer takes any number of arguments?
- Why does the c# compiler create a PrivateImplementationDetails from this code?
- What does the “strong” keyword do
- What is the C++/CLI equivalent to C#'s default(T)?
- In C++ How do references and pointers in parameters actually work? What are their set-in-stone protocol/“rule”?
- What does assigning a literal string to an NSString with “=” actually do?
- Why does the c++ regex_match function require the search string to be defined outside of the function?
- what does the -p and -g flag in compiler
- Why does the C++ compiler makes it possible to declare a function as constexpr, which can not be constexpr?
- What is the -D compiler flag C++ (clang, GNU, MSVC)
- What does the : do in a struct declaration after a member
- How to ensure that every method of a class calls some other method first?
- What does the “expand” option do in grunt-contrib-copy? The examples all use it but the docs say nothing about what...
- What is the C++03 memory model for concurrency?
- What does the class class [B represents in Java?
- What does the LEAL assembly instruction do?
- What does the 'void()' in 'auto f(params) -> decltype(…, void())' do?
- What does the “c” mean in cout, cin, cerr and clog?
- Why does the C# compiler insert an explicit interface implementation?
- what does the “-g” flag do in the command “npm install -g <something>”?
- What does the compiler do in assembly when optimizing code? ie -O2 flag
- How to ensure garbage collection of a FutureTask that is submitted to a ThreadPoolExecutor and then cancelled?
- How to ensure that data doesn't get corrupted when saving to file?
- What does the option “convert to web application” do if I select it in visual studio?
- How to ensure two different vectors are shuffled in the same order in C++?
- What does the * (asterisk) symbol do near a function argument and how to use that in others scenarios?
- How to hint to Visual C++ compiler optimizer that a specific branch of an if-statement is unlikely to be executed?
- Is write() safe to be called from multiple threads simultaneously?
- What does the FileDialog.RestoreDirectory Property actually do?
- What does adding Name and Namespace to DataContract do?
- What does the `ordered` flag do in a to-many relationship?
- How to ensure that std::thread are created in multi core?
- What does the “New … With” syntax do in VB Linq?
- Why does trivial loop in python run so much slower than the same in C++? And how to optimize that?
- What does the gcc -R parameter do?
- What does the C++ language standard say about how static_cast handles reducing the size of an integer?
- What does the “|” in “int style = SWT.APPLICATION_MODAL | SWT.OK;” do (and how to Google it)?
- What does the C++ compiler do when coming ambiguous default parameters?
- What does the “private” modifier do?
- What does the term “vendoring” or “to vendor” mean for Ruby on Rails?
- What Scala feature allows the plus operator to be used on Any?
- What is the rationale in allowing `?` to be escaped?
- Will the c++ compiler optimize away unused return value?
- What does the unary operator “-” do on unsigned data types in C/C++ (and on different compilers)?
- What does the using directive do, exactly?
- Why does my C++ compiler allow recursive calls to main?
- What does the new() constraint do on a class definition?
- Should std::move be used on members when initializing them in the constructor?
- in C++, how to use a singleton to ensure that each class has a unique integral ID?
- C++ DLL to be used in C program
- Objective C, How to make a active view to be appeared on the top notification menu
- What is the C++ memory layout of objects/structs etc?
- What does the const specifier do, before a pointer to object?
- Does EPPlus require Excel to be installed on the sever?
- what does the little arrow -> do in the ivy dependency section?
- What does “The template arguments of a specialization are deduced from the arguments of the primary template” mean?
- C++11 static_assert (and functions to be used therein)
- Im trying to use OpenGL with the windows API on different threads
- What does “The field xxx is never used” mean? [closed]
- Can EnableRaisingEvents be used on a process that is already running at the time my application starts?
- How to edit SIM800l library to ensure that a call is established
- HAML - what does the “!=” operator do?
- What does ::(member method name) do in c++
- What does the C++ standard mean regarding object lifetime begins?
- what does the - operator do with char *?
- Why does the compiler match “char” to “int” but not “short”?
- What's the right statistic for iOS Memory footprint. Live Bytes? Real Memory? Other?
- What does before_action returning false do in Rails 4?
- Does the MMU mediate everything between the operating system and physical memory or is it just an address translator?
- What does the delayed() function do (when used with joblib in Python)
- What does the word “Action” do in a Scala function definition using the Play framework?
- What is the modern, correct way to do type punning in C++?
- Ruby on Rails: what does the => symbol mean?
- What does this C++11 code (memoize) do?
- Does the C# compiler get the Color Color rule wrong with const type members?
- Where does my C++ compiler look to resolve my #includes?
- What does the pointer 'this+1' refer to in C++?
- What does the j function in Rails do?
- Why does the lock object have to be readonly?
- What does “do { … } while (0)” do exactly in kernel code?
- How does a C++ compiler compile variable names? [closed]
- What is the accepted pattern for an application that can be run as a service or as a console application
- How do I export a public key <SecKey> that was generated using SecKeyGeneratePair to be used on a server?
- Does the C++ standard mandate that C-linkage functions are `noexcept`?
- What does the “&=” in this C# code do?
- iphone app - how to get the current location only once and store that to be used in another function?
- How to ensure that we read all lines from boost::child process
- I want to flash an UIImageview on the iPad, how do I do that?
- How to ensure that a std::map is ordered?
- Does the .dispose() method do anything at all?
- Does the C++ standard guarantee that std::uintmax_t can hold all values of std::size_t?
- How to create a custom LayoutParams to be used on a custom layout?
- What's the C library function to generate random string?
- What does the “new ” keyword in .net actually do?
- What does the colon do in this struct definition?
- Pass List as XElement to be used as XML Datatype parameter
- Does QMutex need to be static so other threads calls of this class instance know to suspend their operations?
- Finding authorization framework to be used on a ASP.NET MVC project
- What is the most efficient way to recalculate attributes of a Boost Spirit parse with a different symbol table?
- how to overload == operator to allow it to be used in multiple comparisons?
- does the timer thread wait till all the steps in the callback function are done or does the callback function get...
- What does the “head mismatch” compiler error mean?
- In OpenCL, what does mem_fence() do, as opposed to barrier()?
- Why are some objects not accessible from different threads?
- How to get a task NOT to be executed on the UI thread
- What does “there is no smaller array object that satisfies these constraints” mean?
- What exactly does the C Structure Dot Operator Do (Lower Level Perspective)?
- What does a C cast really do?
- Rails - include module into controller, to be used in the view
- “COM object that has been separated from its underlying RCW cannot be used” with .NET 4.0
- How to specify a specific NIC to be used in an application written in c++ (boost asio)
- Is it possible to invoke subscribers's OnNexts on different threads in Rx?
- Does the endianness affect how structure members are stored into the memory
- What does the * CSS operator do? Are there any other CSS operators?
- Does a C# method need to be pinned when used as Win32 callback?
- How do I ensure that duplicate rows are not added to my database table via activerecords?
- What does the “mount” instruction mean in Rails routing?
- what is the difference in defining the 'byte' in terms of computer memory and in terms of C++?
- What is the C++ equivalent of an 'allocated object having no declared type' in C?
- Does the C++ specification say how types are chosen in the static_cast/const_cast chain to be used in a C-style cast?
- How to manage parsing an null object for DateTime to be used with ADO.NET as DBNULL
- What does "The indexes PRIMARY and id seem to be equal and one of them could possibly be removed." mean?
- Why does the C++ compiler give errors after lines instead of on them?
- What does assignment to *this do (*this = val)?
- How do I ensure that objects are disposed of properly in .NET?
- How to get the C# compiler to infer generic types?
- How to create a dynamic 'contains or LIKE' Expression to be used with Linq against OData service
- Using Application.Run() on different threads
- Why does the VC++ compiler MOV+PUSH args instead of just PUSH them? x86
- What does the # operator do in macros?
- What does the /TSAWARE linker flag do to the PE executable?
- Should safe pointers be used in strategy pattern?
- What does this C code do?
- Helper methods to be used in Controllers AND Views in Rails
- In a Visual Studio 2010 C/C++, what does the "Rescan Solution" operation do?
- What does the @GLIBC_2.2.5 suffix on symbols do?
- What points to be used for Drawing Hexagonal Shaped Button
- What does the initialKey parameter do in the Pager constructor
- Is a C++ compiler allowed to emit random code once it encounters a construct that is classified as undefined...
- What does the term "empty loop" refer to exactly in C and C++?
- How to ensure that database cleanup is always performed after a test?
- Where is the C compiler located on disk for Visual C++ 2008 Express?
- Does the C++ standard force capture-by-reference of local variables to be inefficient?
- Does the C++ standard specify STL implementation details for the compiler?
- Force a specific localization to be used for a target
- What does the CookieAuthenticationOptions.LogoutPath property do in ASP.NET Core 2.1?
- What does the const operator mean when used with a method in C++?
- What does the C# compiler mean when it prints "an explicit conversion exists"?
- What does a C# for loop do when all the expressions are missing. eg for(;;) {}
- Can lock and monitor be used on same object safely?
- boost::shared_ptr is it safe to use it in multiple threads?
- Does the C# compiler optimize foreach blocks when its contents have the Conditional attribute?
- How does the C == operator decide whether or not two floating point values are equal?
- c++; What does the warning "enabled by default" mean during compile?
- Why does the post method seem to be clearing my rails session data?
- How full does the old generation have to be to trigger a major GC cycle?
- What requirements are necessary and sufficient for an ActiveX control to be used directly on an Excel worksheet?
- What does the ^ character mean when used in C++ declarations?
- What does the "double" do in ceil(double)?
- Why the C++ compiler does not give precedence (increment operator under assignment) in this simple program?
- What does the [Serializable] attribute do that ISerializable doesn't?
- better way to ensure that a string contains only alphanumeric characters?
- What's the difference between shared memory for IPCs and threads' shared memory?
- Why is the size of my class zero? How can I ensure that different objects have different address?
- How do I stop the C# compiler output from wrapping in the Visual Studio 2015 output window?
- Rx produce and consume on different threads
- What does the parameter formattingEnabled do in Binding's constructor?
- Merging two iqueryables that are projected to one entity from different tables
- What is the best way to enforce properties that must be implemented at each subclass in *different* fields?
- Location of scanf function family in VC runtime 2017 to be used in MinGW 7
- What is the most effective way to delete entites that satisfy a condition from a database?
- Memory: how does the compiler choose where to store variables?
- Does the C++ compiler generate "this" pointer for all member methods, or only for those who reference members?
- What does a C++ preprocessor do when there's just a single `#` in a line - and nothing else?
- Android Studio - Rotating device causes more and more memory to be used
- WMI Exception: "COM object that has been separated from its underlying RCW cannot be used"
Only authorized users can answer the Search term. Please sign in first, or register a free account.
this is hardware-dependent. on hardware i am familiar with, c++ doesn't have to do anything special, because from hardware perspective accessing different bytes even on a cached line is handled 'transparently'. from the hardware, this situation is not really different from
in the cases above, we are talking about two adjacent objects, which are guaranteed to be independently accessible.
however, i've put 'transparently' in quotes for a reason. when you really have a case like that, you could be suffering (performance-wise) from a 'false sharing' - which happens when two (or more) threads access adjacent memory simultaneously and it ends up being cached in several cpu's caches. this leads to constant cache invalidation. in the real life, care should be taken to prevent this from happening when possible.