No. Check out PPL or Intel TBB for thread safe STL-like containers. Like others have noted they have usual "multiple reader thread safety" but that is even pre C++11. Ofc this doesnt mean single writer multiple readers.
Full Answer
Are C functions thread-safe?
The standard C printf() and scanf() functions use stdio so they are thread-safe. The standard C printf() function is susceptible to changes in the locale settings if called in a multithreaded program.
Are C++ STL containers thread-safe?
The SGI implementation of STL is thread-safe only in the sense that simultaneous accesses to distinct containers are safe, and simultaneous read accesses to to shared containers are safe.
What does thread-safe mean C?
Thread safety is the avoidance of data races—situations in which data are set to either correct or incorrect values, depending upon the order in which multiple threads access and modify the data.
Are std :: vectors thread-safe?
const and Thread Safety The C++11 standard does not expect to be able to safely call non const functions simultaneously. Therefore all classes available from the standard, e.g. std::vector<>, can safely be accessed from multiple threads in the same manner.
Is Docker single threaded?
Think of a Docker container as a lightweight isolated environment, akin to a virtual environment, where you can run a program/service. This service can run multiple threads, all launched from the parent program - it is still one service running on a single Docker container.
Which C functions are not thread-safe?
C library functions that are not thread-safeasctime() ,localtime() ,strtok()
Is C single threaded?
C is a language that runs on one thread by default, which means that the code will only run one instruction at a time.
Does C have thread?
Each part of such a program is called a thread, and each thread defines a separate path of execution. C does not contain any built-in support for multithreaded applications. Instead, it relies entirely upon the operating system to provide this feature.
How do I know if a code is thread-safe?
How do we know if code is thread-safe? We can tell that code is thread-safe if it only uses and updates shared resources in a way that guarantees safe execution by multiple threads at the same time. Shared resources can be a counter variable, an array, or anything else.
Do threads get their own PID?
In Linux, each thread has a pid, and that's what htop shows. The “process” to which all the threads belong is the thread whose pid matches its thread group id. In your case, grep Tgid /proc/1021/status would show the value 1019 (and this would be true for all the rg identifiers shown by htop ).
Is clone thread-safe?
No it is not thread safe if two threads are trying to execute this method over the same instance of Foo. You should create a mutex using this instance . For example place the code which executes this clone method in synchronized(fooInstance) block.
Is Size () thread-safe?
No, they're not thread-safe. The standard containers are simply not thread-safe, period. There is however a limited amount of thread safety: If every thread accesses a different element, and no element is accessed by two distinct threads at any given time, then that's fine.
Are C++ sets thread-safe?
None of the STL containers is thread safe, so std::set in particular isn't. In your case, the issue isn't even really thread safety, though: You simply share an object across multiple threads (fine) and modify it in one thread (fine as well).
Does C++ have a thread-safe queue?
The C++ thread safe queue allows to use the queue by multiple thread in multi-threaded code. The thread safe queue is not a built-in method or class in C++; it can be implemented with the help of built-in STL libraries.
Are C++ streams thread-safe?
The synchronized stream objects ( cin / cout / cerr , assuming you haven't called sync_with_stdio(false); ) are thread safe to the extent that you can read/write from multiple threads without causing a crash.
Is C++ new thread-safe?
The C++ new and delete operators are thread safe, but this means that a thread may have to wait for a lock on these operations. Once memory is obtained for a thread, the thread_alloc memory allocator keeps that memory available for the thread so that it can be re-used without waiting for a lock.
What does "multiple reader thread safety" mean?
Like others have noted they have usual "multiple reader thread safety" but that is even pre C++11. Ofc this doesnt mean single writer multiple readers . It means 0 writers.
How many threads can a global std::vector have?
i.e. it's safe to access distinct elements of the same container, so for example you can have a global std::vector<std::future<int>> of ten elements and have ten threads which each write to a different element of the vector.
How many threads can a vector have?
i.e. it's safe to access distinct elements of the same container, so for example you can have a global std::vector<std::future<int>>of ten elements and have ten threads which each write to a different element of the vector.
Is thread safety useless?
Thread safety at the level of container access is often useless as you want to write things like "cash[i] = cash[i] + total" and the locking needs to be at a higher level than on the container itsself.
Can a container be called safely?
Apart from that, the same rules apply to containers as for the rest of the standard library (see 17.6.5.9 [res.on.data.races]), as Mr.C64's answersays, and additionally [container.requirements.dataraces] lists some non-const member functions of containers that can be called safely because they only return non-const references to elements, they don't actually modify anything (in general any non-const member function must be considered a modification.)
What is a container library?
The Containers library is a generic collection of class templates and algorithms that allow programmers to easily implement common data structures like queues, lists and stacks. There are three classes of containers -- sequence containers, associative containers, and unordered associative containers -- each of which is designed to support a different set of operations.
Can different elements in the same container be modified concurrently?
Different elements in the same container can be modified concurrently by different threads, except for the elements of std::vector<bool> (for example, a vector of std::future objects can be receiving values from multiple threads).
How many years is C++14?
Those are two most recent revisions of the C++ language standard, the document that describes the language and its standard library. C++14 is 3 years newer, and includes a bunch of new features that C++11 didn't include.
Can const call concurrently?
Some operations are thread-safe, some aren't. All container functions can be called concurrently by different threads on different containers. All const member functions can be called concurrently by different threads on the same container.
Can you use C++11 instead of C++14?
However, most programs in a subset of C11 could be compiled by a C++11 compiler. But they generally are not idiomatic in C++11 (e.g. you should use smart pointers, not raw pointers in C++11). BTW, you’ll better use C++14 or C++17 instead of C++11.
Can a container be parallelized internally?
In any case, container operations (as well as algorithms, or any other C++ standard library functions) may be parallelized internally as long as this does not change the user-visible results.
Can different elements in the same container be modified concurrently?
Different elements in the same container can be modified concurrently by different threads, except for the elements of std::vector<bool> (for example, a vector of std::future objects can be receiving values from multiple threads).
Is singleton a thread safe C++?
Singletons are generally regarded as an anti-pattern, see for example C++ Core Guidelines I.3: Avoid Singletons. But as an exercise, the thread-safe C++ singleton class goes like this: class Singleton {. Singleton () {}. Singleton (const Singleton&) = delete;
What is thread synchronization?
Threads synchronization is a common task in multithreading applications. You cannot get away without some form of protecting the data that is accessed from multiple threads. Some of the concepts of protecting data are mutexes and atomic variables, and they are common for programming languages that support multithreading.
When iterating a channel, should the loop be blocking?
Also, when iterating a channel, the loop should be blocking. When the last element is read, the loop will block the thread until new elements are being pushed. Of course, you can break the loop anytime you want. Other operations you may need are regarding the number of elements currently in the channel. 1.
Can pushing be made by copy?
For small data, pushing can be made by copy, but some elements could be too large and you’ll want to move them into the channel:
