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I get linking errors when I use atomic functions in code. How could I solve it?

Pavol Rapáč

Hello,

I include <atomic>

I use functions test_and_set() and clear().

Programming language C++14 and my compiler is armclang 6.18 I get the errors:

Some recommendations or suggestions?

Thank you in advance

Parents
  • 0 in reply to Ronan Synnott

    I don't use any special compiler or linker flags regarding the atomic library. I use it in code like this:

    header file:

    #include <atomic>

    namespace some_namespace
    {
    class SomeClass
    {
    public:
        SomeClass(std::atomic_flag* ExclusiveOperation = nullptr)
        : exclusiveOperation(ExclusiveOperation)
        {}

        void someFunction(void);
    private:
        void anotherFunction(void);
        std::atomic_flag* const exclusiveOperation{nullptr};
    };
    }

    cpp file that implements class functions:

    #include "header_file.hpp"

    namespace some_namespace
    {
    void SomeClass::someFunction(void)
    {
        if(exclusiveOperation != nullptr && exclusiveOperation->test_and_set())
        {}
    }

    void SomeClass::anotherFunction(void)
    {
        if(exclusiveOperation != nullptr)

        {

            exclusiveOperation->clear();

        }

    }

    cpp file where class instance is created:

    #include "header_file.hpp"

    std::atomic_flag exclusiveOperation = ATOMIC_FLAG_INIT;
    SomeClass someClassInstance(&exclusiveOperation);

Reply
  • 0 in reply to Ronan Synnott

    I don't use any special compiler or linker flags regarding the atomic library. I use it in code like this:

    header file:

    #include <atomic>

    namespace some_namespace
    {
    class SomeClass
    {
    public:
        SomeClass(std::atomic_flag* ExclusiveOperation = nullptr)
        : exclusiveOperation(ExclusiveOperation)
        {}

        void someFunction(void);
    private:
        void anotherFunction(void);
        std::atomic_flag* const exclusiveOperation{nullptr};
    };
    }

    cpp file that implements class functions:

    #include "header_file.hpp"

    namespace some_namespace
    {
    void SomeClass::someFunction(void)
    {
        if(exclusiveOperation != nullptr && exclusiveOperation->test_and_set())
        {}
    }

    void SomeClass::anotherFunction(void)
    {
        if(exclusiveOperation != nullptr)

        {

            exclusiveOperation->clear();

        }

    }

    cpp file where class instance is created:

    #include "header_file.hpp"

    std::atomic_flag exclusiveOperation = ATOMIC_FLAG_INIT;
    SomeClass someClassInstance(&exclusiveOperation);

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