Ошибка c2011 timespec переопределение типа struct

While executing a Pthread program in C using Visual Studio 2015, I got the following error:

Error C2011 ‘timespec’: ‘struct’ type redefinition

The following is my code:

#include<pthread.h>
#include<stdlib.h>
#include<stdio.h>


void *calculator(void *parameter);

int main(/*int *argc,char *argv[]*/)
{
    pthread_t thread_obj;
    pthread_attr_t thread_attr;
    char *First_string = "abc"/*argv[1]*/;
    pthread_attr_init(&thread_attr);
    pthread_create(&thread_obj,&thread_attr,calculator,First_string);
        
}
void *calculator(void *parameter)
{
    int x=atoi((char*)parameter);
    printf("x=%d", x);
}

Despite this question is already answered correctly, there is also another way to solve this problem.

First, problem occurs because pthreads-win32 internally includes time.h which already declares timespec struct.

To avoid this error the only thing we should do is this:

#define HAVE_STRUCT_TIMESPEC
#include <pthread.h>

answered Apr 7, 2018 at 8:15

The same problem happens when compiling programs in Visual Studio 2015 that include MariaDB 10 header files (saw it with 10.1.14).

The solution there is to define the following:

STRUCT_TIMESPEC_HAS_TV_SEC
STRUCT_TIMESPEC_HAS_TV_NSEC

answered Jun 3, 2016 at 8:36

On Visual Studio 2015.

I solve the problem adding:

#define _TIMESPEC_DEFINED

answered Nov 8, 2019 at 4:01

Everything was working well untill I moved some code from the main file to a new class, then I had the following error:

error C2011: ‘color1’ : ‘struct’ type redefinition

struct color1
{
    color1()
    {
        red = green = blue = 0;
    }

    color1(float _red, float _green, float _blue)
    {
        red = _red;
        green = _green;
        blue = _blue;
    }

    float red, green, blue;
};

Any idea ?

asked Apr 28, 2011 at 21:12

You can have the definition of the structure on a header file.
Have

 #pragma once

at the beginning of the header where the struct is defined, it solves the problem.

answered Nov 2, 2016 at 18:54

I had the same problem and luckily did not take long figure out that it was just a silly mistake.

The thing was that I had a backup of my project at another drive (D:) but all the code was set on the drive C: when explicitly defined the full path. I created it on the C: path and was always using that way, but accidentally opened the project from the D and thought that it was the same thing, so at compile it was including twice because in some cases it was including the code from the C: path and at others from the D: path.

answered Oct 7, 2019 at 13:07

I had the same problem too, and it turned out that I made a mistake with my header guard. For example, instead of writing:

#ifndef COMMAND_H
#define COMMAND_H

// My code

#endif // COMMAND_H

I made a little and hard to recognize typo:

#ifndef COMNAND_H
#define COMMAND_H

// My code

#endif // COMMAND_H

That is, COMNAND_H not COMMAND_H. It should be the letter M rather than the letter N. I fixed that and everything was fine. Hope this answer help you with your case!!!

answered Jun 17, 2021 at 8:19

Everything was working well untill I moved some code from the main file to a new class, then I had the following error:

error C2011: ‘color1’ : ‘struct’ type redefinition

struct color1
{
    color1()
    {
        red = green = blue = 0;
    }

    color1(float _red, float _green, float _blue)
    {
        red = _red;
        green = _green;
        blue = _blue;
    }

    float red, green, blue;
};

Any idea ?

asked Apr 28, 2011 at 21:12

You can have the definition of the structure on a header file.
Have

 #pragma once

at the beginning of the header where the struct is defined, it solves the problem.

answered Nov 2, 2016 at 18:54

I had the same problem and luckily did not take long figure out that it was just a silly mistake.

The thing was that I had a backup of my project at another drive (D:) but all the code was set on the drive C: when explicitly defined the full path. I created it on the C: path and was always using that way, but accidentally opened the project from the D and thought that it was the same thing, so at compile it was including twice because in some cases it was including the code from the C: path and at others from the D: path.

answered Oct 7, 2019 at 13:07

I had the same problem too, and it turned out that I made a mistake with my header guard. For example, instead of writing:

#ifndef COMMAND_H
#define COMMAND_H

// My code

#endif // COMMAND_H

I made a little and hard to recognize typo:

#ifndef COMNAND_H
#define COMMAND_H

// My code

#endif // COMMAND_H

That is, COMNAND_H not COMMAND_H. It should be the letter M rather than the letter N. I fixed that and everything was fine. Hope this answer help you with your case!!!

answered Jun 17, 2021 at 8:19