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Can't get started: "no such file"...

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Join Date: Nov 2007

Posts: 22

Reputation: pocku is an unknown quantity at this point

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pocku

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Newbie Poster

Can't get started: "no such file"...

Oct 13th, 2009

The codes our instructor provided for us has been giving me a "no such file" error message for the line #include <mutex.h> in the following code:

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/*
 *  mutex.cpp
 *  scheduling
 *
 */
 
#include <mutex.h>
 
Mutex::Mutex()
{
 
}
 
Mutex::~Mutex()
{
 
}
 
int Mutex::Lock()
{
 
}
 
int Mutex::Unlock()
{
 
}
/*
 *  mutex.cpp
 *  scheduling
 *
 */

#include <mutex.h>

Mutex::Mutex()
{

}

Mutex::~Mutex()
{

}

int Mutex::Lock()
{

}

int Mutex::Unlock()
{

}

The mutex.h code it is referring to is here:

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/*
 *  mutex.h
 *  scheduling
 *
 */
 
#ifndef MUTEX_H
#define MUTEX_H
 
#include<pthread.h>
 
class Mutex
{
private:
    pthread_mutex_t mutex;
 
public:   
    /** Initializing the mutex
     */
    Mutex();
 
    /** Destroy the mutex
     */
    ~Mutex();
 
    /** Acquire the lock
     * @return The return value of pthread_mutex_lock().
     */
    int Lock();
 
    /** Release the lock
     * @return The return value of pthread_mutex_unlock().
     */
    int Unlock();
};
#endif
/*
 *  mutex.h
 *  scheduling
 *
 */

#ifndef MUTEX_H
#define MUTEX_H

#include<pthread.h>

class Mutex
{
private:
    pthread_mutex_t mutex;
    
public:   
    /** Initializing the mutex
     */
    Mutex();
    
    /** Destroy the mutex
     */
    ~Mutex();
    
    /** Acquire the lock
     * @return The return value of pthread_mutex_lock().
     */
    int Lock();
    
    /** Release the lock
     * @return The return value of pthread_mutex_unlock().
     */
    int Unlock();
};
#endif

I've double checked and both codes are in the same directory and just in case you need to know, I am using Eclipse C/C++ and MinGW. Hopefully someone can help me out here so I can actually get started on this assignment!

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Join Date: Sep 2009

Posts: 357

Reputation: dkalita will become famous soon enough

Solved Threads: 55

dkalita

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Posting Whiz

Oct 13th, 2009

when u include a file in <> brace like follows

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#include <mutex.h>

it looks in the include directory.
But your file mutex.h is in your current directory. To include such file u have to do it using ""

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#include "mutex.h"

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Join Date: Nov 2007

Posts: 22

Reputation: pocku is an unknown quantity at this point

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pocku

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Newbie Poster

Oct 13th, 2009

That sort of worked.... mutex.cpp doesn't have an error anymore but now I have an error message in mutex.h saying:

`pthread_mutex_t' does not name a type (on line 15)

as well as

pthread.h: no such file

Also, I forgot to mention that a Makefile is included with the codes as well but I don't know how to use it within Eclipse to build the codes. Do I need this Makefile or can I just build everything using eclipse?

Last edited by pocku; Oct 13th, 2009 at 3:16 am.

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Join Date: Dec 2008

Posts: 1,356

Reputation: firstPerson is just really nice

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firstPerson firstPerson is offline

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Nearly a Posting Virtuoso

Oct 13th, 2009

How about you just ask your teacher since it will be easier and more straight forward.

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Join Date: Sep 2009

Posts: 357

Reputation: dkalita will become famous soon enough

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dkalita

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Posting Whiz

Oct 13th, 2009

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Originally Posted by pocku

pthread.h: no such file

pthread.h is generally for POSIX systems like FreeBSD, NetBSD, GNU/Linux, Mac OS X and Solaris, but Microsoft Windows implementations also exist. For example, the pthreads-w32 is available and supports a subset of the Pthread API for the Windows 32-bit platform.

If you are working in windows it wont work. U have to look for
pthreads-w32 .

checkout the link
http://en.wikipedia.org/wiki/POSIX_Threads

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Join Date: Nov 2007

Posts: 22

Reputation: pocku is an unknown quantity at this point

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pocku

Offline

Newbie Poster

Oct 13th, 2009

•

Originally Posted by dkalita

pthread.h is generally for POSIX systems like FreeBSD, NetBSD, GNU/Linux, Mac OS X and Solaris, but Microsoft Windows implementations also exist. For example, the pthreads-w32 is available and supports a subset of the Pthread API for the Windows 32-bit platform.

If you are working in windows it wont work. U have to look for
pthreads-w32 .

checkout the link
http://en.wikipedia.org/wiki/POSIX_Threads

Thanks for pointing that out. I tired compiling it on my school's Linux computer and there wasn't a problem. I'm not sure whether our instructor is okay with us using pthreads-w32 so I'll have to ask her about that...

Also, this is for another assignment but what about arpa/inet.h or sys/socket.h? Are those also only supported by unix-like systems?

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