postal/mutex.cpp at main · simta/postal · GitHub

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#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include "postal.h"
#include "mutex.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

Mutex::Mutex( bool
#ifdef LINUX_PTHREAD
              fastMutex
#endif
              )
{
    int rc;

#ifdef LINUX_PTHREAD
    if ( !fastMutex ) {
        pthread_mutexattr_t attr;
        pthread_mutexattr_init( &attr );
        rc = pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE_NP );
        if ( !rc ) {
            rc = pthread_mutex_init( &m_mut, &attr );
        }
        pthread_mutexattr_destroy( &attr );
    }else
#endif
    {
        rc = pthread_mutex_init( &m_mut, NULL );
    }
    if ( rc ) {
        fprintf( stderr, "Can't create mutex.\n" );
        exit( 1 );
    }
}

Mutex::~Mutex( )
{
    pthread_mutex_destroy( &m_mut );
}

int
Mutex::get_mutex( bool block )
{
    if ( block ) {
        if ( pthread_mutex_lock( &m_mut )) {
            return( -1 );
        }
    }else  {
        if ( pthread_mutex_trylock( &m_mut )) {
            return( -1 );
        }
    }
    return( 0 );
}

int
Mutex::put_mutex( )
{
    if ( pthread_mutex_unlock( &m_mut )) {
        return( -1 );
    }
    return( 0 );
}

Lock::Lock( Mutex &mut )
    : m_mut( mut )
{
    if ( m_mut.get_mutex( )) {
        perror( "" );
        fprintf( stderr, "Can't lock mutex.\n" );
        exit( 1 );
    }
}

Lock::~Lock( )
{
    if ( m_mut.put_mutex( )) {
        fprintf( stderr, "Can't unlock mutex.\n" );
        exit( 1 );
    }
}