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/* Tarlz - Archiver with multimember lzip compression
Copyright (C) 2013-2024 Antonio Diaz Diaz.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _FILE_OFFSET_BITS 64
#include <pthread.h>
#include "tarlz.h"
#include "common_mutex.h"
namespace {
int error_status = 0;
} // end namespace
void xinit_mutex( pthread_mutex_t * const mutex )
{
const int errcode = pthread_mutex_init( mutex, 0 );
if( errcode )
{ show_error( "pthread_mutex_init", errcode ); exit_fail_mt(); }
}
void xinit_cond( pthread_cond_t * const cond )
{
const int errcode = pthread_cond_init( cond, 0 );
if( errcode )
{ show_error( "pthread_cond_init", errcode ); exit_fail_mt(); }
}
void xdestroy_mutex( pthread_mutex_t * const mutex )
{
const int errcode = pthread_mutex_destroy( mutex );
if( errcode )
{ show_error( "pthread_mutex_destroy", errcode ); exit_fail_mt(); }
}
void xdestroy_cond( pthread_cond_t * const cond )
{
const int errcode = pthread_cond_destroy( cond );
if( errcode )
{ show_error( "pthread_cond_destroy", errcode ); exit_fail_mt(); }
}
void xlock( pthread_mutex_t * const mutex )
{
const int errcode = pthread_mutex_lock( mutex );
if( errcode )
{ show_error( "pthread_mutex_lock", errcode ); exit_fail_mt(); }
}
void xunlock( pthread_mutex_t * const mutex )
{
const int errcode = pthread_mutex_unlock( mutex );
if( errcode )
{ show_error( "pthread_mutex_unlock", errcode ); exit_fail_mt(); }
}
void xwait( pthread_cond_t * const cond, pthread_mutex_t * const mutex )
{
const int errcode = pthread_cond_wait( cond, mutex );
if( errcode )
{ show_error( "pthread_cond_wait", errcode ); exit_fail_mt(); }
}
void xsignal( pthread_cond_t * const cond )
{
const int errcode = pthread_cond_signal( cond );
if( errcode )
{ show_error( "pthread_cond_signal", errcode ); exit_fail_mt(); }
}
void xbroadcast( pthread_cond_t * const cond )
{
const int errcode = pthread_cond_broadcast( cond );
if( errcode )
{ show_error( "pthread_cond_broadcast", errcode ); exit_fail_mt(); }
}
/* This can be called from any thread, main thread or sub-threads alike,
since they all call common helper functions that call exit_fail_mt()
in case of an error.
*/
void exit_fail_mt( const int retval )
{
// calling 'exit' more than once results in undefined behavior
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_lock( &mutex ); // ignore errors to avoid loop
std::exit( retval );
}
/* If msgp is null, print the message, else return the message in *msgp.
If prefix is already in the list, print nothing or return empty *msgp.
Return true if a message is printed or returned in *msgp. */
bool print_removed_prefix( const std::string & prefix,
std::string * const msgp )
{
// prevent two threads from modifying the list of prefixes at the same time
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static std::vector< std::string > prefixes; // list of prefixes
if( verbosity < 0 || prefix.empty() )
{ if( msgp ) msgp->clear(); return false; }
xlock( &mutex );
for( unsigned i = 0; i < prefixes.size(); ++i )
if( prefixes[i] == prefix )
{ xunlock( &mutex ); if( msgp ) msgp->clear(); return false; }
prefixes.push_back( prefix );
std::string msg( "Removing leading '" ); msg += prefix;
msg += "' from member names.";
if( msgp ) *msgp = msg; else show_error( msg.c_str() );
xunlock( &mutex ); // put here to prevent mixing calls to show_error
return true;
}
void set_error_status( const int retval )
{
// prevent two threads from modifying the error_status at the same time
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
xlock( &mutex );
if( error_status < retval ) error_status = retval;
xunlock( &mutex );
}
int final_exit_status( int retval, const bool show_msg )
{
if( retval == 0 && error_status )
{ if( show_msg )
show_error( "Exiting with failure status due to previous errors." );
retval = error_status; }
return retval;
}
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