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/* mempool.c: pooled system memory
Copyright (c) 2008-2016 Philip Kendall
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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include <config.h>
#include <string.h>
#ifdef HAVE_LIB_GLIB
#include <glib.h>
#endif /* #ifdef HAVE_LIB_GLIB */
#include <libspectrum.h>
#include "fuse.h"
#include "infrastructure/startup_manager.h"
#include "mempool.h"
static GArray *memory_pools;
const int MEMPOOL_UNTRACKED = -1;
static int
mempool_init( void *context )
{
memory_pools = g_array_new( FALSE, FALSE, sizeof( GArray* ) );
return 0;
}
int
mempool_register_pool( void )
{
GArray *pool = g_array_new( FALSE, FALSE, sizeof( void* ) );
g_array_append_val( memory_pools, pool );
return memory_pools->len - 1;
}
void*
mempool_malloc( int pool, size_t size )
{
void *ptr;
if( pool == MEMPOOL_UNTRACKED ) return libspectrum_malloc( size );
if( pool < 0 || pool >= memory_pools->len ) return NULL;
ptr = libspectrum_malloc( size );
if( !ptr ) return NULL;
g_array_append_val( g_array_index( memory_pools, GArray*, pool ), ptr );
return ptr;
}
void *
mempool_malloc_n( int pool, size_t nmemb, size_t size )
{
void *ptr;
if( pool == MEMPOOL_UNTRACKED ) return libspectrum_malloc_n( nmemb, size );
if( pool < 0 || pool >= memory_pools->len ) return NULL;
ptr = libspectrum_malloc_n( nmemb, size );
if( !ptr ) return NULL;
g_array_append_val( g_array_index( memory_pools, GArray*, pool ), ptr );
return ptr;
}
char*
mempool_strdup( int pool, const char *string )
{
size_t length = strlen( string ) + 1;
char *ptr = mempool_malloc( pool, length );
if( !ptr ) return NULL;
memcpy( ptr, string, length );
return ptr;
}
void
mempool_free( int pool )
{
size_t i;
GArray *p = g_array_index( memory_pools, GArray*, pool );
for( i = 0; i < p->len; i++ )
libspectrum_free( g_array_index( p, void*, i ) );
g_array_set_size( p, 0 );
}
/* Tidy-up function called at end of emulation */
static void
mempool_end( void )
{
int i;
GArray *pool;
if( !memory_pools ) return;
for( i = 0; i < memory_pools->len; i++ ) {
pool = g_array_index( memory_pools, GArray *, i );
g_array_free( pool, TRUE );
}
g_array_free( memory_pools, TRUE );
memory_pools = NULL;
}
void
mempool_register_startup( void )
{
startup_manager_module dependencies[] = { STARTUP_MANAGER_MODULE_SETUID };
startup_manager_register( STARTUP_MANAGER_MODULE_MEMPOOL, dependencies,
ARRAY_SIZE( dependencies ), mempool_init, NULL,
mempool_end );
}
/* Unit test helper routines */
int
mempool_get_pools( void )
{
return memory_pools->len;
}
int
mempool_get_pool_size( int pool )
{
return g_array_index( memory_pools, GArray*, pool )->len;
}
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