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/*
FALCON - The Falcon Programming Language.
FILE: flc_memory.cpp
Basic memory manager functions and function pointers.
-------------------------------------------------------------------
Author: Giancarlo Niccolai
Begin: 2004-08-01
-------------------------------------------------------------------
(C) Copyright 2004: the FALCON developers (see list in AUTHORS file)
See LICENSE file for licensing details.
*/
#include <falcon/memory.h>
#if defined(__SUNPRO_CC)
#include <stdio.h>
#elif defined(__BORLANDC__)
#include <stdio.h>
#include <stdlib.h>
#else
#include <cstdio>
#include <cstdlib>
#endif
#ifdef FALCON_SYSTEM_WIN
#include <falcon/mt_win.h>
#else
#include <falcon/mt_posix.h>
#endif
namespace Falcon {
/*
#ifdef _MSC_VER
const builder_t Builder;
#else
const builder_t Builder = {};
#endif
*/
void * DflMemAlloc( size_t amount )
{
void *ret = malloc( amount + sizeof(size_t) );
if ( ret == 0 ) {
printf( "Falcon: fatal allocation error when allocating %d bytes\n", (int) amount );
exit(1);
}
return ret;
}
void DflMemFree( void *mem )
{
free( mem );
}
void * DflMemRealloc( void *mem, size_t amount )
{
void *ret = realloc( mem, amount );
if ( ret == 0 && amount != 0 ) {
printf( "Falcon: fatal reallocation error when allocating %d bytes\n", (int) amount );
exit(1);
}
return ret;
}
void * DflAccountMemAlloc( size_t amount )
{
size_t *ret = (size_t*) malloc( amount + sizeof(size_t) );
if ( ret == 0 ) {
printf( "Falcon: fatal allocation error when allocating %d bytes\n", (int) amount );
exit(1);
}
gcMemAccount( amount );
*ret = amount;
return ret+1;
}
void DflAccountMemFree( void *mem )
{
if ( mem != 0 )
{
size_t *smem = (size_t*) mem;
gcMemUnaccount( smem[-1] );
free( smem-1 );
}
}
void * DflAccountMemRealloc( void *mem, size_t amount )
{
if ( amount == 0 )
{
DflAccountMemFree( mem );
return 0;
}
if ( mem == 0 )
return DflAccountMemAlloc( amount );
size_t *smem = (size_t*) mem;
smem--;
size_t oldalloc = *smem;
size_t *nsmem = (size_t*) realloc( smem, amount + sizeof( size_t ) );
if ( nsmem == 0 ) {
printf( "Falcon: fatal reallocation error when allocating %d bytes\n", (int) amount );
exit(1);
}
*nsmem = amount;
if( amount > oldalloc )
gcMemAccount( amount - oldalloc );
else
gcMemUnaccount( oldalloc - amount );
return nsmem+1;
}
//===================================================================================
// Account functions
//
static Mutex *s_gcMutex = 0;
static size_t s_allocatedMem = 0;
void gcMemAccount( size_t mem )
{
if( s_gcMutex == 0 )
s_gcMutex = new Mutex;
s_gcMutex->lock();
s_allocatedMem += mem;
s_gcMutex->unlock();
}
void gcMemUnaccount( size_t mem )
{
if( s_gcMutex == 0 )
s_gcMutex = new Mutex;
s_gcMutex->lock();
s_allocatedMem -= mem;
s_gcMutex->unlock();
}
size_t gcMemAllocated()
{
if( s_gcMutex == 0 )
s_gcMutex = new Mutex;
s_gcMutex->lock();
register uint32 val = s_allocatedMem;
s_gcMutex->unlock();
return val;
}
void gcMemShutdown()
{
delete s_gcMutex;
s_gcMutex = 0;
}
//============================================================
// Global function pointers.
//
void * (*gcAlloc) ( size_t ) = DflAccountMemAlloc;
void (*gcFree) ( void * ) = DflAccountMemFree;
void * (*gcRealloc) ( void *, size_t ) = DflAccountMemRealloc;
/*
void * (*memAlloc) ( size_t ) = DflMemAlloc;
void (*memFree) ( void * ) = DflMemFree;
void * (*memRealloc) ( void *, size_t ) = DflMemRealloc;
*/
/*
In phase 1, we're accounting everything to verify the basic solidity of our GC system.
*/
void * (*memAlloc) ( size_t ) = DflAccountMemAlloc;
void (*memFree) ( void * ) = DflAccountMemFree;
void * (*memRealloc) ( void *, size_t ) = DflAccountMemRealloc;
}
/* end of flc_memory.cpp */
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