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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "sci/include/sci_memory.h"
#include "common/util.h"
namespace Sci {
void * sci_malloc(size_t size) {
void *res;
ALLOC_MEM((res = malloc(size)), size, __FILE__, __LINE__, "")
return res;
}
void * sci_calloc(size_t num, size_t size) {
void *res;
ALLOC_MEM((res = calloc(num, size)), num * size, __FILE__, __LINE__, "")
return res;
}
void *sci_realloc(void *ptr, size_t size) {
void *res;
ALLOC_MEM((res = realloc(ptr, size)), size, __FILE__, __LINE__, "")
return res;
}
char *sci_strdup(const char *src) {
void *res;
if (!src) {
fprintf(stderr, "_SCI_STRDUP() [%s (%s) : %u]\n",
__FILE__, "", __LINE__);
fprintf(stderr, " attempt to strdup NULL pointer\n");
BREAKPOINT();
}
ALLOC_MEM((res = strdup(src)), strlen(src), __FILE__, __LINE__, "")
return (char*)res;
}
char *sci_strndup(const char *src, size_t length) {
void *res;
char *strres;
size_t rlen = (int)MIN(strlen(src), length) + 1;
if (!src) {
fprintf(stderr, "_SCI_STRNDUP() [%s (%s) : %u]\n",
__FILE__, "", __LINE__);
fprintf(stderr, " attempt to strndup NULL pointer\n");
BREAKPOINT();
}
ALLOC_MEM((res = malloc(rlen)), rlen, __FILE__, __LINE__, "")
strres = (char *)res;
strncpy(strres, src, rlen);
strres[rlen - 1] = 0;
return strres;
}
//-------- Refcounting ----------
#define REFCOUNT_OVERHEAD (sizeof(guint32) * 3)
#define REFCOUNT_MAGIC_LIVE_1 0xebdc1741
#define REFCOUNT_MAGIC_LIVE_2 0x17015ac9
#define REFCOUNT_MAGIC_DEAD_1 0x11dead11
#define REFCOUNT_MAGIC_DEAD_2 0x22dead22
#define REFCOUNT_CHECK(p) ((((guint32 *)(p))[-3] == REFCOUNT_MAGIC_LIVE_2) && (((guint32 *)(p))[-1] == REFCOUNT_MAGIC_LIVE_1))
#define REFCOUNT(p) (((guint32 *)p)[-2])
#undef TRACE_REFCOUNT
extern void *sci_refcount_alloc(size_t length) {
guint32 *data = (guint32 *)sci_malloc(REFCOUNT_OVERHEAD + length);
#ifdef TRACE_REFCOUNT
fprintf(stderr, "[] REF: Real-alloc at %p\n", data);
#endif
data += 3;
data[-1] = REFCOUNT_MAGIC_LIVE_1;
data[-3] = REFCOUNT_MAGIC_LIVE_2;
REFCOUNT(data) = 1;
#ifdef TRACE_REFCOUNT
fprintf(stderr, "[] REF: Alloc'd %p (ref=%d) OK=%d\n", data, REFCOUNT(data),
REFCOUNT_CHECK(data));
#endif
return data;
}
extern void *sci_refcount_incref(void *data) {
if (!REFCOUNT_CHECK(data)) {
BREAKPOINT();
} else
REFCOUNT(data)++;
#ifdef TRACE_REFCOUNT
fprintf(stderr, "[] REF: Inc'ing %p (now ref=%d)\n", data, REFCOUNT(data));
#endif
return data;
}
extern void sci_refcount_decref(void *data) {
#ifdef TRACE_REFCOUNT
fprintf(stderr, "[] REF: Dec'ing %p (prev ref=%d) OK=%d\n", data, REFCOUNT(data),
REFCOUNT_CHECK(data));
#endif
if (!REFCOUNT_CHECK(data)) {
BREAKPOINT();
} else if (--REFCOUNT(data) == 0) {
guint32 *fdata = (guint32 *)data;
fdata[-1] = REFCOUNT_MAGIC_DEAD_1;
fdata[-3] = REFCOUNT_MAGIC_DEAD_2;
#ifdef TRACE_REFCOUNT
fprintf(stderr, "[] REF: Freeing (%p)...\n", fdata - 3);
#endif
free(fdata - 3);
#ifdef TRACE_REFCOUNT
fprintf(stderr, "[] REF: Done.\n");
#endif
}
}
extern void *sci_refcount_memdup(void *data, size_t len) {
void *dest = sci_refcount_alloc(len);
memcpy(dest, data, len);
return dest;
}
} // End of namespace Sci
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