void *MEM_mallocN(size_t len, const char *str)
{
MemHead *memh;
mem_lock_thread();
len = (len + 3 ) & ~3; /* allocate in units of 4 */
memh= (MemHead *)malloc(len+sizeof(MemHead)+sizeof(MemTail));
if(memh) {
make_memhead_header(memh, len, str);
mem_unlock_thread();
if(malloc_debug_memset && len)
memset(memh+1, 255, len);
#ifdef DEBUG_MEMCOUNTER
if(_mallocn_count==DEBUG_MEMCOUNTER_ERROR_VAL)
memcount_raise("MEM_mallocN");
memh->_count= _mallocn_count++;
#endif
return (++memh);
}
mem_unlock_thread();
print_error("Malloc returns null: len=" SIZET_FORMAT " in %s, total %u\n", SIZET_ARG(len), str, mem_in_use);
return NULL;
}
/* note; mmap returns zero'd memory */
void *MEM_mapallocN(size_t len, const char *str)
{
MemHead *memh;
mem_lock_thread();
len = (len + 3 ) & ~3; /* allocate in units of 4 */
memh= mmap(NULL, len+sizeof(MemHead)+sizeof(MemTail),
PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0);
if(memh!=(MemHead *)-1) {
make_memhead_header(memh, len, str);
memh->mmap= 1;
mmap_in_use += len;
peak_mem = mmap_in_use > peak_mem ? mmap_in_use : peak_mem;
mem_unlock_thread();
#ifdef DEBUG_MEMCOUNTER
if(_mallocn_count==DEBUG_MEMCOUNTER_ERROR_VAL)
memcount_raise("MEM_mapallocN");
memh->_count= _mallocn_count++;
#endif
return (++memh);
}
else {
mem_unlock_thread();
print_error("Mapalloc returns null, fallback to regular malloc: len=" SIZET_FORMAT " in %s, total %u\n", SIZET_ARG(len), str, mmap_in_use);
return MEM_callocN(len, str);
}
}
