| 39 |
|
#endif |
| 40 |
|
|
| 41 |
|
#ifdef HAVE_MMAP_VM |
| 42 |
+ |
static char * next_address = 0; |
| 43 |
|
#ifdef HAVE_MMAP_ANON |
| 44 |
|
#define map_flags (MAP_PRIVATE | MAP_ANON) |
| 45 |
|
#define zero_fd -1 |
| 96 |
|
return VM_MAP_FAILED; |
| 97 |
|
#else |
| 98 |
|
#ifdef HAVE_MMAP_VM |
| 99 |
< |
if ((addr = mmap(0, size, VM_PAGE_DEFAULT, map_flags, zero_fd, 0)) == MAP_FAILED) |
| 99 |
> |
if ((addr = mmap(next_address, size, VM_PAGE_DEFAULT, map_flags, zero_fd, 0)) == MAP_FAILED) |
| 100 |
|
return VM_MAP_FAILED; |
| 101 |
|
|
| 102 |
+ |
next_address = (char *)addr + size; |
| 103 |
+ |
|
| 104 |
|
// Since I don't know the standard behavior of mmap(), zero-fill here |
| 105 |
|
if (memset(addr, 0, size) != addr) |
| 106 |
|
return VM_MAP_FAILED; |
| 157 |
|
|
| 158 |
|
int vm_release(void * addr, size_t size) |
| 159 |
|
{ |
| 160 |
+ |
// Safety check: don't try to release memory that was not allocated |
| 161 |
+ |
if (addr == VM_MAP_FAILED) |
| 162 |
+ |
return 0; |
| 163 |
+ |
|
| 164 |
|
#ifdef HAVE_MACH_VM |
| 165 |
|
int ret_code = vm_deallocate(mach_task_self(), (vm_address_t)addr, size); |
| 166 |
|
return ret_code == KERN_SUCCESS ? 0 : -1; |
