59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
#include "libc/mem/mem.h"
|
|
#include "third_party/dlmalloc/dlmalloc.internal.h"
|
|
|
|
/**
|
|
* Frees and clears (sets to NULL) each non-null pointer in the given
|
|
* array. This is likely to be faster than freeing them one-by-one. If
|
|
* footers are used, pointers that have been allocated in different
|
|
* mspaces are not freed or cleared, and the count of all such pointers
|
|
* is returned. For large arrays of pointers with poor locality, it may
|
|
* be worthwhile to sort this array before calling bulk_free.
|
|
*/
|
|
size_t bulk_free(void *array[], size_t nelem) {
|
|
/*
|
|
* Try to free all pointers in the given array. Note: this could be
|
|
* made faster, by delaying consolidation, at the price of disabling
|
|
* some user integrity checks, We still optimize some consolidations
|
|
* by combining adjacent chunks before freeing, which will occur often
|
|
* if allocated with ialloc or the array is sorted.
|
|
*/
|
|
size_t unfreed = 0;
|
|
if (!PREACTION(g_dlmalloc)) {
|
|
void **a;
|
|
void **fence = &(array[nelem]);
|
|
for (a = array; a != fence; ++a) {
|
|
void *mem = *a;
|
|
if (mem != 0) {
|
|
mchunkptr p = mem2chunk(ADDRESS_DEATH_ACTION(mem));
|
|
size_t psize = chunksize(p);
|
|
#if FOOTERS
|
|
if (get_mstate_for(p) != g_dlmalloc) {
|
|
++unfreed;
|
|
continue;
|
|
}
|
|
#endif
|
|
check_inuse_chunk(g_dlmalloc, p);
|
|
*a = 0;
|
|
if (RTCHECK(ok_address(g_dlmalloc, p) && ok_inuse(p))) {
|
|
void **b = a + 1; /* try to merge with next chunk */
|
|
mchunkptr next = next_chunk(p);
|
|
if (b != fence && *b == chunk2mem(next)) {
|
|
size_t newsize = chunksize(next) + psize;
|
|
set_inuse(g_dlmalloc, p, newsize);
|
|
*b = chunk2mem(p);
|
|
} else
|
|
dlmalloc_dispose_chunk(g_dlmalloc, p, psize);
|
|
} else {
|
|
CORRUPTION_ERROR_ACTION(g_dlmalloc);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (should_trim(g_dlmalloc, g_dlmalloc->topsize)) {
|
|
dlmalloc_sys_trim(g_dlmalloc, 0);
|
|
}
|
|
POSTACTION(g_dlmalloc);
|
|
}
|
|
return unfreed;
|
|
}
|