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#include <stdbit.h>
#include <stdlib.h>
#include <array.h>
#include <alloc.h>
#include <errors.h>
typedef struct {
allocator_t inner;
ptrdiff_t num_allocs, last_alloc_size;
bool didfree;
} dbg_ctx_t;
static void *dbg_alloc(allocator_t, alloc_mode_t, void *, ptrdiff_t, ptrdiff_t,
ptrdiff_t, ptrdiff_t);
int
main(int, char **argv)
{
mlib_setprogname(argv[0]);
dbg_ctx_t ctx = {.inner = init_heap_allocator(nullptr)};
allocator_t mem = {
.alloc = dbg_alloc,
.ctx = &ctx,
};
int *xs = array_new(mem, int, 4);
if (ctx.num_allocs != 1)
err("ctx.num_allocs == %td\n", ctx.num_allocs);
/* Integers don’t need padding. It simplifies the test */
if (ctx.last_alloc_size != sizeof(_mlib_arr_hdr_t) + sizeof(int) * 4)
err("ctx.last_alloc_size == %td\n", ctx.last_alloc_size);
xs[0] = 1; xs[1] = 2;
xs[2] = 3; xs[3] = 4;
array_hdr(xs)->len = 4;
for (int i = 4; i < 69; i++) {
array_push(xs, i + 1);
if (stdc_count_ones((unsigned)i) == 1) {
/* Integers don’t need padding. It simplifies the test */
if ((size_t)ctx.last_alloc_size
!= sizeof(_mlib_arr_hdr_t) + sizeof(int) * i * 2)
{
err("ctx.last_alloc_size == %td\n", ctx.last_alloc_size);
}
}
}
for (int i = 0; i < 69; i++) {
if (xs[i] != i + 1)
err("xs[%d] == %d", i, xs[i]);
}
if (array_len(xs) != 69)
err("array_len(xs) == %td", array_len(xs));
array_free(xs);
if (!ctx.didfree)
err("ctx.did_free == false");
return EXIT_SUCCESS;
}
void *
dbg_alloc(allocator_t mem, alloc_mode_t mode, void *ptr, ptrdiff_t oldnmemb,
ptrdiff_t newnmemb, ptrdiff_t elemsz, ptrdiff_t align)
{
dbg_ctx_t *p = mem.ctx;
switch (mode) {
case ALLOC_NEW:
case ALLOC_RESIZE:
p->didfree = false;
p->num_allocs++;
p->last_alloc_size = newnmemb * elemsz;
break;
case ALLOC_FREE:
case ALLOC_FREEALL:
p->didfree = true;
}
return p->inner.alloc(p->inner, mode, ptr, oldnmemb, newnmemb, elemsz, align);
}
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