int main(int argc, char *argv[]) {
MMapFileDescriptor *fx;
int x, y, z, r;
char px[] = "/tmp/testmmapXXXXXXX", py[] = "/tmp/testmmapYXXXXXX", pz[] = "/tmp/testmmapZXXXXXX";
MMapCache *m;
void *p, *q;
assert_se(m = mmap_cache_new());
x = mkostemp_safe(px);
assert_se(x >= 0);
unlink(px);
assert_se(fx = mmap_cache_add_fd(m, x));
y = mkostemp_safe(py);
assert_se(y >= 0);
unlink(py);
z = mkostemp_safe(pz);
assert_se(z >= 0);
unlink(pz);
r = mmap_cache_get(m, fx, PROT_READ, 0, false, 1, 2, NULL, &p, NULL);
assert_se(r >= 0);
r = mmap_cache_get(m, fx, PROT_READ, 0, false, 2, 2, NULL, &q, NULL);
assert_se(r >= 0);
assert_se((uint8_t*) p + 1 == (uint8_t*) q);
r = mmap_cache_get(m, fx, PROT_READ, 1, false, 3, 2, NULL, &q, NULL);
assert_se(r >= 0);
assert_se((uint8_t*) p + 2 == (uint8_t*) q);
r = mmap_cache_get(m, fx, PROT_READ, 0, false, 16ULL*1024ULL*1024ULL, 2, NULL, &p, NULL);
assert_se(r >= 0);
r = mmap_cache_get(m, fx, PROT_READ, 1, false, 16ULL*1024ULL*1024ULL+1, 2, NULL, &q, NULL);
assert_se(r >= 0);
assert_se((uint8_t*) p + 1 == (uint8_t*) q);
mmap_cache_free_fd(m, fx);
mmap_cache_unref(m);
safe_close(x);
safe_close(y);
safe_close(z);
return 0;
}
static int contains_uint64(MMapCache *m, int fd, uint64_t n, uint64_t p) {
uint64_t a, b;
int r;
assert(m);
assert(fd >= 0);
/* Bisection ... */
a = 0; b = n;
while (a < b) {
uint64_t c, *z;
c = (a + b) / 2;
r = mmap_cache_get(m, fd, PROT_READ|PROT_WRITE, 0, false, c * sizeof(uint64_t), sizeof(uint64_t), NULL, (void **) &z);
if (r < 0)
return r;
if (*z == p)
return 1;
if (a + 1 >= b)
return 0;
if (p < *z)
b = c;
else
a = c;
}
return 0;
}