C++ (Cpp) mmap_cache_unref Examples

Example #1

File: test-mmap-cache.c Project: dankor/systemd

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;
}

Example #2

File: journal-remote-write.c Project: GuillaumeSeren/systemd

Writer* writer_free(Writer *w) {
        if (!w)
                return NULL;

        if (w->journal) {
                log_debug("Closing journal file %s.", w->journal->path);
                journal_file_close(w->journal);
        }

        if (w->server && w->hashmap_key)
                hashmap_remove(w->server->writers, w->hashmap_key);

        free(w->hashmap_key);

        if (w->mmap)
                mmap_cache_unref(w->mmap);

        return mfree(w);
}