int mmap_cache_get(MMapCache *m, int fd, int prot, unsigned context, bool keep_always, uint64_t offset, size_t size, struct stat *st, void **ret);
void mmap_cache_close_fd(MMapCache *m, int fd);
void mmap_cache_close_context(MMapCache *m, unsigned context);
int mmap_cache_get(MMapCache *m, int fd, int prot, unsigned context, bool keep_always, uint64_t offset, size_t size, struct stat *st, void **ret);
void mmap_cache_close_fd(MMapCache *m, int fd);
void mmap_cache_close_context(MMapCache *m, unsigned context);