annotate mercurial/mpatch.h @ 51233:ca81cd96000a

rust-index: add Sync bound to all relevant mmap-derived values

All readonly mmaps are Sync as far as Rust is concerned. Integrity of the
mmap'ed file is a concern separate to Rust's memory model, since it requires
out-of-program handling via locks, etc.

This will help when we start sharing the Rust Index with Python.

#ifndef HG_MPATCH_H
#define HG_MPATCH_H

#define MPATCH_ERR_NO_MEM -3
#define MPATCH_ERR_CANNOT_BE_DECODED -2
#define MPATCH_ERR_INVALID_PATCH -1

struct mpatch_frag {
	int start, end, len;
	const char *data;
};

struct mpatch_flist {
	struct mpatch_frag *base, *head, *tail;
};

int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist **res);
ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l);
void mpatch_lfree(struct mpatch_flist *a);
int mpatch_apply(char *buf, const char *orig, ssize_t len,
                 struct mpatch_flist *l);
struct mpatch_flist *
mpatch_fold(void *bins, struct mpatch_flist *(*get_next_item)(void *, ssize_t),
            ssize_t start, ssize_t end);

#endif