/*
* Close the least recently used window. You should check to see if
* the file descriptors need closing from time to time.
*/
static int git_mwindow_close_lru(git_mwindow_file *mwf)
{
unsigned int i;
git_mwindow *lru_w = NULL, *lru_l = NULL;
/* FIMXE: Does this give us any advantage? */
if(mwf->windows)
git_mwindow_scan_lru(mwf, &lru_w, &lru_l);
for (i = 0; i < ctl.windowfiles.length; ++i) {
git_mwindow_scan_lru(git_vector_get(&ctl.windowfiles, i), &lru_w, &lru_l);
}
if (lru_w) {
git_mwindow_close(&lru_w);
ctl.mapped -= lru_w->window_map.len;
git_futils_mmap_free(&lru_w->window_map);
if (lru_l)
lru_l->next = lru_w->next;
else
mwf->windows = lru_w->next;
free(lru_w);
ctl.open_windows--;
return GIT_SUCCESS;
}
return git__throw(GIT_ERROR, "Failed to close memory window. Couln't find LRU");
}
/*
* Free all the windows in a sequence, typically because we're done
* with the file
*/
void git_mwindow_free_all(git_mwindow_file *mwf)
{
unsigned int i;
/*
* Remove these windows from the global list
*/
for (i = 0; i < ctl.windowfiles.length; ++i){
if (git_vector_get(&ctl.windowfiles, i) == mwf) {
git_vector_remove(&ctl.windowfiles, i);
break;
}
}
if (ctl.windowfiles.length == 0) {
git_vector_free(&ctl.windowfiles);
ctl.windowfiles.contents = NULL;
}
while (mwf->windows) {
git_mwindow *w = mwf->windows;
assert(w->inuse_cnt == 0);
ctl.mapped -= w->window_map.len;
ctl.open_windows--;
git_futils_mmap_free(&w->window_map);
mwf->windows = w->next;
free(w);
}
}
void git_diff_file_content__unload(git_diff_file_content *fc)
{
if ((fc->flags & GIT_DIFF_FLAG__LOADED) == 0)
return;
if (fc->flags & GIT_DIFF_FLAG__FREE_DATA) {
git__free(fc->map.data);
fc->map.data = "";
fc->map.len = 0;
fc->flags &= ~GIT_DIFF_FLAG__FREE_DATA;
}
else if (fc->flags & GIT_DIFF_FLAG__UNMAP_DATA) {
git_futils_mmap_free(&fc->map);
fc->map.data = "";
fc->map.len = 0;
fc->flags &= ~GIT_DIFF_FLAG__UNMAP_DATA;
}
if (fc->flags & GIT_DIFF_FLAG__FREE_BLOB) {
git_blob_free((git_blob *)fc->blob);
fc->blob = NULL;
fc->flags &= ~GIT_DIFF_FLAG__FREE_BLOB;
}
fc->flags &= ~GIT_DIFF_FLAG__LOADED;
}
static void loose_backend__readstream_free(git_odb_stream *_stream)
{
loose_readstream *stream = (loose_readstream *)_stream;
git_futils_mmap_free(&stream->map);
git_zstream_free(&stream->zstream);
git__free(stream);
}
static int loose_backend__readstream(
git_odb_stream **stream_out,
size_t *len_out,
git_otype *type_out,
git_odb_backend *_backend,
const git_oid *oid)
{
loose_backend *backend;
loose_readstream *stream = NULL;
git_hash_ctx *hash_ctx = NULL;
git_buf object_path = GIT_BUF_INIT;
obj_hdr hdr;
int error = 0;
assert(stream_out && len_out && type_out && _backend && oid);
backend = (loose_backend *)_backend;
*stream_out = NULL;
*len_out = 0;
*type_out = GIT_OBJ_BAD;
if (locate_object(&object_path, backend, oid) < 0) {
error = git_odb__error_notfound("no matching loose object",
oid, GIT_OID_HEXSZ);
goto done;
}
stream = git__calloc(1, sizeof(loose_readstream));
GITERR_CHECK_ALLOC(stream);
hash_ctx = git__malloc(sizeof(git_hash_ctx));
GITERR_CHECK_ALLOC(hash_ctx);
if ((error = git_hash_ctx_init(hash_ctx)) < 0 ||
(error = git_futils_mmap_ro_file(&stream->map, object_path.ptr)) < 0 ||
(error = git_zstream_init(&stream->zstream, GIT_ZSTREAM_INFLATE)) < 0)
goto done;
/* check for a packlike loose object */
if (!is_zlib_compressed_data(stream->map.data, stream->map.len))
error = loose_backend__readstream_packlike(&hdr, stream);
else
error = loose_backend__readstream_standard(&hdr, stream);
if (error < 0)
goto done;
stream->stream.backend = _backend;
stream->stream.hash_ctx = hash_ctx;
stream->stream.read = &loose_backend__readstream_read;
stream->stream.free = &loose_backend__readstream_free;
*stream_out = (git_odb_stream *)stream;
*len_out = hdr.size;
*type_out = hdr.type;
done:
if (error < 0) {
git_futils_mmap_free(&stream->map);
git_zstream_free(&stream->zstream);
git_hash_ctx_cleanup(hash_ctx);
git__free(hash_ctx);
git__free(stream);
}
git_buf_dispose(&object_path);
return error;
}
