diff options
| -rw-r--r-- | bitbake/lib/bb/cache.py | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/bitbake/lib/bb/cache.py b/bitbake/lib/bb/cache.py index ab18dd5eaa..233f994279 100644 --- a/bitbake/lib/bb/cache.py +++ b/bitbake/lib/bb/cache.py @@ -883,3 +883,56 @@ class MultiProcessCache(object): p.dump([data, self.__class__.CACHE_VERSION]) bb.utils.unlockfile(glf) + + +class SimpleCache(object): + """ + BitBake multi-process cache implementation + + Used by the codeparser & file checksum caches + """ + + def __init__(self, version): + self.cachefile = None + self.cachedata = None + self.cacheversion = version + + def init_cache(self, d, cache_file_name=None, defaultdata=None): + cachedir = (d.getVar("PERSISTENT_DIR") or + d.getVar("CACHE")) + if not cachedir: + return defaultdata + + bb.utils.mkdirhier(cachedir) + self.cachefile = os.path.join(cachedir, + cache_file_name or self.__class__.cache_file_name) + logger.debug(1, "Using cache in '%s'", self.cachefile) + + glf = bb.utils.lockfile(self.cachefile + ".lock") + + try: + with open(self.cachefile, "rb") as f: + p = pickle.Unpickler(f) + data, version = p.load() + except: + bb.utils.unlockfile(glf) + return defaultdata + + bb.utils.unlockfile(glf) + + if version != self.cacheversion: + return defaultdata + + return data + + def save(self, data): + if not self.cachefile: + return + + glf = bb.utils.lockfile(self.cachefile + ".lock") + + with open(self.cachefile, "wb") as f: + p = pickle.Pickler(f, -1) + p.dump([data, self.cacheversion]) + + bb.utils.unlockfile(glf) |